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stringlengths 1
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var args = process.argv.slice(2);
function time_to_seconds( hms ) {
var parts = hms.split(':');
var h = parseInt(parts[0]);
var m = parseInt(parts[1]);
var s = parseInt(parts[2]);
if ( h < 12 ) {
h += 24;
}
var seconds = parseInt(parts[0]) * 60 * 60 + parseInt(parts[1]) * 60 + parseInt(parts[2]);
return seconds;
}
function seconds_to_time( s ) {
var h = Math.floor( s/(60 * 60) );
if ( h < 10 ) {
h = '0' + h;
}
s = s % (60 * 60);
var m = Math.floor( s/60 );
if ( m < 10 ) {
m = '0' + m;
}
s = s % 60
if ( s < 10 ) {
s = '0' + s;
}
return h + ':' + m + ':' + s;
}
var sum = 0, count = 0, idx;
for (idx in args) {
var seconds = time_to_seconds( args[idx] );
sum += seconds;
count++;
}
var seconds = Math.floor( sum / count )
console.log( 'Mean time is ', seconds_to_time(seconds)); | 1,120Averages/Mean time of day
| 10javascript
| id0ol |
package main
import (
"fmt"
"math"
)
func main() {
sum, sumr, prod := 0., 0., 1.
for n := 1.; n <= 10; n++ {
sum += n
sumr += 1 / n
prod *= n
}
a, g, h := sum/10, math.Pow(prod, .1), 10/sumr
fmt.Println("A:", a, "G:", g, "H:", h)
fmt.Println("A >= G >= H:", a >= g && g >= h)
} | 1,117Averages/Pythagorean means
| 0go
| cvl9g |
function to_bt(n)
local d = { '0', '+', '-' }
local v = { 0, 1, -1 }
local b = ""
while n ~= 0 do
local r = n % 3
if r < 0 then
r = r + 3
end
b = b .. d[r + 1]
n = n - v[r + 1]
n = math.floor(n / 3)
end
return b:reverse()
end
function from_bt(s)
local n = 0
for i=1,s:len() do
local c = s:sub(i,i)
n = n * 3
if c == '+' then
n = n + 1
elseif c == '-' then
n = n - 1
end
end
return n
end
function last_char(s)
return s:sub(-1,-1)
end
function add(b1,b2)
local out = "oops"
if b1 ~= "" and b2 ~= "" then
local d = ""
local L1 = last_char(b1)
local c1 = b1:sub(1,-2)
local L2 = last_char(b2)
local c2 = b2:sub(1,-2)
if L2 < L1 then
L2, L1 = L1, L2
end
if L1 == '-' then
if L2 == '0' then
d = "-"
end
if L2 == '-' then
d = "+-"
end
elseif L1 == '+' then
if L2 == '0' then
d = "+"
elseif L2 == '-' then
d = "0"
elseif L2 == '+' then
d = "-+"
end
elseif L1 == '0' then
if L2 == '0' then
d = "0"
end
end
local ob1 = add(c1,d:sub(2,2))
local ob2 = add(ob1,c2)
out = ob2 .. d:sub(1,1)
elseif b1 ~= "" then
out = b1
elseif b2 ~= "" then
out = b2
else
out = ""
end
return out
end
function unary_minus(b)
local out = ""
for i=1, b:len() do
local c = b:sub(i,i)
if c == '-' then
out = out .. '+'
elseif c == '+' then
out = out .. '-'
else
out = out .. c
end
end
return out
end
function subtract(b1,b2)
return add(b1, unary_minus(b2))
end
function mult(b1,b2)
local r = "0"
local c1 = b1
local c2 = b2:reverse()
for i=1,c2:len() do
local c = c2:sub(i,i)
if c == '+' then
r = add(r, c1)
elseif c == '-' then
r = subtract(r, c1)
end
c1 = c1 .. '0'
end
while r:sub(1,1) == '0' do
r = r:sub(2)
end
return r
end
function main()
local a = "+-0++0+"
local b = to_bt(-436)
local c = "+-++-"
local d = mult(a, subtract(b, c))
print(string.format(" a:%14s%10d", a, from_bt(a)))
print(string.format(" b:%14s%10d", b, from_bt(b)))
print(string.format(" c:%14s%10d", c, from_bt(c)))
print(string.format("a*(b-c):%14s%10d", d, from_bt(d)))
end
main() | 1,119Balanced ternary
| 1lua
| 8is0e |
(let [i 42]
(assert (= i 42))) | 1,130Assertions
| 6clojure
| rj3g2 |
fun <T> modeOf(a: Array<T>) {
val sortedByFreq = a.groupBy { it }.entries.sortedByDescending { it.value.size }
val maxFreq = sortedByFreq.first().value.size
val modes = sortedByFreq.takeWhile { it.value.size == maxFreq }
if (modes.size == 1)
println("The mode of the collection is ${modes.first().key} which has a frequency of $maxFreq")
else {
print("There are ${modes.size} modes with a frequency of $maxFreq, namely: ")
println(modes.map { it.key }.joinToString(", "))
}
}
fun main(args: Array<String>) {
val a = arrayOf(7, 1, 1, 6, 2, 4, 2, 4, 2, 1, 5)
println("[" + a.joinToString(", ") + "]")
modeOf(a)
println()
val b = arrayOf(true, false, true, false, true, true)
println("[" + b.joinToString(", ") + "]")
modeOf(b)
} | 1,118Averages/Mode
| 11kotlin
| sosq7 |
typedef struct{
float* values;
int size;
}vector;
vector extractVector(char* str){
vector coeff;
int i=0,count = 1;
char* token;
while(str[i]!=00){
if(str[i++]==' ')
count++;
}
coeff.values = (float*)malloc(count*sizeof(float));
coeff.size = count;
token = strtok(str,);
i = 0;
while(token!=NULL){
coeff.values[i++] = atof(token);
token = strtok(NULL,);
}
return coeff;
}
vector processSignalFile(char* fileName){
int i,j;
float sum;
char str[MAX_LEN];
vector coeff1,coeff2,signal,filteredSignal;
FILE* fp = fopen(fileName,);
fgets(str,MAX_LEN,fp);
coeff1 = extractVector(str);
fgets(str,MAX_LEN,fp);
coeff2 = extractVector(str);
fgets(str,MAX_LEN,fp);
signal = extractVector(str);
fclose(fp);
filteredSignal.values = (float*)calloc(signal.size,sizeof(float));
filteredSignal.size = signal.size;
for(i=0;i<signal.size;i++){
sum = 0;
for(j=0;j<coeff2.size;j++){
if(i-j>=0)
sum += coeff2.values[j]*signal.values[i-j];
}
for(j=0;j<coeff1.size;j++){
if(i-j>=0)
sum -= coeff1.values[j]*filteredSignal.values[i-j];
}
sum /= coeff1.values[0];
filteredSignal.values[i] = sum;
}
return filteredSignal;
}
void printVector(vector v, char* outputFile){
int i;
if(outputFile==NULL){
printf();
for(i=0;i<v.size;i++)
printf(,v.values[i]);
printf();
}
else{
FILE* fp = fopen(outputFile,);
for(i=0;i<v.size-1;i++)
fprintf(fp,,v.values[i]);
fprintf(fp,,v.values[i]);
fclose(fp);
}
}
int main(int argC,char* argV[])
{
char *str;
if(argC<2||argC>3)
printf(,argV[0]);
else{
if(argC!=2){
str = (char*)malloc((strlen(argV[2]) + strlen(str) + 1)*sizeof(char));
strcpy(str,);
}
printf(,(argC==2)?:strcat(str,argV[2]));
printVector(processSignalFile(argV[1]),argV[2]);
}
return 0;
} | 1,131Apply a digital filter (direct form II transposed)
| 5c
| u4nv4 |
import java.util.HashSet;
import java.util.Random;
import java.util.Set;
public class AverageLoopLength {
private static final int N = 100000; | 1,123Average loop length
| 9java
| 9ltmu |
lastvalues <- local(
{
values <- c();
function(x, len)
{
values <<- c(values, x);
lenv <- length(values);
if(lenv > len) values <<- values[(len-lenv):-1]
values
}
})
moving.average <- function(latestvalue, len=3)
{
is.numeric.scalar <- function(x) is.numeric(x) && length(x)==1L
if(!is.numeric.scalar(latestvalue) ||!is.numeric.scalar(len))
{
stop("all arguments must be numeric scalars")
}
mean(lastvalues(latestvalue, len))
}
moving.average(5)
moving.average(1)
moving.average(-3)
moving.average(8)
moving.average(7) | 1,115Averages/Simple moving average
| 13r
| v4427 |
class AvlTree {
private var root: Node? = null
private class Node(var key: Int, var parent: Node?) {
var balance: Int = 0
var left: Node? = null
var right: Node? = null
}
fun insert(key: Int): Boolean {
if (root == null)
root = Node(key, null)
else {
var n: Node? = root
var parent: Node
while (true) {
if (n!!.key == key) return false
parent = n
val goLeft = n.key > key
n = if (goLeft) n.left else n.right
if (n == null) {
if (goLeft)
parent.left = Node(key, parent)
else
parent.right = Node(key, parent)
rebalance(parent)
break
}
}
}
return true
}
fun delete(delKey: Int) {
if (root == null) return
var n: Node? = root
var parent: Node? = root
var delNode: Node? = null
var child: Node? = root
while (child!= null) {
parent = n
n = child
child = if (delKey >= n.key) n.right else n.left
if (delKey == n.key) delNode = n
}
if (delNode!= null) {
delNode.key = n!!.key
child = if (n.left!= null) n.left else n.right
if (0 == root!!.key.compareTo(delKey)) {
root = child
if (null!= root) {
root!!.parent = null
}
} else {
if (parent!!.left == n)
parent.left = child
else
parent.right = child
if (null!= child) {
child.parent = parent
}
rebalance(parent)
}
}
private fun rebalance(n: Node) {
setBalance(n)
var nn = n
if (nn.balance == -2)
if (height(nn.left!!.left) >= height(nn.left!!.right))
nn = rotateRight(nn)
else
nn = rotateLeftThenRight(nn)
else if (nn.balance == 2)
if (height(nn.right!!.right) >= height(nn.right!!.left))
nn = rotateLeft(nn)
else
nn = rotateRightThenLeft(nn)
if (nn.parent!= null) rebalance(nn.parent!!)
else root = nn
}
private fun rotateLeft(a: Node): Node {
val b: Node? = a.right
b!!.parent = a.parent
a.right = b.left
if (a.right!= null) a.right!!.parent = a
b.left = a
a.parent = b
if (b.parent!= null) {
if (b.parent!!.right == a)
b.parent!!.right = b
else
b.parent!!.left = b
}
setBalance(a, b)
return b
}
private fun rotateRight(a: Node): Node {
val b: Node? = a.left
b!!.parent = a.parent
a.left = b.right
if (a.left!= null) a.left!!.parent = a
b.right = a
a.parent = b
if (b.parent!= null) {
if (b.parent!!.right == a)
b.parent!!.right = b
else
b.parent!!.left = b
}
setBalance(a, b)
return b
}
private fun rotateLeftThenRight(n: Node): Node {
n.left = rotateLeft(n.left!!)
return rotateRight(n)
}
private fun rotateRightThenLeft(n: Node): Node {
n.right = rotateRight(n.right!!)
