id
int64 1
10k
| question
stringclasses 10
values | solution
stringclasses 10
values | difficulty
stringclasses 3
values | topic
stringclasses 5
values |
|---|---|---|---|---|
8,901 | Write a function that finds even numbers in an array. | function findEven(arr) {
return arr.filter(num => num % 2 === 0);
} | easy | loops |
8,902 | Write a function that removes duplicates from an array. | function removeDuplicates(arr) {
return [...new Set(arr)];
} | medium | arrays |
8,903 | Write a function that reverses a string. | function reverseString(s) {
return s.split('').reverse().join('');
} | medium | strings |
8,904 | Write a function that checks if a string is a palindrome. | function isPalindrome(s) {
return s === s.split('').reverse().join('');
} | medium | strings |
8,905 | Write a function that removes duplicates from an array. | function removeDuplicates(arr) {
return [...new Set(arr)];
} | easy | arrays |
8,906 | Write a function that removes duplicates from an array. | function removeDuplicates(arr) {
return [...new Set(arr)];
} | medium | arrays |
8,907 | Write a function that finds even numbers in an array. | function findEven(arr) {
return arr.filter(num => num % 2 === 0);
} | easy | loops |
8,908 | Write a function that checks if a number is prime. | function isPrime(n) {
if (n <= 1) return false;
for (let i = 2; i * i <= n; i++) {
if (n % i === 0) return false;
}
return true;
} | medium | math |
8,909 | Write a recursive function to sum an array. | function sumArrayRec(arr, index = 0) {
if (index >= arr.length) return 0;
return arr[index] + sumArrayRec(arr, index + 1);
} | medium | recursion |
8,910 | Write a function that finds even numbers in an array. | function findEven(arr) {
return arr.filter(num => num % 2 === 0);
} | easy | loops |
8,911 | Write a function that returns the sum of an array. | function sumArray(arr) {
return arr.reduce((a, b) => a + b, 0);
} | easy | arrays |
8,912 | Write a function that reverses a string. | function reverseString(s) {
return s.split('').reverse().join('');
} | easy | strings |
8,913 | Write a recursive function to compute Fibonacci numbers. | function fibonacci(n) {
if (n <= 1) return n;
return fibonacci(n - 1) + fibonacci(n - 2);
} | easy | recursion |
8,914 | Write a function that prints numbers from 1 to 100. | function printNumbers() {
for (let i = 1; i <= 100; i++) {
console.log(i);
}
} | easy | loops |
8,915 | Write a function that reverses a string. | function reverseString(s) {
return s.split('').reverse().join('');
} | easy | strings |
8,916 | Write a function that returns the factorial of a number. | function factorial(n) {
if (n === 0) return 1;
return n * factorial(n - 1);
} | medium | math |
8,917 | Write a function that checks if a number is prime. | function isPrime(n) {
if (n <= 1) return false;
for (let i = 2; i * i <= n; i++) {
if (n % i === 0) return false;
}
return true;
} | medium | math |
8,918 | Write a function that reverses a string. | function reverseString(s) {
return s.split('').reverse().join('');
} | medium | strings |
8,919 | Write a function that removes duplicates from an array. | function removeDuplicates(arr) {
return [...new Set(arr)];
} | easy | arrays |
8,920 | Write a function that returns the sum of an array. | function sumArray(arr) {
return arr.reduce((a, b) => a + b, 0);
} | easy | arrays |
8,921 | Write a function that prints numbers from 1 to 100. | function printNumbers() {
for (let i = 1; i <= 100; i++) {
console.log(i);
}
} | hard | loops |
8,922 | Write a function that returns the factorial of a number. | function factorial(n) {
if (n === 0) return 1;
return n * factorial(n - 1);
} | easy | math |
8,923 | Write a function that prints numbers from 1 to 100. | function printNumbers() {
for (let i = 1; i <= 100; i++) {
console.log(i);
}
} | easy | loops |
8,924 | Write a function that prints numbers from 1 to 100. | function printNumbers() {
for (let i = 1; i <= 100; i++) {
console.log(i);
}
} | easy | loops |
8,925 | Write a recursive function to sum an array. | function sumArrayRec(arr, index = 0) {
if (index >= arr.length) return 0;
return arr[index] + sumArrayRec(arr, index + 1);
} | easy | recursion |
8,926 | Write a recursive function to compute Fibonacci numbers. | function fibonacci(n) {
if (n <= 1) return n;
return fibonacci(n - 1) + fibonacci(n - 2);
} | hard | recursion |
8,927 | Write a function that reverses a string. | function reverseString(s) {