return rotateLeft(n)
}
private fun height(n: Node?): Int {
if (n == null) return -1
return 1 + Math.max(height(n.left), height(n.right))
}
private fun setBalance(vararg nodes: Node) {
for (n in nodes) n.balance = height(n.right) - height(n.left)
}
fun printKey() {
printKey(root)
println()
}
private fun printKey(n: Node?) {
if (n!= null) {
printKey(n.left)
print("${n.key} ")
printKey(n.right)
}
}
fun printBalance() {
printBalance(root)
println()
}
private fun printBalance(n: Node?) {
if (n!= null) {
printBalance(n.left)
print("${n.balance} ")
printBalance(n.right)
}
}
}
fun main(args: Array<String>) {
val tree = AvlTree()
println("Inserting values 1 to 10")
for (i in 1..10) tree.insert(i)
print("Printing key : ")
tree.printKey()
print("Printing balance: ")
tree.printBalance()
} | 1,121AVL tree
| 11kotlin
| exba4 |
import java.util.Arrays;
public class AverageMeanAngle {
public static void main(String[] args) {
printAverageAngle(350.0, 10.0);
printAverageAngle(90.0, 180.0, 270.0, 360.0);
printAverageAngle(10.0, 20.0, 30.0);
printAverageAngle(370.0);
printAverageAngle(180.0);
}
private static void printAverageAngle(double... sample) {
double meanAngle = getMeanAngle(sample);
System.out.printf("The mean angle of%s is%s%n", Arrays.toString(sample), meanAngle);
}
public static double getMeanAngle(double... anglesDeg) {
double x = 0.0;
double y = 0.0;
for (double angleD: anglesDeg) {
double angleR = Math.toRadians(angleD);
x += Math.cos(angleR);
y += Math.sin(angleR);
}
double avgR = Math.atan2(y / anglesDeg.length, x / anglesDeg.length);
return Math.toDegrees(avgR);
}
} | 1,122Averages/Mean angle
| 9java
| dt0n9 |
def arithMean = { list ->
list == null \
? null \
: list.empty \
? 0 \
: list.sum() / list.size()
}
def geomMean = { list ->
list == null \
? null \
: list.empty \
? 1 \
: list.inject(1) { prod, item -> prod*item } ** (1 / list.size())
}
def harmMean = { list ->
list == null \
? null \
: list.empty \
? 0 \
: list.size() / list.collect { 1.0/it }.sum()
} | 1,117Averages/Pythagorean means
| 7groovy
| 3m6zd |
import java.util.*;
class MergeMaps {
public static void main(String[] args) {
Map<String, Object> base = new HashMap<>();
base.put("name", "Rocket Skates");
base.put("price", 12.75);
base.put("color", "yellow");
Map<String, Object> update = new HashMap<>();
update.put("price", 15.25);
update.put("color", "red");
update.put("year", 1974);
Map<String, Object> result = new HashMap<>(base);
result.putAll(update);
System.out.println(result);
}
} | 1,127Associative array/Merging
| 9java
| g7y4m |
(() => {
'use strict';
console.log(JSON.stringify(
Object.assign({}, | 1,127Associative array/Merging
| 10javascript
| kp2hq |
const val NMAX = 20
const val TESTS = 1000000
val rand = java.util.Random()
fun avg(n: Int): Double {
var sum = 0
for (t in 0 until TESTS) {
val v = BooleanArray(NMAX)
var x = 0
while (!v[x]) {
v[x] = true
sum++
x = rand.nextInt(n)
}
}
return sum.toDouble() / TESTS
}
fun ana(n: Int): Double {
val nn = n.toDouble()
var term = 1.0
var sum = 1.0
for (i in n - 1 downTo 1) {
term *= i / nn
sum += term
}
return sum
}
fun main(args: Array<String>) {
println(" N average analytical (error)")
println("=== ========= ============ =========")
for (n in 1..NMAX) {
val a = avg(n)
val b = ana(n)
println(String.format("%3d %6.4f %10.4f (%4.2f%%)", n, a, b, Math.abs(a - b) / b * 100.0))
}
} | 1,123Average loop length
| 11kotlin
| z6ots |
null | 1,120Averages/Mean time of day
| 11kotlin
| 1ekpd |
AVL={balance=0}
AVL.__mt={__index = AVL}
function AVL:new(list)
local o={}
setmetatable(o, AVL.__mt)
for _,v in ipairs(list or {}) do
o=o:insert(v)
end
return o
end
function AVL:rebalance()
local rotated=false
if self.balance>1 then
if self.right.balance<0 then
self.right, self.right.left.right, self.right.left = self.right.left, self.right, self.right.left.right
self.right.right.balance=self.right.balance>-1 and 0 or 1
self.right.balance=self.right.balance>0 and 2 or 1
end
self, self.right.left, self.right = self.right, self, self.right.left
self.left.balance=1-self.balance
self.balance=self.balance==0 and -1 or 0
rotated=true
elseif self.balance<-1 then
if self.left.balance>0 then
self.left, self.left.right.left, self.left.right = self.left.right, self.left, self.left.right.left
self.left.left.balance=self.left.balance<1 and 0 or -1
self.left.balance=self.left.balance<0 and -2 or -1
end
self, self.left.right, self.left = self.left, self, self.left.right
self.right.balance=-1-self.balance
self.balance=self.balance==0 and 1 or 0
rotated=true
end
return self,rotated
end
function AVL:insert(v)
if not self.value then
self.value=v
self.balance=0
return self,1
end
local grow
if v==self.value then
return self,0
elseif v<self.value then
if not self.left then self.left=self:new() end
self.left,grow=self.left:insert(v)
self.balance=self.balance-grow
else
if not self.right then self.right=self:new() end
self.right,grow=self.right:insert(v)
self.balance=self.balance+grow
end
self,rotated=self:rebalance()
return self, (rotated or self.balance==0) and 0 or grow
end
function AVL:delete_move(dir,other,mul)
if self[dir] then
local sb2,v
self[dir], sb2, v=self[dir]:delete_move(dir,other,mul)
self.balance=self.balance+sb2*mul
self,sb2=self:rebalance()
return self,(sb2 or self.balance==0) and -1 or 0,v
else
return self[other],-1,self.value
end
end
function AVL:delete(v,isSubtree)
local grow=0
if v==self.value then
local v
if self.balance>0 then
self.right,grow,v=self.right:delete_move("left","right",-1)
elseif self.left then
self.left,grow,v=self.left:delete_move("right","left",1)
grow=-grow
else
return not isSubtree and AVL:new(),-1
end
self.value=v
self.balance=self.balance+grow
elseif v<self.value and self.left then
self.left,grow=self.left:delete(v,true)
self.balance=self.balance-grow
elseif v>self.value and self.right then
self.right,grow=self.right:delete(v,true)
self.balance=self.balance+grow
else
return self,0
end
self,rotated=self:rebalance()
return self, grow~=0 and (rotated or self.balance==0) and -1 or 0
end | 1,121AVL tree
| 1lua
| wqpea |
function sum(a) {
var s = 0;
for (var i = 0; i < a.length; i++) s += a[i];
return s;
}
function degToRad(a) {
return Math.PI / 180 * a;
}
function meanAngleDeg(a) {
return 180 / Math.PI * Math.atan2(
sum(a.map(degToRad).map(Math.sin)) / a.length,
sum(a.map(degToRad).map(Math.cos)) / a.length
);
}
var a = [350, 10], b = [90, 180, 270, 360], c = [10, 20, 30];
console.log(meanAngleDeg(a));
console.log(meanAngleDeg(b));
console.log(meanAngleDeg(c)); | 1,122Averages/Mean angle
| 10javascript
| 6md38 |
import Data.List (genericLength)
import Control.Monad (zipWithM_)
mean :: Double -> [Double] -> Double
mean 0 xs = product xs ** (1 / genericLength xs)
mean p xs = (1 / genericLength xs * sum (map (** p) xs)) ** (1/p)
main = do
let ms = zipWith ((. flip mean [1..10]). (,)) "agh" [1, 0, -1]
mapM_ (\(t,m) -> putStrLn $ t: ": " ++ show m) ms
putStrLn $ " a >= g >= h is " ++ show ((\(_,[a,g,h])-> a>=g && g>=h) (unzip ms)) | 1,117Averages/Pythagorean means
| 8haskell
| pe1bt |
package main
import (
"fmt"
"log"
"math/big"
)
func max(a, b *big.Float) *big.Float {
if a.Cmp(b) > 0 {
return a
}
return b
}
func isClose(a, b *big.Float) bool {
relTol := big.NewFloat(1e-9) | 1,128Approximate equality
| 0go
| lvncw |
(defn gen-brackets [n]
(->> (concat (repeat n \[) (repeat n \]))
shuffle
(apply str ,)))
(defn balanced? [s]
(loop [[first & coll] (seq s)
stack '()]
(if first
(if (= first \[)
(recur coll (conj stack \[))
(when (= (peek stack) \[)
(recur coll (pop stack))))
(zero? (count stack))))) | 1,129Balanced brackets
| 6clojure
| 2unl1 |
main() {
var i = 42;
assert( i == 42 );
} | 1,130Assertions
| 18dart
| y9q65 |
function mode(tbl) | 1,118Averages/Mode
| 1lua
| 0i0sd |
fun main() {
val base = HashMap<String,String>()
val update = HashMap<String,String>()
base["name"] = "Rocket Skates"
base["price"] = "12.75"
base["color"] = "yellow"
update["price"] = "15.25"
update["color"] = "red"
update["year"] = "1974"
val merged = HashMap(base)
merged.putAll(update)
println("base: $base")
println("update: $update")
println("merged: $merged")
} | 1,127Associative array/Merging
| 11kotlin
| 2ufli |
function average(n, reps)
local count = 0
for r = 1, reps do
local f = {}
for i = 1, n do f[i] = math.random(n) end
local seen, x = {}, 1
while not seen[x] do
seen[x], x, count = true, f[x], count+1
end
end
return count / reps
end
function analytical(n)
local s, t = 1, 1
for i = n-1, 1, -1 do t=t*i/n s=s+t end
return s
end
print(" N average analytical (error)")
print("=== ========= ============ =========")
for n = 1, 20 do
local avg, ana = average(n, 1e6), analytical(n)
local err = (avg-ana) / ana * 100
print(string.format("%3d %9.4f %12.4f (%6.3f%%)", n, avg, ana, err))
end | 1,123Average loop length
| 1lua
| 3yizo |
class Approximate {
private static boolean approxEquals(double value, double other, double epsilon) {
return Math.abs(value - other) < epsilon
}
private static void test(double a, double b) {
double epsilon = 1e-18
System.out.printf("%f,%f =>%s\n", a, b, approxEquals(a, b, epsilon))
}
static void main(String[] args) {
test(100000000000000.01, 100000000000000.011)
test(100.01, 100.011)
test(10000000000000.001 / 10000.0, 1000000000.0000001000)
test(0.001, 0.0010000001)
test(0.000000000000000000000101, 0.0)
test(Math.sqrt(2.0) * Math.sqrt(2.0), 2.0)
test(-Math.sqrt(2.0) * Math.sqrt(2.0), -2.0)
test(3.14159265358979323846, 3.14159265358979324)
}
} | 1,128Approximate equality
| 7groovy
| 6ms3o |
class (Num a, Ord a, Eq a) => AlmostEq a where
eps :: a
infix 4 ~=
(~=) :: AlmostEq a => a -> a -> Bool
a ~= b = or [ a == b
, abs (a - b) < eps * abs(a + b)
, abs (a - b) < eps ]
instance AlmostEq Int where eps = 0
instance AlmostEq Integer where eps = 0
instance AlmostEq Double where eps = 1e-14
instance AlmostEq Float where eps = 1e-5 | 1,128Approximate equality
| 8haskell
| 1eups |
typedef const char *STRING;
typedef struct{STRING fullname, office, extension, homephone, email; } gecos_t;
typedef struct{STRING account, password; int uid, gid; gecos_t gecos; STRING directory, shell; } passwd_t;
passwd_t passwd_list[]={
{, , 1001, 1000,
{, , , , },
, },
{, , 1002, 1000,
{, , , , },
, }
};
main(){
FILE *passwd_text=fopen(, );
int rec_num;
for(rec_num=0; rec_num < sizeof passwd_list/sizeof(passwd_t); rec_num++)
fprintf(passwd_text, PASSWD_FMT, passwd_list[rec_num]);
fclose(passwd_text);
passwd_text=fopen(, );
char passwd_buf[BUFSIZ];
passwd_t new_rec =
{, , 1003, 1000,
{, , , , },
, };
sprintf(passwd_buf, PASSWD_FMT, new_rec);
write(fileno(passwd_text), passwd_buf, strlen(passwd_buf));
close(passwd_text);
passwd_text=fopen(, );
while(!feof(passwd_text))
fscanf(passwd_text, , passwd_buf, );
if(strstr(passwd_buf, ))
printf(, passwd_buf);
} | 1,132Append a record to the end of a text file
| 5c
| g7f45 |
double mean(double *v, int len)
{
double sum = 0;
int i;
for (i = 0; i < len; i++)
sum += v[i];
return sum / len;
}
int main(void)
{
double v[] = {1, 2, 2.718, 3, 3.142};
int i, len;
for (len = 5; len >= 0; len--) {
printf();
for (i = 0; i < len; i++)
printf(i ? : , v[i]);
printf(, mean(v, len));
}
return 0;
} | 1,133Averages/Arithmetic mean
| 5c
| 2u0lo |
base = {name="Rocket Skates", price=12.75, color="yellow"}
update = {price=15.25, color="red", year=1974} | 1,127Associative array/Merging
| 1lua
| v5t2x |
package main
import "fmt"
func isPrime(n int) bool {
switch {
case n < 2:
return false
case n%2 == 0:
return n == 2
case n%3 == 0:
return n == 3
default:
d := 5
for d*d <= n {
if n%d == 0 {
return false
}
d += 2
if n%d == 0 {
return false
}
d += 4
}
return true
}
}
func countPrimeFactors(n int) int {
switch {
case n == 1:
return 0
case isPrime(n):
return 1
default:
count, f := 0, 2
for {
if n%f == 0 {
count++
n /= f
if n == 1 {
return count
}
if isPrime(n) {
f = n
}
} else if f >= 3 {
f += 2
} else {
f = 3
}
}
return count
}
}
func main() {
const max = 120
fmt.Println("The attractive numbers up to and including", max, "are:")
count := 0
for i := 1; i <= max; i++ {
n := countPrimeFactors(i)
if isPrime(n) {
fmt.Printf("%4d", i)
count++
if count % 20 == 0 {
fmt.Println()
}
}
}
fmt.Println()
} | 1,124Attractive numbers
| 0go
| jkv7d |
local times = {"23:00:17","23:40:20","00:12:45","00:17:19"} | 1,120Averages/Mean time of day
| 1lua
| awb1v |
null | 1,122Averages/Mean angle
| 11kotlin
| 0oesf |
public class Approximate {
private static boolean approxEquals(double value, double other, double epsilon) {
return Math.abs(value - other) < epsilon;
}
private static void test(double a, double b) {
double epsilon = 1e-18;
System.out.printf("%f,%f =>%s\n", a, b, approxEquals(a, b, epsilon));
}
public static void main(String[] args) {
test(100000000000000.01, 100000000000000.011);
test(100.01, 100.011);
test(10000000000000.001 / 10000.0, 1000000000.0000001000);
test(0.001, 0.0010000001);
test(0.000000000000000000000101, 0.0);
test(Math.sqrt(2.0) * Math.sqrt(2.0), 2.0);
test(-Math.sqrt(2.0) * Math.sqrt(2.0), -2.0);
test(3.14159265358979323846, 3.14159265358979324);
}
} | 1,128Approximate equality
| 9java
| 7hmrj |
package main
import (
"fmt"
"math/rand"
"sync"
"time"
)
const nBuckets = 10
type bucketList struct {
b [nBuckets]int | 1,126Atomic updates
| 0go
| 7hcr2 |
use List::Util qw(sum reduce);
sub find_loop {
my($n) = @_;
my($r,@seen);
while () { $seen[$r] = $seen[($r = int(1+rand $n))] ? return sum @seen : 1 }
}
print " N empiric theoric (error)\n";
print "=== ========= ============ =========\n";
my $MAX = 20;
my $TRIALS = 1000;
for my $n (1 .. $MAX) {
my $empiric = ( sum map { find_loop($n) } 1..$TRIALS ) / $TRIALS;
my $theoric = sum map { (reduce { $a*$b } $_**2, ($n-$_+1)..$n ) / $n ** ($_+1) } 1..$n;
printf "%3d %9.4f %12.4f (%5.2f%%)\n",
$n, $empiric, $theoric, 100 * ($empiric - $theoric) / $theoric;
} | 1,123Average loop length
| 2perl
| b1gk4 |
class AttractiveNumbers {
static boolean isPrime(int n) {
if (n < 2) return false
if (n % 2 == 0) return n == 2
if (n % 3 == 0) return n == 3
int d = 5
while (d * d <= n) {
if (n % d == 0) return false
d += 2
if (n % d == 0) return false
d += 4
}
return true
}
static int countPrimeFactors(int n) {
if (n == 1) return 0
if (isPrime(n)) return 1
int count = 0, f = 2
while (true) {
if (n % f == 0) {
count++
n /= f
if (n == 1) return count
if (isPrime(n)) f = n
} else if (f >= 3) f += 2
else f = 3
}
}
static void main(String[] args) {
final int max = 120
printf("The attractive numbers up to and including%d are:\n", max)
int count = 0
for (int i = 1; i <= max; ++i) {
int n = countPrimeFactors(i)
if (isPrime(n)) {
printf("%4d", i)
if (++count % 20 == 0) println()
}
}
println()
}
} | 1,124Attractive numbers
| 7groovy
| 5gmuv |
function meanAngle (angleList)
local sumSin, sumCos = 0, 0
for i, angle in pairs(angleList) do
sumSin = sumSin + math.sin(math.rad(angle))
sumCos = sumCos + math.cos(math.rad(angle))
end
local result = math.deg(math.atan2(sumSin, sumCos))
return string.format("%.2f", result)
end
print(meanAngle({350, 10}))
print(meanAngle({90, 180, 270, 360}))
print(meanAngle({10, 20, 30})) | 1,122Averages/Mean angle
| 1lua
| 8iw0e |
use strict;
use warnings;
my @d = qw( 0 + - );
my @v = qw( 0 1 -1 );
sub to_bt {
my $n = shift;
my $b = '';
while( $n ) {
my $r = $n%3;
$b .= $d[$r];
$n -= $v[$r];
$n /= 3;
}
return scalar reverse $b;
}
sub from_bt {
my $n = 0;
for( split //, shift ) {
$n *= 3;
$n += "${_}1" if $_;
}
return $n;
}
my %addtable = (
'-0' => [ '-', '' ],
'+0' => [ '+', '' ],
'+-' => [ '0', '' ],
'00' => [ '0', '' ],
'--' => [ '+', '-' ],
'++' => [ '-', '+' ],
);
sub add {
my ($b1, $b2) = @_;
return ($b1 or $b2 ) unless ($b1 and $b2);
my $d = $addtable{ join '', sort substr( $b1, -1, 1, '' ), substr( $b2, -1, 1, '' ) };
return add( add($b1, $d->[1]), $b2 ).$d->[0];
}
sub unary_minus {
my $b = shift;
$b =~ tr/-+/+-/;
return $b;
}
sub subtract {
my ($b1, $b2) = @_;
return add( $b1, unary_minus $b2 );
}
sub mult {
my ($b1, $b2) = @_;
my $r = '0';
for( reverse split //, $b2 ){
$r = add $r, $b1 if $_ eq '+';
$r = subtract $r, $b1 if $_ eq '-';
$b1 .= '0';
}
$r =~ s/^0+//;
return $r;
}
my $a = "+-0++0+";
my $b = to_bt( -436 );
my $c = "+-++-";
my $d = mult( $a, subtract( $b, $c ) );
printf " a:%14s%10d\n", $a, from_bt( $a );
printf " b:%14s%10d\n", $b, from_bt( $b );
printf " c:%14s%10d\n", $c, from_bt( $c );
printf "a*(b-c):%14s%10d\n", $d, from_bt( $d ); | 1,119Balanced ternary
| 2perl
| 5gvu2 |
import kotlin.math.abs
import kotlin.math.sqrt
fun approxEquals(value: Double, other: Double, epsilon: Double): Boolean {
return abs(value - other) < epsilon
}
fun test(a: Double, b: Double) {
val epsilon = 1e-18
println("$a, $b => ${approxEquals(a, b, epsilon)}")
}
fun main() {
test(100000000000000.01, 100000000000000.011)
test(100.01, 100.011)
test(10000000000000.001 / 10000.0, 1000000000.0000001000)
test(0.001, 0.0010000001)
test(0.000000000000000000000101, 0.0)
test(sqrt(2.0) * sqrt(2.0), 2.0)
test(-sqrt(2.0) * sqrt(2.0), -2.0)
test(3.14159265358979323846, 3.14159265358979324)
} | 1,128Approximate equality
| 11kotlin
| u4tvc |
class Buckets {
def cells = []
final n
Buckets(n, limit=1000, random=new Random()) {
this.n = n
(0..<n).each {
cells << random.nextInt(limit)
}
}
synchronized getAt(i) {
cells[i]
}
synchronized transfer(from, to, amount) {
assert from in (0..<n) && to in (0..<n)
def cappedAmt = [cells[from], amount].min()
cells[from] -= cappedAmt
cells[to] += cappedAmt
}
synchronized String toString() { cells.toString() }
}
def random = new Random()
def buckets = new Buckets(5)
def makeCloser = { i, j ->
synchronized(buckets) {
def targetDiff = (buckets[i]-buckets[j]).intdiv(2)
if (targetDiff < 0) {
buckets.transfer(j, i, -targetDiff)
} else {
buckets.transfer(i, j, targetDiff)
}
}
}
def randomize = { i, j ->
synchronized(buckets) {
def targetLimit = buckets[i] + buckets[j]
def targetI = random.nextInt(targetLimit + 1)
if (targetI < buckets[i]) {
buckets.transfer(i, j, buckets[i] - targetI)
} else {
buckets.transfer(j, i, targetI - buckets[i])
}
}
}
Thread.start {
def start = System.currentTimeMillis()
while (start + 10000 > System.currentTimeMillis()) {
def i = random.nextInt(buckets.n)
def j = random.nextInt(buckets.n)
makeCloser(i, j)
}
}
Thread.start {
def start = System.currentTimeMillis()
while (start + 10000 > System.currentTimeMillis()) {
def i = random.nextInt(buckets.n)
def j = random.nextInt(buckets.n)
randomize(i, j)
}
}
def start = System.currentTimeMillis()
while (start + 10000 > System.currentTimeMillis()) {
synchronized(buckets) {
def sum = buckets.cells.sum()
println "${new Date()}: checksum: ${sum} buckets: ${buckets}"
}
Thread.sleep(500)
} | 1,126Atomic updates
| 7groovy
| u43v9 |
using System;
using System.Collections.Generic;
namespace AssocArrays
{
class Program
{
static void Main(string[] args)
{
Dictionary<string,int> assocArray = new Dictionary<string,int>();
assocArray[] = 1;
assocArray.Add(, 2);
assocArray[] = 3;
foreach (KeyValuePair<string, int> kvp in assocArray)
{
Console.WriteLine(kvp.Key + + kvp.Value);
}
foreach (string key in assocArray.Keys)
{
Console.WriteLine(key);
}
foreach (int val in assocArray.Values)
{
Console.WriteLine(val.ToString());
}
}
}
} | 1,134Associative array/Iteration
| 5c
| nf7i6 |
package main
import "fmt"
type filter struct {
b, a []float64
}
func (f filter) filter(in []float64) []float64 {
out := make([]float64, len(in))
s := 1. / f.a[0]
for i := range in {
tmp := 0.
b := f.b
if i+1 < len(b) {
b = b[:i+1]
}
for j, bj := range b {
tmp += bj * in[i-j]
}
a := f.a[1:]
if i < len(a) {
a = a[:i]
}
for j, aj := range a {
tmp -= aj * out[i-j-1]
}
out[i] = tmp * s
}
return out
} | 1,131Apply a digital filter (direct form II transposed)
| 0go
| 0orsk |
(defn mean [sq]
(if (empty? sq)
0
(/ (reduce + sq) (count sq)))) | 1,133Averages/Arithmetic mean
| 6clojure
| g7d4f |
use strict;
use warnings;
my %base = ("name" => "Rocket Skates", "price" => 12.75, "color" => "yellow");
my %more = ("price" => 15.25, "color" => "red", "year" => 1974);
print "Update\n";
my %update = (%base, %more);
printf "%-7s%s\n", $_, $update{$_} for sort keys %update;
print "\nMerge\n";
my %merge;
$merge{$_} = [$base{$_}] for keys %base;
push @{$merge{$_}}, $more{$_} for keys %more;
printf "%-7s%s\n", $_, join ', ', @{$merge{$_}} for sort keys %merge; | 1,127Associative array/Merging
| 2perl
| s8hq3 |
def simple_moving_average(size)
nums = []
sum = 0.0
lambda do |hello|
nums << hello
goodbye = nums.length > size? nums.shift: 0
sum += hello - goodbye
sum / nums.length
end
end
ma3 = simple_moving_average(3)
ma5 = simple_moving_average(5)
(1.upto(5).to_a + 5.downto(1).to_a).each do |num|
printf ,
num, ma3.call(num), ma5.call(num)
end | 1,115Averages/Simple moving average
| 14ruby
| 7kkri |
import Data.Numbers.Primes
import Data.Bool (bool)
attractiveNumbers :: [Integer]
attractiveNumbers =
[1 ..] >>= (bool [] . return) <*> (isPrime . length . primeFactors)
main :: IO ()
main = print $ takeWhile (<= 120) attractiveNumbers | 1,124Attractive numbers
| 8haskell
| one8p |
n=0
while n**2% 1000000 != 269696:
n += 1
print(n)
>>> [x for x in range(30000) if (x*x)% 1000000 == 269696] [0]
25264 | 1,116Babbage problem
| 3python
| x0swr |
function approxEquals(value, other, epsilon)
return math.abs(value - other) < epsilon
end
function test(a, b)
local epsilon = 1e-18
print(string.format("%f,%f =>%s", a, b, tostring(approxEquals(a, b, epsilon))))
end
function main()
test(100000000000000.01, 100000000000000.011);
test(100.01, 100.011)
test(10000000000000.001 / 10000.0, 1000000000.0000001000)
test(0.001, 0.0010000001)
test(0.000000000000000000000101, 0.0)
test(math.sqrt(2.0) * math.sqrt(2.0), 2.0)
test(-math.sqrt(2.0) * math.sqrt(2.0), -2.0)
test(3.14159265358979323846, 3.14159265358979324)
end
main() | 1,128Approximate equality
| 1lua
| 5gzu6 |
module AtomicUpdates (main) where
import Control.Concurrent (forkIO, threadDelay)
import Control.Concurrent.MVar (MVar, newMVar, readMVar, modifyMVar_)
import Control.Monad (forever, forM_)
import Data.IntMap (IntMap, (!), toAscList, fromList, adjust)
import System.Random (randomRIO)
import Text.Printf (printf)
type Index = Int
type Value = Integer
data Buckets = Buckets Index (MVar (IntMap Value))
makeBuckets :: Int -> IO Buckets
size :: Buckets -> Index
currentValue :: Buckets -> Index -> IO Value
currentValues :: Buckets -> IO (IntMap Value)
transfer :: Buckets -> Index -> Index -> Value -> IO ()
makeBuckets n = do v <- newMVar (fromList [(i, 100) | i <- [1..n]])
return (Buckets n v)
size (Buckets n _) = n
currentValue (Buckets _ v) i = fmap (! i) (readMVar v)
currentValues (Buckets _ v) = readMVar v
transfer b@(Buckets n v) i j amt | amt < 0 = transfer b j i (-amt)
| otherwise = do
modifyMVar_ v $ \map -> let amt' = min amt (map! i)
in return $ adjust (subtract amt') i
$ adjust (+ amt') j
$ map
roughen, smooth, display:: Buckets -> IO ()
pick buckets = randomRIO (1, size buckets)
roughen buckets = forever loop where
loop = do i <- pick buckets
j <- pick buckets
iv <- currentValue buckets i
transfer buckets i j (iv `div` 3)
smooth buckets = forever loop where
loop = do i <- pick buckets
j <- pick buckets
iv <- currentValue buckets i
jv <- currentValue buckets j
transfer buckets i j ((iv - jv) `div` 4)
display buckets = forever loop where
loop = do threadDelay 1000000
bmap <- currentValues buckets
putStrLn (report $ map snd $ toAscList bmap)
report list = "\nTotal: " ++ show (sum list) ++ "\n" ++ bars
where bars = concatMap row $ map (*40) $ reverse [1..5]
row lim = printf "%3d " lim ++ [if x >= lim then '*' else ' ' | x <- list] ++ "\n"
main = do buckets <- makeBuckets 100
forkIO (roughen buckets)
forkIO (smooth buckets)
display buckets | 1,126Atomic updates
| 8haskell
| 8ip0z |
class DigitalFilter {
private static double[] filter(double[] a, double[] b, double[] signal) {
double[] result = new double[signal.length]
for (int i = 0; i < signal.length; ++i) {
double tmp = 0.0
for (int j = 0; j < b.length; ++j) {
if (i - j < 0) continue
tmp += b[j] * signal[i - j]
}
for (int j = 1; j < a.length; ++j) {
if (i - j < 0) continue
tmp -= a[j] * result[i - j]
}
tmp /= a[0]
result[i] = tmp
}
return result
}
static void main(String[] args) {
double[] a = [1.00000000, -2.77555756e-16, 3.33333333e-01, -1.85037171e-17] as double[]
double[] b = [0.16666667, 0.5, 0.5, 0.16666667] as double[]
double[] signal = [
-0.917843918645, 0.141984778794, 1.20536903482, 0.190286794412,
-0.662370894973, -1.00700480494, -0.404707073677, 0.800482325044,
0.743500089861, 1.01090520172, 0.741527555207, 0.277841675195,
0.400833448236, -0.2085993586, -0.172842103641, -0.134316096293,
0.0259303398477, 0.490105989562, 0.549391221511, 0.9047198589
] as double[]
double[] result = filter(a, b, signal)
for (int i = 0; i < result.length; ++i) {
printf("% .8f", result[i])
print((i + 1) % 5 != 0 ? ", ": "\n")
}
}
} | 1,131Apply a digital filter (direct form II transposed)
| 7groovy
| exval |
<?