return s.split('').reverse().join('');
} | easy | strings |
8,928 | Write a function that removes duplicates from an array. | function removeDuplicates(arr) {
return [...new Set(arr)];
} | easy | arrays |
8,929 | Write a function that prints numbers from 1 to 100. | function printNumbers() {
for (let i = 1; i <= 100; i++) {
console.log(i);
}
} | easy | loops |
8,930 | Write a function that returns the sum of an array. | function sumArray(arr) {
return arr.reduce((a, b) => a + b, 0);
} | easy | arrays |
8,931 | Write a function that removes duplicates from an array. | function removeDuplicates(arr) {
return [...new Set(arr)];
} | easy | arrays |
8,932 | Write a function that checks if a string is a palindrome. | function isPalindrome(s) {
return s === s.split('').reverse().join('');
} | easy | strings |
8,933 | Write a function that removes duplicates from an array. | function removeDuplicates(arr) {
return [...new Set(arr)];
} | easy | arrays |
8,934 | Write a function that removes duplicates from an array. | function removeDuplicates(arr) {
return [...new Set(arr)];
} | easy | arrays |
8,935 | Write a function that finds even numbers in an array. | function findEven(arr) {
return arr.filter(num => num % 2 === 0);
} | easy | loops |
8,936 | Write a function that checks if a string is a palindrome. | function isPalindrome(s) {
return s === s.split('').reverse().join('');
} | hard | strings |
8,937 | Write a function that reverses a string. | function reverseString(s) {
return s.split('').reverse().join('');
} | easy | strings |
8,938 | Write a function that removes duplicates from an array. | function removeDuplicates(arr) {
return [...new Set(arr)];
} | hard | arrays |
8,939 | Write a function that reverses a string. | function reverseString(s) {
return s.split('').reverse().join('');
} | medium | strings |
8,940 | Write a recursive function to compute Fibonacci numbers. | function fibonacci(n) {
if (n <= 1) return n;
return fibonacci(n - 1) + fibonacci(n - 2);
} | medium | recursion |
8,941 | Write a recursive function to sum an array. | function sumArrayRec(arr, index = 0) {
if (index >= arr.length) return 0;
return arr[index] + sumArrayRec(arr, index + 1);
} | easy | recursion |
8,942 | Write a function that checks if a number is prime. | function isPrime(n) {
if (n <= 1) return false;
for (let i = 2; i * i <= n; i++) {
if (n % i === 0) return false;
}
return true;
} | easy | math |
8,943 | Write a function that checks if a string is a palindrome. | function isPalindrome(s) {
return s === s.split('').reverse().join('');
} | easy | strings |
8,944 | Write a function that removes duplicates from an array. | function removeDuplicates(arr) {
return [...new Set(arr)];
} | easy | arrays |
8,945 | Write a function that checks if a number is prime. | function isPrime(n) {
if (n <= 1) return false;
for (let i = 2; i * i <= n; i++) {
if (n % i === 0) return false;
}
return true;
} | medium | math |
8,946 | Write a function that prints numbers from 1 to 100. | function printNumbers() {
for (let i = 1; i <= 100; i++) {
console.log(i);
}
} | easy | loops |
8,947 | Write a function that checks if a string is a palindrome. | function isPalindrome(s) {
return s === s.split('').reverse().join('');
} | medium | strings |
8,948 | Write a function that reverses a string. | function reverseString(s) {
return s.split('').reverse().join('');
} | hard | strings |
8,949 | Write a function that removes duplicates from an array. | function removeDuplicates(arr) {
return [...new Set(arr)];
} | medium | arrays |
8,950 | Write a recursive function to sum an array. | function sumArrayRec(arr, index = 0) {
if (index >= arr.length) return 0;
return arr[index] + sumArrayRec(arr, index + 1);
} | hard | recursion |
8,951 | Write a recursive function to sum an array. | function sumArrayRec(arr, index = 0) {
if (index >= arr.length) return 0;
return arr[index] + sumArrayRec(arr, index + 1);
} | medium | recursion |
8,952 | Write a recursive function to compute Fibonacci numbers. | function fibonacci(n) {
if (n <= 1) return n;
return fibonacci(n - 1) + fibonacci(n - 2);
} | easy | recursion |
8,953 | Write a function that removes duplicates from an array. | function removeDuplicates(arr) {
return [...new Set(arr)];
} | medium | arrays |
8,954 | Write a function that checks if a number is prime. | function isPrime(n) {
if (n <= 1) return false;
for (let i = 2; i * i <= n; i++) {