$base = array( => , => 12.75, => );
$update = array( => 15.25, => , => 1974);
$result = $update + $base;
print_r($result);
?> | 1,127Associative array/Merging
| 12php
| u4zv5 |
(() => {
'use strict'; | 1,124Attractive numbers
| 10javascript
| 8ia0l |
import java.util.Arrays;
import java.util.List;
public class PythagoreanMeans {
public static double arithmeticMean(List<Double> numbers) {
if (numbers.isEmpty()) return Double.NaN;
double mean = 0.0;
for (Double number : numbers) {
mean += number;
}
return mean / numbers.size();
}
public static double geometricMean(List<Double> numbers) {
if (numbers.isEmpty()) return Double.NaN;
double mean = 1.0;
for (Double number : numbers) {
mean *= number;
}
return Math.pow(mean, 1.0 / numbers.size());
}
public static double harmonicMean(List<Double> numbers) {
if (numbers.isEmpty() || numbers.contains(0.0)) return Double.NaN;
double mean = 0.0;
for (Double number : numbers) {
mean += (1.0 / number);
}
return numbers.size() / mean;
}
public static void main(String[] args) {
Double[] array = {1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0};
List<Double> list = Arrays.asList(array);
double arithmetic = arithmeticMean(list);
double geometric = geometricMean(list);
double harmonic = harmonicMean(list);
System.out.format("A =%f G =%f H =%f%n", arithmetic, geometric, harmonic);
System.out.format("A >= G is%b, G >= H is%b%n", (arithmetic >= geometric), (geometric >= harmonic));
}
} | 1,117Averages/Pythagorean means
| 9java
| rh7g0 |
babbage_function=function(){
n=0
while (n**2%%1000000!=269696) {
n=n+1
}
return(n)
}
babbage_function()[length(babbage_function())] | 1,116Babbage problem
| 13r
| 1wepn |
import Data.List (tails)
conv :: Num a => [a] -> [a] -> [a]
conv ker = map (dot (reverse ker)) . tails . pad
where
pad v = replicate (length ker - 1) 0 ++ v
dot v = sum . zipWith (*) v
dFilter :: [Double] -> [Double] -> [Double] -> [Double]
dFilter (a0:a) b s = tail res
where
res = (/ a0) <$> 0: zipWith (-) (conv b s) (conv a res) | 1,131Apply a digital filter (direct form II transposed)
| 8haskell
| c2094 |
base = {:, :12.75, :}
update = {:15.25, :, :1974}
result = {**base, **update}
print(result) | 1,127Associative array/Merging
| 3python
| 0oksq |
struct SimpleMovingAverage {
period: usize,
numbers: Vec<usize>
}
impl SimpleMovingAverage {
fn new(p: usize) -> SimpleMovingAverage {
SimpleMovingAverage {
period: p,
numbers: Vec::new()
}
}
fn add_number(&mut self, number: usize) -> f64 {
self.numbers.push(number);
if self.numbers.len() > self.period {
self.numbers.remove(0);
}
if self.numbers.is_empty() {
return 0f64;
}else {
let sum = self.numbers.iter().fold(0, |acc, x| acc+x);
return sum as f64 / self.numbers.len() as f64;
}
}
}
fn main() {
for period in [3, 5].iter() {
println!("Moving average with period {}", period);
let mut sma = SimpleMovingAverage::new(*period);
for i in [1, 2, 3, 4, 5, 5, 4, 3, 2, 1].iter() {
println!("Number: {} | Average: {}", i, sma.add_number(*i));
}
}
} | 1,115Averages/Simple moving average
| 15rust
| jbb72 |
public class Attractive {
static boolean is_prime(int n) {
if (n < 2) return false;
if (n % 2 == 0) return n == 2;
if (n % 3 == 0) return n == 3;
int d = 5;
while (d *d <= n) {
if (n % d == 0) return false;
d += 2;
if (n % d == 0) return false;
d += 4;
}
return true;
}
static int count_prime_factors(int n) {
if (n == 1) return 0;
if (is_prime(n)) return 1;
int count = 0, f = 2;
while (true) {
if (n % f == 0) {
count++;
n /= f;
if (n == 1) return count;
if (is_prime(n)) f = n;
}
else if (f >= 3) f += 2;
else f = 3;
}
}
public static void main(String[] args) {
final int max = 120;
System.out.printf("The attractive numbers up to and including%d are:\n", max);
for (int i = 1, count = 0; i <= max; ++i) {
int n = count_prime_factors(i);
if (is_prime(n)) {
System.out.printf("%4d", i);
if (++count % 20 == 0) System.out.println();
}
}
System.out.println();
}
} | 1,124Attractive numbers
| 9java
| wqhej |
import enum
class entry_not_found(Exception):
pass
class entry_already_exists(Exception):
pass
class state(enum.Enum):
header = 0
left_high = 1
right_high = 2
balanced = 3
class direction(enum.Enum):
from_left = 0
from_right = 1
from abc import ABC, abstractmethod
class comparer(ABC):
@abstractmethod
def compare(self,t):
pass
class node(comparer):
def __init__(self):
self.parent = None
self.left = self
self.right = self
self.balance = state.header
def compare(self,t):
if self.key < t:
return -1
elif t < self.key:
return 1
else:
return 0
def is_header(self):
return self.balance == state.header
def length(self):
if self != None:
if self.left != None:
left = self.left.length()
else:
left = 0
if self.right != None:
right = self.right.length()
else:
right = 0
return left + right + 1
else:
return 0
def rotate_left(self):
_parent = self.parent
x = self.right
self.parent = x
x.parent = _parent
if x.left is not None:
x.left.parent = self
self.right = x.left
x.left = self
return x
def rotate_right(self):
_parent = self.parent
x = self.left
self.parent = x
x.parent = _parent;
if x.right is not None:
x.right.parent = self
self.left = x.right
x.right = self
return x
def balance_left(self):
_left = self.left
if _left is None:
return self;
if _left.balance == state.left_high:
self.balance = state.balanced
_left.balance = state.balanced
self = self.rotate_right()
elif _left.balance == state.right_high:
subright = _left.right
if subright.balance == state.balanced:
self.balance = state.balanced
_left.balance = state.balanced
elif subright.balance == state.right_high:
self.balance = state.balanced
_left.balance = state.left_high
elif subright.balance == left_high:
root.balance = state.right_high
_left.balance = state.balanced
subright.balance = state.balanced
_left = _left.rotate_left()
self.left = _left
self = self.rotate_right()
elif _left.balance == state.balanced:
self.balance = state.left_high
_left.balance = state.right_high
self = self.rotate_right()
return self;
def balance_right(self):
_right = self.right
if _right is None:
return self;
if _right.balance == state.right_high:
self.balance = state.balanced
_right.balance = state.balanced
self = self.rotate_left()
elif _right.balance == state.left_high:
subleft = _right.left;
if subleft.balance == state.balanced:
self.balance = state.balanced
_right.balance = state.balanced
elif subleft.balance == state.left_high:
self.balance = state.balanced
_right.balance = state.right_high
elif subleft.balance == state.right_high:
self.balance = state.left_high
_right.balance = state.balanced
subleft.balance = state.balanced
_right = _right.rotate_right()
self.right = _right
self = self.rotate_left()
elif _right.balance == state.balanced:
self.balance = state.right_high
_right.balance = state.left_high
self = self.rotate_left()
return self
def balance_tree(self, direct):
taller = True
while taller:
_parent = self.parent;
if _parent.left == self:
next_from = direction.from_left
else:
next_from = direction.from_right;
if direct == direction.from_left:
if self.balance == state.left_high:
if _parent.is_header():
_parent.parent = _parent.parent.balance_left()
elif _parent.left == self:
_parent.left = _parent.left.balance_left()
else:
_parent.right = _parent.right.balance_left()
taller = False
elif self.balance == state.balanced:
self.balance = state.left_high
taller = True
elif self.balance == state.right_high:
self.balance = state.balanced
taller = False
else:
if self.balance == state.left_high:
self.balance = state.balanced
taller = False
elif self.balance == state.balanced:
self.balance = state.right_high
taller = True
elif self.balance == state.right_high:
if _parent.is_header():
_parent.parent = _parent.parent.balance_right()
elif _parent.left == self:
_parent.left = _parent.left.balance_right()
else:
_parent.right = _parent.right.balance_right()
taller = False
if taller:
if _parent.is_header():
taller = False
else:
self = _parent
direct = next_from
def balance_tree_remove(self, _from):
if self.is_header():
return;
shorter = True;
while shorter:
_parent = self.parent;
if _parent.left == self:
next_from = direction.from_left
else:
next_from = direction.from_right
if _from == direction.from_left:
if self.balance == state.left_high:
shorter = True
elif self.balance == state.balanced:
self.balance = state.right_high;
shorter = False
elif self.balance == state.right_high:
if self.right is not None:
if self.right.balance == state.balanced:
shorter = False
else:
shorter = True
else:
shorter = False;
if _parent.is_header():
_parent.parent = _parent.parent.balance_right()
elif _parent.left == self:
_parent.left = _parent.left.balance_right();
else:
_parent.right = _parent.right.balance_right()
else:
if self.balance == state.right_high:
self.balance = state.balanced
shorter = True
elif self.balance == state.balanced:
self.balance = state.left_high
shorter = False
elif self.balance == state.left_high:
if self.left is not None:
if self.left.balance == state.balanced:
shorter = False
else:
shorter = True
else:
short = False;
if _parent.is_header():
_parent.parent = _parent.parent.balance_left();
elif _parent.left == self:
_parent.left = _parent.left.balance_left();
else:
_parent.right = _parent.right.balance_left();
if shorter:
if _parent.is_header():
shorter = False
else:
_from = next_from
self = _parent
def previous(self):
if self.is_header():
return self.right
if self.left is not None:
y = self.left
while y.right is not None:
y = y.right
return y
else:
y = self.parent;
if y.is_header():
return y
x = self
while x == y.left:
x = y
y = y.parent
return y
def next(self):
if self.is_header():
return self.left
if self.right is not None:
y = self.right
while y.left is not None:
y = y.left
return y;
else:
y = self.parent
if y.is_header():
return y
x = self;
while x == y.right:
x = y
y = y.parent;
return y
def swap_nodes(a, b):
if b == a.left:
if b.left is not None:
b.left.parent = a
if b.right is not None:
b.right.parent = a
if a.right is not None:
a.right.parent = b
if not a.parent.is_header():
if a.parent.left == a:
a.parent.left = b
else:
a.parent.right = b;
else:
a.parent.parent = b
b.parent = a.parent
a.parent = b
a.left = b.left
b.left = a
temp = a.right
a.right = b.right
b.right = temp
elif b == a.right:
if b.right is not None:
b.right.parent = a
if b.left is not None:
b.left.parent = a
if a.left is not None:
a.left.parent = b
if not a.parent.is_header():
if a.parent.left == a:
a.parent.left = b
else:
a.parent.right = b
else:
a.parent.parent = b
b.parent = a.parent
a.parent = b
a.right = b.right
b.right = a
temp = a.left
a.left = b.left
b.left = temp
elif a == b.left:
if a.left is not None:
a.left.parent = b
if a.right is not None:
a.right.parent = b
if b.right is not None:
b.right.parent = a
if not parent.is_header():
if b.parent.left == b:
b.parent.left = a
else:
b.parent.right = a
else:
b.parent.parent = a
a.parent = b.parent
b.parent = a
b.left = a.left
a.left = b
temp = a.right
a.right = b.right
b.right = temp
elif a == b.right:
if a.right is not None:
a.right.parent = b
if a.left is not None:
a.left.parent = b
if b.left is not None:
b.left.parent = a
if not b.parent.is_header():
if b.parent.left == b:
b.parent.left = a
else:
b.parent.right = a
else:
b.parent.parent = a
a.parent = b.parent
b.parent = a
b.right = a.right
a.right = b
temp = a.left
a.left = b.left
b.left = temp
else:
if a.parent == b.parent:
temp = a.parent.left
a.parent.left = a.parent.right
a.parent.right = temp
else:
if not a.parent.is_header():
if a.parent.left == a:
a.parent.left = b
else:
a.parent.right = b
else:
a.parent.parent = b
if not b.parent.is_header():
if b.parent.left == b:
b.parent.left = a
else:
b.parent.right = a
else:
b.parent.parent = a
if b.left is not None:
b.left.parent = a
if b.right is not None:
b.right.parent = a
if a.left is not None:
a.left.parent = b
if a.right is not None:
a.right.parent = b
temp1 = a.left
a.left = b.left
b.left = temp1
temp2 = a.right
a.right = b.right
b.right = temp2
temp3 = a.parent
a.parent = b.parent
b.parent = temp3
balance = a.balance
a.balance = b.balance
b.balance = balance
class parent_node(node):
def __init__(self, parent):
self.parent = parent
self.left = None
self.right = None
self.balance = state.balanced
class set_node(node):
def __init__(self, parent, key):
self.parent = parent
self.left = None
self.right = None
self.balance = state.balanced
self.key = key
class ordered_set:
def __init__(self):
self.header = node()
def __iter__(self):
self.node = self.header
return self
def __next__(self):
self.node = self.node.next()
if self.node.is_header():
raise StopIteration
return self.node.key
def __delitem__(self, key):
self.remove(key)
def __lt__(self, other):
first1 = self.header.left
last1 = self.header
first2 = other.header.left
last2 = other.header
while (first1 != last1) and (first2 != last2):
l = first1.key < first2.key
if not l:
first1 = first1.next();
first2 = first2.next();
else:
return True;
a = self.__len__()
b = other.__len__()
return a < b
def __hash__(self):
h = 0
for i in self:
h = h + i.__hash__()
return h
def __eq__(self, other):
if self < other:
return False
if other < self:
return False
return True
def __ne__(self, other):
if self < other:
return True
if other < self:
return True
return False
def __len__(self):
return self.header.parent.length()
def __getitem__(self, key):
return self.contains(key)
def __str__(self):
l = self.header.right
s =
i = self.header.left
h = self.header
while i != h:
s = s + i.key.__str__()
if i != l:
s = s +
i = i.next()
s = s +
return s
def __or__(self, other):
r = ordered_set()
first1 = self.header.left
last1 = self.header
first2 = other.header.left
last2 = other.header
while first1 != last1 and first2 != last2:
les = first1.key < first2.key
graater = first2.key < first1.key
if les:
r.add(first1.key)
first1 = first1.next()
elif graater:
r.add(first2.key)
first2 = first2.next()
else:
r.add(first1.key)
first1 = first1.next()
first2 = first2.next()
while first1 != last1:
r.add(first1.key)
first1 = first1.next()
while first2 != last2:
r.add(first2.key)
first2 = first2.next()
return r
def __and__(self, other):
r = ordered_set()
first1 = self.header.left
last1 = self.header
first2 = other.header.left
last2 = other.header
while first1 != last1 and first2 != last2:
les = first1.key < first2.key
graater = first2.key < first1.key
if les:
first1 = first1.next()
elif graater:
first2 = first2.next()
else:
r.add(first1.key)
first1 = first1.next()
first2 = first2.next()
return r
def __xor__(self, other):
r = ordered_set()
first1 = self.header.left
last1 = self.header
first2 = other.header.left
last2 = other.header
while first1 != last1 and first2 != last2:
les = first1.key < first2.key
graater = first2.key < first1.key
if les:
r.add(first1.key)
first1 = first1.next()
elif graater:
r.add(first2.key)
first2 = first2.next()
else:
first1 = first1.next()
first2 = first2.next()
while first1 != last1:
r.add(first1.key)
first1 = first1.next()
while first2 != last2:
r.add(first2.key)
first2 = first2.next()
return r
def __sub__(self, other):
r = ordered_set()
first1 = self.header.left
last1 = self.header
first2 = other.header.left
last2 = other.header
while first1 != last1 and first2 != last2:
les = first1.key < first2.key
graater = first2.key < first1.key
if les:
r.add(first1.key)
first1 = first1.next()
elif graater:
r.add(first2.key)
first2 = first2.next()
else:
first1 = first1.next()
first2 = first2.next()
while first1 != last1:
r.add(first1.key)
first1 = first1.next()
return r
def __lshift__(self, data):
self.add(data)
return self
def __rshift__(self, data):
self.remove(data)
return self
def is_subset(self, other):
first1 = self.header.left
last1 = self.header
first2 = other.header.left
last2 = other.header
is_subet = True
while first1 != last1 and first2 != last2:
if first1.key < first2.key:
is_subset = False
break
elif first2.key < first1.key:
first2 = first2.next()
else:
first1 = first1.next()
first2 = first2.next()
if is_subet:
if first1 != last1:
is_subet = False
return is_subet
def is_superset(self,other):
return other.is_subset(self)
def add(self, data):
if self.header.parent is None:
self.header.parent = set_node(self.header,data)
self.header.left = self.header.parent
self.header.right = self.header.parent
else:
root = self.header.parent
while True:
c = root.compare(data)
if c >= 0:
if root.left is not None:
root = root.left
else:
new_node = set_node(root,data)
root.left = new_node
if self.header.left == root:
self.header.left = new_node
root.balance_tree(direction.from_left)
return
else:
if root.right is not None:
root = root.right
else:
new_node = set_node(root, data)
root.right = new_node
if self.header.right == root:
self.header.right = new_node
root.balance_tree(direction.from_right)
return
def remove(self,data):
root = self.header.parent;
while True:
if root is None:
raise entry_not_found()
c = root.compare(data)
if c < 0:
root = root.left;
elif c > 0:
root = root.right;
else:
if root.left is not None:
if root.right is not None:
replace = root.left
while replace.right is not None:
replace = replace.right
root.swap_nodes(replace)
_parent = root.parent
if _parent.left == root:
_from = direction.from_left
else:
_from = direction.from_right
if self.header.left == root:
n = root.next();
if n.is_header():
self.header.left = self.header
self.header.right = self.header
else:
self.header.left = n
elif self.header.right == root:
p = root.previous();
if p.is_header():
self.header.left = self.header
self.header.right = self.header
else:
self.header.right = p
if root.left is None:
if _parent == self.header:
self.header.parent = root.right
elif _parent.left == root:
_parent.left = root.right
else:
_parent.right = root.right
if root.right is not None:
root.right.parent = _parent
else:
if _parent == self.header:
self.header.parent = root.left
elif _parent.left == root:
_parent.left = root.left
else:
_parent.right = root.left
if root.left is not None:
root.left.parent = _parent;
_parent.balance_tree_remove(_from)
return
def contains(self,data):
root = self.header.parent;
while True:
if root == None:
return False
c = root.compare(data);
if c > 0:
root = root.left;
elif c < 0:
root = root.right;
else:
return True
def find(self,data):
root = self.header.parent;
while True:
if root == None:
raise entry_not_found()
c = root.compare(data);
if c > 0:
root = root.left;
elif c < 0:
root = root.right;
else:
return root.key;
class key_value(comparer):
def __init__(self, key, value):
self.key = key
self.value = value
def compare(self,kv):
if self.key < kv.key:
return -1
elif kv.key < self.key:
return 1
else:
return 0
def __lt__(self, other):
return self.key < other.key
def __str__(self):
return '(' + self.key.__str__() + ',' + self.value.__str__() + ')'
def __eq__(self, other):
return self.key == other.key
def __hash__(self):
return hash(self.key)
class dictionary:
def __init__(self):
self.set = ordered_set()
return None
def __lt__(self, other):
if self.keys() < other.keys():
return true
if other.keys() < self.keys():
return false
first1 = self.set.header.left
last1 = self.set.header
first2 = other.set.header.left
last2 = other.set.header
while (first1 != last1) and (first2 != last2):
l = first1.key.value < first2.key.value
if not l:
first1 = first1.next();
first2 = first2.next();
else:
return True;
a = self.__len__()
b = other.__len__()
return a < b
def add(self, key, value):
try:
self.set.remove(key_value(key,None))
except entry_not_found:
pass
self.set.add(key_value(key,value))
return
def remove(self, key):
self.set.remove(key_value(key,None))
return
def clear(self):
self.set.header = node()
def sort(self):
sort_bag = bag()
for e in self:
sort_bag.add(e.value)
keys_set = self.keys()
self.clear()
i = sort_bag.__iter__()
i = sort_bag.__next__()
try:
for e in keys_set:
self.add(e,i)
i = sort_bag.__next__()
except:
return
def keys(self):
keys_set = ordered_set()
for e in self:
keys_set.add(e.key)
return keys_set
def __len__(self):
return self.set.header.parent.length()
def __str__(self):
l = self.set.header.right;
s =
i = self.set.header.left;
h = self.set.header;
while i != h:
s = s +
s = s + i.key.key.__str__()
s = s +
s = s + i.key.value.__str__()
s = s +
if i != l:
s = s +
i = i.next()
s = s +
return s;
def __iter__(self):
self.set.node = self.set.header
return self
def __next__(self):
self.set.node = self.set.node.next()
if self.set.node.is_header():
raise StopIteration
return key_value(self.set.node.key.key,self.set.node.key.value)
def __getitem__(self, key):
kv = self.set.find(key_value(key,None))
return kv.value
def __setitem__(self, key, value):
self.add(key,value)
return
def __delitem__(self, key):
self.set.remove(key_value(key,None))
class array:
def __init__(self):
self.dictionary = dictionary()
return None
def __len__(self):
return self.dictionary.__len__()
def push(self, value):
k = self.dictionary.set.header.right
if k == self.dictionary.set.header:
self.dictionary.add(0,value)
else:
self.dictionary.add(k.key.key+1,value)
return
def pop(self):
if self.dictionary.set.header.parent != None:
data = self.dictionary.set.header.right.key.value
self.remove(self.dictionary.set.header.right.key.key)
return data
def add(self, key, value):
try:
self.dictionary.remove(key)
except entry_not_found:
pass
self.dictionary.add(key,value)
return
def remove(self, key):
self.dictionary.remove(key)
return
def sort(self):
self.dictionary.sort()
def clear(self):
self.dictionary.header = node();
def __iter__(self):
self.dictionary.node = self.dictionary.set.header
return self
def __next__(self):
self.dictionary.node = self.dictionary.node.next()
if self.dictionary.node.is_header():
raise StopIteration
return self.dictionary.node.key.value
def __getitem__(self, key):
kv = self.dictionary.set.find(key_value(key,None))
return kv.value
def __setitem__(self, key, value):
self.add(key,value)
return
def __delitem__(self, key):
self.dictionary.remove(key)
def __lshift__(self, data):
self.push(data)
return self
def __lt__(self, other):
return self.dictionary < other.dictionary
def __str__(self):
l = self.dictionary.set.header.right;
s =
i = self.dictionary.set.header.left;
h = self.dictionary.set.header;
while i != h:
s = s + i.key.value.__str__()
if i != l:
s = s +
i = i.next()
s = s +
return s;
class bag:
def __init__(self):
self.header = node()
def __iter__(self):
self.node = self.header
return self
def __delitem__(self, key):
self.remove(key)
def __next__(self):
self.node = self.node.next()
if self.node.is_header():
raise StopIteration
return self.node.key
def __str__(self):
l = self.header.right;
s =
i = self.header.left;
h = self.header;
while i != h:
s = s + i.key.__str__()
if i != l:
s = s +
i = i.next()
s = s +
return s;
def __len__(self):
return self.header.parent.length()
def __lshift__(self, data):
self.add(data)
return self
def add(self, data):
if self.header.parent is None:
self.header.parent = set_node(self.header,data)
self.header.left = self.header.parent
self.header.right = self.header.parent
else:
root = self.header.parent
while True:
c = root.compare(data)
if c >= 0:
if root.left is not None:
root = root.left
else:
new_node = set_node(root,data)
root.left = new_node
if self.header.left == root:
self.header.left = new_node
root.balance_tree(direction.from_left)
return
else:
if root.right is not None:
root = root.right
else:
new_node = set_node(root, data)
root.right = new_node
if self.header.right == root:
self.header.right = new_node
root.balance_tree(direction.from_right)
return
def remove_first(self,data):
root = self.header.parent;
while True:
if root is None:
return False;
c = root.compare(data);
if c > 0:
root = root.left;
elif c < 0:
root = root.right;
else:
if root.left is not None:
if root.right is not None:
replace = root.left;
while replace.right is not None:
replace = replace.right;
root.swap_nodes(replace);
_parent = root.parent
if _parent.left == root:
_from = direction.from_left
else:
_from = direction.from_right
if self.header.left == root:
n = root.next();
if n.is_header():
self.header.left = self.header
self.header.right = self.header
else:
self.header.left = n;
elif self.header.right == root:
p = root.previous();
if p.is_header():
self.header.left = self.header
self.header.right = self.header
else:
self.header.right = p
if root.left is None:
if _parent == self.header:
self.header.parent = root.right
elif _parent.left == root:
_parent.left = root.right
else:
_parent.right = root.right
if root.right is not None:
root.right.parent = _parent
else:
if _parent == self.header:
self.header.parent = root.left
elif _parent.left == root:
_parent.left = root.left
else:
_parent.right = root.left
if root.left is not None:
root.left.parent = _parent;
_parent.balance_tree_remove(_from)
return True;
def remove(self,data):
success = self.remove_first(data)
while success:
success = self.remove_first(data)
def remove_node(self, root):
if root.left != None and root.right != None:
replace = root.left
while replace.right != None:
replace = replace.right
root.swap_nodes(replace)
parent = root.parent;
if parent.left == root:
next_from = direction.from_left
else:
next_from = direction.from_right
if self.header.left == root:
n = root.next()
if n.is_header():
self.header.left = self.header;
self.header.right = self.header
else:
self.header.left = n
elif self.header.right == root:
p = root.previous()
if p.is_header():
root.header.left = root.header
root.header.right = header
else:
self.header.right = p
if root.left == None:
if parent == self.header:
self.header.parent = root.right
elif parent.left == root:
parent.left = root.right
else:
parent.right = root.right
if root.right != None:
root.right.parent = parent
else:
if parent == self.header:
self.header.parent = root.left
elif parent.left == root:
parent.left = root.left
else:
parent.right = root.left
if root.left != None:
root.left.parent = parent;
parent.balance_tree_remove(next_from)
def remove_at(self, data, ophset):
p = self.search(data);
if p == None:
return
else:
lower = p
after = after(data)
s = 0
while True:
if ophset == s:
remove_node(lower);
return;
lower = lower.next_node()
if after == lower:
break
s = s+1
return
def search(self, key):
s = before(key)
s.next()
if s.is_header():
return None
c = s.compare(s.key)
if c != 0:
return None
return s
def before(self, data):
y = self.header;
x = self.header.parent;
while x != None:
if x.compare(data) >= 0:
x = x.left;
else:
y = x;
x = x.right;
return y
def after(self, data):
y = self.header;
x = self.header.parent;
while x != None:
if x.compare(data) > 0:
y = x
x = x.left
else:
x = x.right
return y;
def find(self,data):
root = self.header.parent;
results = array()
while True:
if root is None:
break;
p = self.before(data)
p = p.next()
if not p.is_header():
i = p
l = self.after(data)
while i != l:
results.push(i.key)
i = i.next()
return results
else:
break;
return results
class bag_dictionary:
def __init__(self):
self.bag = bag()
return None
def add(self, key, value):
self.bag.add(key_value(key,value))
return
def remove(self, key):
self.bag.remove(key_value(key,None))
return
def remove_at(self, key, index):
self.bag.remove_at(key_value(key,None), index)
return
def clear(self):
self.bag.header = node()
def __len__(self):
return self.bag.header.parent.length()
def __str__(self):
l = self.bag.header.right;
s =
i = self.bag.header.left;
h = self.bag.header;
while i != h:
s = s +
s = s + i.key.key.__str__()
s = s +
s = s + i.key.value.__str__()
s = s +
if i != l:
s = s +
i = i.next()
s = s +
return s;
def __iter__(self):
self.bag.node = self.bag.header
return self
def __next__(self):
self.bag.node = self.bag.node.next()
if self.bag.node.is_header():
raise StopIteration
return key_value(self.bag.node.key.key,self.bag.node.key.value)
def __getitem__(self, key):
kv_array = self.bag.find(key_value(key,None))
return kv_array
def __setitem__(self, key, value):
self.add(key,value)
return
def __delitem__(self, key):
self.bag.remove(key_value(key,None))
class unordered_set:
def __init__(self):
self.bag_dictionary = bag_dictionary()
def __len__(self):
return self.bag_dictionary.__len__()
def __hash__(self):
h = 0
for i in self:
h = h + i.__hash__()
return h
def __eq__(self, other):
for t in self:
if not other.contains(t):
return False
for u in other:
if self.contains(u):
return False
return true;
def __ne__(self, other):
return not self == other
def __or__(self, other):
r = unordered_set()
for t in self:
r.add(t);
for u in other:
if not self.contains(u):
r.add(u);
return r
def __and__(self, other):
r = unordered_set()
for t in self:
if other.contains(t):
r.add(t)
for u in other:
if self.contains(u) and not r.contains(u):
r.add(u);
return r
def __xor__(self, other):
r = unordered_set()
for t in self:
if not other.contains(t):
r.add(t)
for u in other:
if not self.contains(u) and not r.contains(u):
r.add(u)
return r
def __sub__(self, other):
r = ordered_set()
for t in self:
if not other.contains(t):
r.add(t);
return r
def __lshift__(self, data):
self.add(data)
return self
def __rshift__(self, data):
self.remove(data)
return self
def __getitem__(self, key):
return self.contains(key)
def is_subset(self, other):
is_subet = True
for t in self:
if not other.contains(t):
subset = False
break
return is_subet
def is_superset(self,other):
return other.is_subset(self)
def add(self, value):
if not self.contains(value):
self.bag_dictionary.add(hash(value),value)
else:
raise entry_already_exists()
def contains(self, data):
if self.bag_dictionary.bag.header.parent == None:
return False;
else:
index = hash(data);
_search = self.bag_dictionary.bag.header.parent;
search_index = _search.key.key;
if index < search_index:
_search = _search.left
elif index > search_index:
_search = _search.right
if _search == None:
return False
while _search != None:
search_index = _search.key.key;
if index < search_index:
_search = _search.left
elif index > search_index:
_search = _search.right
else:
break
if _search == None:
return False
return self.contains_node(data, _search)
def contains_node(self,data,_node):
previous = _node.previous()
save = _node
while not previous.is_header() and previous.key.key == _node.key.key:
save = previous;
previous = previous.previous()
c = _node.key.value
_node = save
if c == data:
return True
next = _node.next()
while not next.is_header() and next.key.key == _node.key.key:
_node = next
c = _node.key.value
if c == data:
return True;
next = _node.next()
return False;
def find(self,data,_node):
previous = _node.previous()
save = _node
while not previous.is_header() and previous.key.key == _node.key.key:
save = previous;
previous = previous.previous();
_node = save;
c = _node.key.value
if c == data:
return _node
next = _node.next()
while not next.is_header() and next.key.key == _node.key.key:
_node = next
c = _node.data.value
if c == data:
return _node
next = _node.next()
return None
def search(self, data):
if self.bag_dictionary.bag.header.parent == None:
return None
else:
index = hash(data)
_search = self.bag_dictionary.bag.header.parent
c = _search.key.key
if index < c:
_search = _search.left;
elif index > c:
_search = _search.right;
while _search != None:
if index != c:
break
c = _search.key.key
if index < c:
_search = _search.left;
elif index > c:
_search = _search.right;
else:
break
if _search == None:
return None
return self.find(data, _search)
def remove(self,data):
found = self.search(data);
if found != None:
self.bag_dictionary.bag.remove_node(found);
else:
raise entry_not_found()
def clear(self):
self.bag_dictionary.bag.header = node()
def __str__(self):
l = self.bag_dictionary.bag.header.right;
s =
i = self.bag_dictionary.bag.header.left;
h = self.bag_dictionary.bag.header;
while i != h:
s = s + i.key.value.__str__()
if i != l:
s = s +
i = i.next()
s = s +
return s;
def __iter__(self):
self.bag_dictionary.bag.node = self.bag_dictionary.bag.header
return self
def __next__(self):
self.bag_dictionary.bag.node = self.bag_dictionary.bag.node.next()
if self.bag_dictionary.bag.node.is_header():
raise StopIteration
return self.bag_dictionary.bag.node.key.value
class map:
def __init__(self):
self.set = unordered_set()
return None
def __len__(self):
return self.set.__len__()
def add(self, key, value):
try:
self.set.remove(key_value(key,None))
except entry_not_found:
pass
self.set.add(key_value(key,value))
return
def remove(self, key):
self.set.remove(key_value(key,None))
return
def clear(self):
self.set.clear()
def __str__(self):
l = self.set.bag_dictionary.bag.header.right;
s =
i = self.set.bag_dictionary.bag.header.left;
h = self.set.bag_dictionary.bag.header;
while i != h:
s = s +
s = s + i.key.value.key.__str__()
s = s +
s = s + i.key.value.value.__str__()
s = s +
if i != l:
s = s +
i = i.next()
s = s +
return s;
def __iter__(self):
self.set.node = self.set.bag_dictionary.bag.header
return self
def __next__(self):
self.set.node = self.set.node.next()
if self.set.node.is_header():
raise StopIteration
return key_value(self.set.node.key.key,self.set.node.key.value)
def __getitem__(self, key):
kv = self.set.find(key_value(key,None))
return kv.value
def __setitem__(self, key, value):
self.add(key,value)
return
def __delitem__(self, key):
self.remove(key) | 1,121AVL tree
| 3python
| lvycv |
(function () {
'use strict'; | 1,117Averages/Pythagorean means
| 10javascript
| bapki |
import java.util.Arrays;
import java.util.concurrent.ThreadLocalRandom;
public class AtomicUpdates {
private static final int NUM_BUCKETS = 10;
public static class Buckets {
private final int[] data;
public Buckets(int[] data) {
this.data = data.clone();
}
public int getBucket(int index) {
synchronized (data) {
return data[index];
}
}
public int transfer(int srcIndex, int dstIndex, int amount) {
if (amount < 0)
throw new IllegalArgumentException("negative amount: " + amount);
if (amount == 0)
return 0;
synchronized (data) {
if (data[srcIndex] - amount < 0)
amount = data[srcIndex];
if (data[dstIndex] + amount < 0)
amount = Integer.MAX_VALUE - data[dstIndex];
if (amount < 0)
throw new IllegalStateException();
data[srcIndex] -= amount;
data[dstIndex] += amount;
return amount;
}
}
public int[] getBuckets() {
synchronized (data) {
return data.clone();
}
}
}
private static long getTotal(int[] values) {
long total = 0;
for (int value : values) {
total += value;
}
return total;
}
public static void main(String[] args) {
ThreadLocalRandom rnd = ThreadLocalRandom.current();
int[] values = new int[NUM_BUCKETS];
for (int i = 0; i < values.length; i++)
values[i] = rnd.nextInt() & Integer.MAX_VALUE;
System.out.println("Initial Array: " + getTotal(values) + " " + Arrays.toString(values));
Buckets buckets = new Buckets(values);
new Thread(() -> equalize(buckets), "equalizer").start();
new Thread(() -> transferRandomAmount(buckets), "transferrer").start();
new Thread(() -> print(buckets), "printer").start();
}
private static void transferRandomAmount(Buckets buckets) {
ThreadLocalRandom rnd = ThreadLocalRandom.current();
while (true) {
int srcIndex = rnd.nextInt(NUM_BUCKETS);
int dstIndex = rnd.nextInt(NUM_BUCKETS);
int amount = rnd.nextInt() & Integer.MAX_VALUE;
buckets.transfer(srcIndex, dstIndex, amount);
}
}
private static void equalize(Buckets buckets) {
ThreadLocalRandom rnd = ThreadLocalRandom.current();
while (true) {
int srcIndex = rnd.nextInt(NUM_BUCKETS);
int dstIndex = rnd.nextInt(NUM_BUCKETS);
int amount = (buckets.getBucket(srcIndex) - buckets.getBucket(dstIndex)) / 2;
if (amount >= 0)
buckets.transfer(srcIndex, dstIndex, amount);
}
}
private static void print(Buckets buckets) {
while (true) {
long nextPrintTime = System.currentTimeMillis() + 3000;
long now;
while ((now = System.currentTimeMillis()) < nextPrintTime) {
try {
Thread.sleep(nextPrintTime - now);
} catch (InterruptedException e) {
return;
}
}
int[] bucketValues = buckets.getBuckets();
System.out.println("Current values: " + getTotal(bucketValues) + " " + Arrays.toString(bucketValues));
}
}
} | 1,126Atomic updates
| 9java
| exra5 |
package main
func main() {
x := 43
if x != 42 {
panic(42)
}
} | 1,130Assertions
| 0go
| s8rqa |
def checkTheAnswer = {
assert it == 42: "This: " + it + " is not the answer!"
} | 1,130Assertions
| 7groovy
| awv1p |
public class DigitalFilter {
private static double[] filter(double[] a, double[] b, double[] signal) {
double[] result = new double[signal.length];
for (int i = 0; i < signal.length; ++i) {
double tmp = 0.0;
for (int j = 0; j < b.length; ++j) {
if (i - j < 0) continue;
tmp += b[j] * signal[i - j];
}
for (int j = 1; j < a.length; ++j) {
if (i - j < 0) continue;
tmp -= a[j] * result[i - j];
}
tmp /= a[0];
result[i] = tmp;
}
return result;
}
public static void main(String[] args) {
double[] a = new double[]{1.00000000, -2.77555756e-16, 3.33333333e-01, -1.85037171e-17};
double[] b = new double[]{0.16666667, 0.5, 0.5, 0.16666667};
double[] signal = new double[]{
-0.917843918645, 0.141984778794, 1.20536903482, 0.190286794412,
-0.662370894973, -1.00700480494, -0.404707073677, 0.800482325044,
0.743500089861, 1.01090520172, 0.741527555207, 0.277841675195,
0.400833448236, -0.2085993586, -0.172842103641, -0.134316096293,
0.0259303398477, 0.490105989562, 0.549391221511, 0.9047198589
};
double[] result = filter(a, b, signal);
for (int i = 0; i < result.length; ++i) {
System.out.printf("% .8f", result[i]);
System.out.print((i + 1) % 5 != 0 ? ", " : "\n");
}
}
} | 1,131Apply a digital filter (direct form II transposed)
| 9java
| z6atq |
from __future__ import division
from math import factorial
from random import randrange
MAX_N = 20
TIMES = 1000000
def analytical(n):
return sum(factorial(n) / pow(n, i) / factorial(n -i) for i in range(1, n+1))
def test(n, times):
count = 0
for i in range(times):
x, bits = 1, 0
while not (bits & x):
count += 1
bits |= x
x = 1 << randrange(n)
return count / times
if __name__ == '__main__':
print()
for n in range(1, MAX_N+1):
avg = test(n, TIMES)
theory = analytical(n)
diff = (avg / theory - 1) * 100
print(% (n, avg, theory, diff)) | 1,123Average loop length
| 3python
| parbm |
expected <- function(size) {
result <- 0
for (i in 1:size) {
result <- result + factorial(size) / size^i / factorial(size -i)
}
result
}
knuth <- function(size) {
v <- sample(1:size, size, replace = TRUE)
visit <- vector('logical',size)
place <- 1
visit[[1]] <- TRUE
steps <- 0
repeat {
place <- v[[place]]
steps <- steps + 1
if (visit[[place]]) break
visit[[place]] <- TRUE
}
steps
}
cat(" N average analytical (error)\n")
cat("=== ========= ============ ==========\n")
for (num in 1:20) {
average <- mean(replicate(1e6, knuth(num)))
analytical <- expected(num)
error <- abs(average/analytical-1)*100
cat(sprintf("%3d%11.4f%14.4f (%4.4f%%)\n", num, round(average,4), round(analytical,4), round(error,2)))
} | 1,123Average loop length
| 13r
| jku78 |
class MovingAverage(period: Int) {
private var queue = new scala.collection.mutable.Queue[Double]()
def apply(n: Double) = {
queue.enqueue(n)
if (queue.size > period)
queue.dequeue
queue.sum / queue.size
}
override def toString = queue.mkString("(", ", ", ")")+", period "+period+", average "+(queue.sum / queue.size)
def clear = queue.clear
} | 1,115Averages/Simple moving average
| 16scala
| baak6 |
class BalancedTernary:
str2dig = {'+': 1, '-': -1, '0': 0}
dig2str = {1: '+', -1: '-', 0: '0'}
table = ((0, -1), (1, -1), (-1, 0), (0, 0), (1, 0), (-1, 1), (0, 1))
def __init__(self, inp):
if isinstance(inp, str):
self.digits = [BalancedTernary.str2dig[c] for c in reversed(inp)]
elif isinstance(inp, int):
self.digits = self._int2ternary(inp)
elif isinstance(inp, BalancedTernary):
self.digits = list(inp.digits)
elif isinstance(inp, list):
if all(d in (0, 1, -1) for d in inp):
self.digits = list(inp)
else:
raise ValueError()
else:
raise TypeError()
@staticmethod
def _int2ternary(n):
if n == 0: return []
if (n% 3) == 0: return [0] + BalancedTernary._int2ternary(n
if (n% 3) == 1: return [1] + BalancedTernary._int2ternary(n
if (n% 3) == 2: return [-1] + BalancedTernary._int2ternary((n + 1)
def to_int(self):
return reduce(lambda y,x: x + 3 * y, reversed(self.digits), 0)
def __repr__(self):
if not self.digits: return
return .join(BalancedTernary.dig2str[d] for d in reversed(self.digits))
@staticmethod
def _neg(digs):
return [-d for d in digs]
def __neg__(self):
return BalancedTernary(BalancedTernary._neg(self.digits))
@staticmethod
def _add(a, b, c=0):
if not (a and b):
if c == 0:
return a or b
else:
return BalancedTernary._add([c], a or b)
else:
(d, c) = BalancedTernary.table[3 + (a[0] if a else 0) + (b[0] if b else 0) + c]
res = BalancedTernary._add(a[1:], b[1:], c)
if res or d != 0:
return [d] + res
else:
return res
def __add__(self, b):
return BalancedTernary(BalancedTernary._add(self.digits, b.digits))
def __sub__(self, b):
return self + (-b)
@staticmethod
def _mul(a, b):
if not (a and b):
return []
else:
if a[0] == -1: x = BalancedTernary._neg(b)
elif a[0] == 0: x = []
elif a[0] == 1: x = b
else: assert False
y = [0] + BalancedTernary._mul(a[1:], b)
return BalancedTernary._add(x, y)
def __mul__(self, b):
return BalancedTernary(BalancedTernary._mul(self.digits, b.digits))
def main():
a = BalancedTernary()
print , a.to_int(), a
b = BalancedTernary(-436)
print , b.to_int(), b
c = BalancedTernary()
print , c.to_int(), c
r = a * (b - c)
print , r.to_int(), r
main() | 1,119Balanced ternary
| 3python
| 4ru5k |
use strict;
use warnings;
sub is_close {
my($a,$b,$eps) = @_;
$eps //= 15;
my $epse = $eps;
$epse++ if sprintf("%.${eps}f",$a) =~ /\./;
$epse++ if sprintf("%.${eps}f",$a) =~ /\-/;
my $afmt = substr((sprintf "%.${eps}f", $a), 0, $epse);
my $bfmt = substr((sprintf "%.${eps}f", $b), 0, $epse);
printf "%-5s%s %s\n", ($afmt eq $bfmt ? 'True' : 'False'), $afmt, $bfmt;
}
for (
[100000000000000.01, 100000000000000.011],
[100.01, 100.011],
[10000000000000.001 / 10000.0, 1000000000.0000001000],
[0.001, 0.0010000001],
[0.000000000000000000000101, 0.0],
[sqrt(2) * sqrt(2), 2.0],
[-sqrt(2) * sqrt(2), -2.0],
[100000000000000003.0, 100000000000000004.0],
[3.14159265358979323846, 3.14159265358979324]
) {
my($a,$b) = @$_;
is_close($a,$b);
}
print "\nTolerance may be adjusted.\n";
my $real_pi = 2 * atan2(1, 0);
my $roman_pi = 22/7;
is_close($real_pi,$roman_pi,$_) for <10 3>; | 1,128Approximate equality
| 2perl
| 8ik0w |
int countDivisors(int n) {
int i, count;
if (n < 2) return 1;
count = 2;
for (i = 2; i <= n/2; ++i) {
if (n%i == 0) ++count;
}
return count;
}
int main() {
int n, d, maxDiv = 0, count = 0;
printf();
for (n = 1; count < 20; ++n) {
d = countDivisors(n);
if (d > maxDiv) {
printf(, n);
maxDiv = d;
count++;
}
}
printf();
return 0;
} | 1,135Anti-primes
| 5c
| jkf70 |
null | 1,126Atomic updates
| 11kotlin
| kpvh3 |
import Control.Exception
main = let a = someValue in
assert (a == 42)
somethingElse | 1,130Assertions
| 8haskell
| 9l0mo |
(doseq [[k v] {:a 1,:b 2,:c 3}]
(println k "=" v))
(doseq [k (keys {:a 1,:b 2,:c 3})]
(println k))
(doseq [v (vals {:a 1,:b 2,:c 3})]
(println v)) | 1,134Associative array/Iteration
| 6clojure
| 3ypzr |
null | 1,131Apply a digital filter (direct form II transposed)
| 11kotlin
| idho4 |
num mean(List<num> l) => l.reduce((num p, num n) => p + n) / l.length;
void main(){
print(mean([1,2,3,4,5,6,7]));
} | 1,133Averages/Arithmetic mean
| 18dart
| 6ma34 |
base = { => , => 12.75, => }
update = { => 15.25, => , => 1974}
result = base.merge(update)
p result | 1,127Associative array/Merging
| 14ruby
| onp8v |
use std::collections::HashMap;
fn main() {
let mut original = HashMap::new();
original.insert("name", "Rocket Skates");
original.insert("price", "12.75");
original.insert("color", "yellow");
let mut update = HashMap::new();
update.insert("price", "15.25");
update.insert("color", "red");
update.insert("year", "1974");
original.extend(&update);
println!("{:#?}", original);
} | 1,127Associative array/Merging
| 15rust
| id1od |
null | 1,124Attractive numbers
| 11kotlin
| b14kb |
use strict;
use warnings;
use POSIX 'fmod';
use Math::Complex;
use List::Util qw(sum);
use utf8;
use constant => 2 * 3.1415926535;
sub tod2rad {
($h,$m,$s) = split /:/, @_[0];
(3600*$h + 60*$m + $s) * / 86400;
}
sub rad2tod {
my $x = $_[0] * 86400 / ;
sprintf '%02d:%02d:%02d', fm($x/3600,24), fm($x/60,60), fm($x,60);
}
sub fm {
my($n,$b) = @_;
$x = fmod($n,$b);
$x += $b if $x < 0;
}
sub phase { arg($_[0]) }
sub cis { cos($_[0]) + i*sin($_[0]) }
sub mean_time { rad2tod phase sum map { cis tod2rad $_ } @_ }
@times = ("23:00:17", "23:40:20", "00:12:45", "00:17:19");
print mean_time(@times) . " is the mean time of " . join(' ', @times) . "\n"; | 1,120Averages/Mean time of day
| 2perl
| mc3yz |
import scala.collection.mutable
class AVLTree[A](implicit val ordering: Ordering[A]) extends mutable.SortedSet[A] {
if (ordering eq null) throw new NullPointerException("ordering must not be null")
private var _root: AVLNode = _
private var _size = 0
override def size: Int = _size
override def foreach[U](f: A => U): Unit = {
val stack = mutable.Stack[AVLNode]()
var current = root
var done = false
while (!done) {
if (current != null) {
stack.push(current)
current = current.left
} else if (stack.nonEmpty) {
current = stack.pop()
f.apply(current.key)
current = current.right
} else {
done = true
}
}
}
def root: AVLNode = _root
override def isEmpty: Boolean = root == null
override def min[B >: A](implicit cmp: Ordering[B]): A = minNode().key
def minNode(): AVLNode = {
if (root == null) throw new UnsupportedOperationException("empty tree")
var node = root
while (node.left != null) node = node.left
node
}
override def max[B >: A](implicit cmp: Ordering[B]): A = maxNode().key
def maxNode(): AVLNode = {
if (root == null) throw new UnsupportedOperationException("empty tree")
var node = root
while (node.right != null) node = node.right
node
}
def next(node: AVLNode): Option[AVLNode] = {
var successor = node
if (successor != null) {
if (successor.right != null) {
successor = successor.right
while (successor != null && successor.left != null) {
successor = successor.left
}
} else {
successor = node.parent
var n = node
while (successor != null && successor.right == n) {
n = successor
successor = successor.parent
}
}
}
Option(successor)
}
def prev(node: AVLNode): Option[AVLNode] = {
var predecessor = node
if (predecessor != null) {
if (predecessor.left != null) {
predecessor = predecessor.left
while (predecessor != null && predecessor.right != null) {
predecessor = predecessor.right
}
} else {
predecessor = node.parent
var n = node
while (predecessor != null && predecessor.left == n) {
n = predecessor
predecessor = predecessor.parent
}
}
}
Option(predecessor)
}
override def rangeImpl(from: Option[A], until: Option[A]): mutable.SortedSet[A] = ???
override def +=(key: A): AVLTree.this.type = {
insert(key)
this
}
def insert(key: A): AVLNode = {
if (root == null) {
_root = new AVLNode(key)
_size += 1
return root
}
var node = root
var parent: AVLNode = null
var cmp = 0
while (node != null) {
parent = node
cmp = ordering.compare(key, node.key)
if (cmp == 0) return node | 1,121AVL tree
| 15rust
| u4cvj |
n = 0
n = n + 2 until (n*n).modulo(1000000) == 269696
print n | 1,116Babbage problem
| 14ruby
| so8qw |
math.isclose -> bool
a: double
b: double
*
rel_tol: double = 1e-09
maximum difference for being considered , relative to the
magnitude of the input values
abs_tol: double = 0.0
maximum difference for being considered , regardless of the
magnitude of the input values
Determine whether two floating point numbers are close in value.
Return True if a is close in value to b, and False otherwise.
For the values to be considered close, the difference between them
must be smaller than at least one of the tolerances.
-inf, inf and NaN behave similarly to the IEEE 754 Standard. That
is, NaN is not close to anything, even itself. inf and -inf are
only close to themselves. | 1,128Approximate equality
| 3python
| onb81 |
public class Assertions {
public static void main(String[] args) {
int a = 13; | 1,130Assertions
| 9java
| t3af9 |
function check() {
try {
if (isNaN(answer)) throw '$answer is not a number';
if (answer != 42) throw '$answer is not 42';
}
catch(err) {
console.log(err);
answer = 42;
}
finally { console.log(answer); }
}
console.count('try'); | 1,130Assertions
| 10javascript
| mcsyv |
void map(int* array, int len, void(*callback)(int,int)); | 1,136Apply a callback to an array
| 5c
| awy11 |
function filter(b,a,input)
local out = {}
for i=1,table.getn(input) do
local tmp = 0
local j = 0
out[i] = 0
for j=1,table.getn(b) do
if i - j < 0 then | 1,131Apply a digital filter (direct form II transposed)
| 1lua
| nfki8 |
let base: [String: Any] = ["name": "Rocket Skates", "price": 12.75, "color": "yellow"]
let update: [String: Any] = ["price": 15.25, "color": "red", "year": 1974]
let result = base.merging(update) { (_, new) in new }
print(result) | 1,127Associative array/Merging
| 17swift
| 8ib0v |
import scala.collection.mutable
class AVLTree[A](implicit val ordering: Ordering[A]) extends mutable.SortedSet[A] {
if (ordering eq null) throw new NullPointerException("ordering must not be null")
private var _root: AVLNode = _
private var _size = 0
override def size: Int = _size
override def foreach[U](f: A => U): Unit = {
val stack = mutable.Stack[AVLNode]()
var current = root
var done = false
while (!done) {
if (current != null) {
stack.push(current)
current = current.left
} else if (stack.nonEmpty) {
current = stack.pop()
f.apply(current.key)
current = current.right
} else {
done = true
}
}
}
def root: AVLNode = _root
override def isEmpty: Boolean = root == null
override def min[B >: A](implicit cmp: Ordering[B]): A = minNode().key
def minNode(): AVLNode = {
if (root == null) throw new UnsupportedOperationException("empty tree")
var node = root
while (node.left != null) node = node.left
node
}
override def max[B >: A](implicit cmp: Ordering[B]): A = maxNode().key
def maxNode(): AVLNode = {
if (root == null) throw new UnsupportedOperationException("empty tree")
var node = root
while (node.right != null) node = node.right
node
}
def next(node: AVLNode): Option[AVLNode] = {
var successor = node
if (successor != null) {
if (successor.right != null) {
successor = successor.right
while (successor != null && successor.left != null) {
successor = successor.left
}
} else {
successor = node.parent
var n = node
while (successor != null && successor.right == n) {
n = successor
successor = successor.parent
}
}
}
Option(successor)
}
def prev(node: AVLNode): Option[AVLNode] = {
var predecessor = node
if (predecessor != null) {
if (predecessor.left != null) {
predecessor = predecessor.left
while (predecessor != null && predecessor.right != null) {
predecessor = predecessor.right
}
} else {
predecessor = node.parent
var n = node
while (predecessor != null && predecessor.left == n) {
n = predecessor
predecessor = predecessor.parent
}
}
}
Option(predecessor)
}
override def rangeImpl(from: Option[A], until: Option[A]): mutable.SortedSet[A] = ???
override def +=(key: A): AVLTree.this.type = {
insert(key)
this
}
def insert(key: A): AVLNode = {
if (root == null) {
_root = new AVLNode(key)
_size += 1
return root
}
var node = root
var parent: AVLNode = null
var cmp = 0
while (node != null) {
parent = node
cmp = ordering.compare(key, node.key)
if (cmp == 0) return node | 1,121AVL tree
| 16scala
| g7v4i |
sub Pi () { 3.1415926535897932384626433832795028842 }
sub meanangle {
my($x, $y) = (0,0);
($x,$y) = ($x + sin($_), $y + cos($_)) for @_;
my $atan = atan2($x,$y);
$atan += 2*Pi while $atan < 0;
$atan -= 2*Pi while $atan > 2*Pi;
$atan;
}
sub meandegrees {
meanangle( map { $_ * Pi/180 } @_ ) * 180/Pi;
}
print "The mean angle of [@$_] is: ", meandegrees(@$_), " degrees\n"
for ([350,10], [90,180,270,360], [10,20,30]); | 1,122Averages/Mean angle
| 2perl
| 5gcu2 |
fn main() {
let mut current = 0;
while (current * current)% 1_000_000!= 269_696 {
current += 1;
}
println!(
"The smallest number whose square ends in 269696 is {}",
current
);
} | 1,116Babbage problem
| 15rust
| 0iosl |
approxEq <- function(...) isTRUE(all.equal(...))
tests <- rbind(c(100000000000000.01, 100000000000000.011),
c(100.01, 100.011),
c(10000000000000.001 / 10000.0, 1000000000.0000001000),
c(0.001, 0.0010000001),
c(0.000000000000000000000101, 0.0),
c(sqrt(2) * sqrt(2), 2.0),
c(-sqrt(2) * sqrt(2), -2.0),
c(3.14159265358979323846, 3.14159265358979324))
results <- mapply(approxEq, tests[, 1], tests[, 2])
printableTests <- format(tests, scientific = FALSE)
print(data.frame(x = printableTests[, 1], y = printableTests[, 2], Equal = results, row.names = paste0("Test ", 1:8, ": "))) | 1,128Approximate equality
| 13r
| q07xs |
fun main() {
val a = 42
assert(a == 43)
} | 1,130Assertions
| 11kotlin
| onh8z |
class Integer
def factorial
self == 0? 1: (1..self).inject(:*)
end
end
def rand_until_rep(n)
rands = {}
loop do
r = rand(1..n)
return rands.size if rands[r]
rands[r] = true
end
end
runs = 1_000_000
puts ,
(1..20).each do |n|
sum_of_runs = runs.times.inject(0){|sum, _| sum += rand_until_rep(n)}
avg = sum_of_runs / runs.to_f
analytical = (1..n).inject(0){|sum, i| sum += (n.factorial / (n**i).to_f / (n-i).factorial)}
puts % [n, avg, analytical, (avg/analytical - 1)*100]
end | 1,123Average loop length
| 14ruby
| awj1s |
extern crate rand;
use rand::{ThreadRng, thread_rng};
use rand::distributions::{IndependentSample, Range};
use std::collections::HashSet;
use std::env;
use std::process;
fn help() {
println!("usage: average_loop_length <max_N> <trials>");
}
fn main() {
let args: Vec<String> = env::args().collect();
let mut max_n: u32 = 20;
let mut trials: u32 = 1000;
match args.len() {
1 => {}
3 => {
max_n = args[1].parse::<u32>().unwrap();
trials = args[2].parse::<u32>().unwrap();
}
_ => {
help();
process::exit(0);
}
}
let mut rng = thread_rng();
println!(" N average analytical (error)");
println!("=== ========= ============ =========");
for n in 1..(max_n + 1) {
let the_analytical = analytical(n);
let the_empirical = empirical(n, trials, &mut rng);
println!(" {:>2} {:3.4} {:3.4} ( {:>+1.2}%)",
n,
the_empirical,
the_analytical,
100f64 * (the_empirical / the_analytical - 1f64));
}
}
fn factorial(n: u32) -> f64 {
(1..n + 1).fold(1f64, |p, n| p * n as f64)
}
fn analytical(n: u32) -> f64 {
let sum: f64 = (1..(n + 1))
.map(|i| factorial(n) / (n as f64).powi(i as i32) / factorial(n - i))
.fold(0f64, |a, v| a + v);
sum
}
fn empirical(n: u32, trials: u32, rng: &mut ThreadRng) -> f64 {
let sum: f64 = (0..trials)
.map(|_t| {
let mut item = 1u32;
let mut seen = HashSet::new();
let range = Range::new(1u32, n + 1);
for step in 0..n {
if seen.contains(&item) {
return step as f64;
}
seen.insert(item);
item = range.ind_sample(rng);
}
n as f64
})
.fold(0f64, |a, v| a + v);
sum / trials as f64
} | 1,123Average loop length
| 15rust
| exhaj |
null | 1,124Attractive numbers
| 1lua
| pagbw |
<?php
function time2ang($tim) {
if (!is_string($tim)) return $tim;
$parts = explode(':',$tim);
if (count($parts)!=3) return $tim;
$sec = ($parts[0]*3600)+($parts[1]*60)+$parts[2];
$ang = 360.0 * ($sec/86400.0);
return $ang;
}
function ang2time($ang) {
if (!is_numeric($ang)) return $ang;
$sec = 86400.0 * $ang / 360.0;
$parts = array(floor($sec/3600),floor(($sec % 3600)/60),$sec % 60);
$tim = sprintf('%02d:%02d:%02d',$parts[0],$parts[1],$parts[2]);
return $tim;
}
function meanang($ang) {
if (!is_array($ang)) return $ang;
$sins = 0.0;
$coss = 0.0;
foreach($ang as $a) {
$sins += sin(deg2rad($a));
$coss += cos(deg2rad($a));
}
$avgsin = $sins / (0.0+count($ang));
$avgcos = $coss / (0.0+count($ang));
$avgang = rad2deg(atan2($avgsin,$avgcos));
while ($avgang < 0.0) $avgang += 360.0;
return $avgang;
}
$bats = array('23:00:17','23:40:20','00:12:45','00:17:19');
$angs = array();
foreach ($bats as $t) $angs[] = time2ang($t);
$ma = meanang($angs);
$result = ang2time($ma);
print ;
?> | 1,120Averages/Mean time of day
| 12php
| expa9 |
import kotlin.math.round
import kotlin.math.pow
fun Collection<Double>.geometricMean() =
if (isEmpty()) Double.NaN
else (reduce { n1, n2 -> n1 * n2 }).pow(1.0 / size)
fun Collection<Double>.harmonicMean() =
if (isEmpty() || contains(0.0)) Double.NaN
else size / fold(0.0) { n1, n2 -> n1 + 1.0 / n2 }
fun Double.toFixed(len: Int = 6) =
round(this * 10.0.pow(len)) / 10.0.pow(len)
fun main() {
val list = listOf(1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0)
val a = list.average() | 1,117Averages/Pythagorean means
| 11kotlin
| v4u21 |
object BabbageProblem {
def main( args:Array[String] ): Unit = {
var x : Int = 524 | 1,116Babbage problem
| 16scala
| ifdox |
package main
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"os"
)
type pw struct {
account, password string
uid, gid uint
gecos
directory, shell string
}
type gecos struct {
fullname, office, extension, homephone, email string
}
func (p *pw) encode(w io.Writer) (int, error) {
return fmt.Fprintf(w, "%s:%s:%d:%d:%s,%s,%s,%s,%s:%s:%s\n",
p.account, p.password, p.uid, p.gid,
p.fullname, p.office, p.extension, p.homephone, p.email,
p.directory, p.shell)
} | 1,132Append a record to the end of a text file
| 0go
| idjog |
(map inc [1 2 3 4]) | 1,136Apply a callback to an array
| 6clojure
| s82qr |
Subsets and Splits