if (n % i === 0) return false;
}
return true;
} | medium | math |
8,955 | Write a function that checks if a number is prime. | function isPrime(n) {
if (n <= 1) return false;
for (let i = 2; i * i <= n; i++) {
if (n % i === 0) return false;
}
return true;
} | easy | math |
8,956 | Write a function that checks if a number is prime. | function isPrime(n) {
if (n <= 1) return false;
for (let i = 2; i * i <= n; i++) {
if (n % i === 0) return false;
}
return true;
} | medium | math |
8,957 | Write a function that returns the factorial of a number. | function factorial(n) {
if (n === 0) return 1;
return n * factorial(n - 1);
} | medium | math |
8,958 | Write a recursive function to sum an array. | function sumArrayRec(arr, index = 0) {
if (index >= arr.length) return 0;
return arr[index] + sumArrayRec(arr, index + 1);
} | easy | recursion |
8,959 | Write a function that checks if a number is prime. | function isPrime(n) {
if (n <= 1) return false;
for (let i = 2; i * i <= n; i++) {
if (n % i === 0) return false;
}
return true;
} | easy | math |
8,960 | Write a recursive function to sum an array. | function sumArrayRec(arr, index = 0) {
if (index >= arr.length) return 0;
return arr[index] + sumArrayRec(arr, index + 1);
} | medium | recursion |
8,961 | Write a recursive function to compute Fibonacci numbers. | function fibonacci(n) {
if (n <= 1) return n;
return fibonacci(n - 1) + fibonacci(n - 2);
} | easy | recursion |
8,962 | Write a recursive function to sum an array. | function sumArrayRec(arr, index = 0) {
if (index >= arr.length) return 0;
return arr[index] + sumArrayRec(arr, index + 1);
} | easy | recursion |
8,963 | Write a recursive function to compute Fibonacci numbers. | function fibonacci(n) {
if (n <= 1) return n;
return fibonacci(n - 1) + fibonacci(n - 2);
} | hard | recursion |
8,964 | Write a function that finds even numbers in an array. | function findEven(arr) {
return arr.filter(num => num % 2 === 0);
} | easy | loops |
8,965 | Write a function that finds even numbers in an array. | function findEven(arr) {
return arr.filter(num => num % 2 === 0);
} | easy | loops |
8,966 | Write a recursive function to sum an array. | function sumArrayRec(arr, index = 0) {
if (index >= arr.length) return 0;
return arr[index] + sumArrayRec(arr, index + 1);
} | hard | recursion |
8,967 | Write a function that returns the sum of an array. | function sumArray(arr) {
return arr.reduce((a, b) => a + b, 0);
} | easy | arrays |
8,968 | Write a function that returns the sum of an array. | function sumArray(arr) {
return arr.reduce((a, b) => a + b, 0);
} | medium | arrays |
8,969 | Write a recursive function to compute Fibonacci numbers. | function fibonacci(n) {
if (n <= 1) return n;
return fibonacci(n - 1) + fibonacci(n - 2);
} | hard | recursion |
8,970 | Write a function that returns the factorial of a number. | function factorial(n) {
if (n === 0) return 1;
return n * factorial(n - 1);
} | easy | math |
8,971 | Write a function that returns the factorial of a number. | function factorial(n) {
if (n === 0) return 1;
return n * factorial(n - 1);
} | easy | math |
8,972 | Write a function that checks if a string is a palindrome. | function isPalindrome(s) {
return s === s.split('').reverse().join('');
} | medium | strings |
8,973 | Write a function that checks if a string is a palindrome. | function isPalindrome(s) {
return s === s.split('').reverse().join('');
} | easy | strings |
8,974 | Write a function that reverses a string. | function reverseString(s) {
return s.split('').reverse().join('');
} | medium | strings |
8,975 | Write a function that returns the factorial of a number. | function factorial(n) {
if (n === 0) return 1;
return n * factorial(n - 1);
} | medium | math |
8,976 | Write a function that removes duplicates from an array. | function removeDuplicates(arr) {
return [...new Set(arr)];
} | easy | arrays |
8,977 | Write a function that removes duplicates from an array. | function removeDuplicates(arr) {
return [...new Set(arr)];
} | hard | arrays |
8,978 | Write a function that returns the factorial of a number. | function factorial(n) {
if (n === 0) return 1;
return n * factorial(n - 1);
} | medium | math |
8,979 | Write a function that removes duplicates from an array. | function removeDuplicates(arr) {
return [...new Set(arr)];
} | easy | arrays |
8,980 | Write a recursive function to compute Fibonacci numbers. | function fibonacci(n) {
if (n <= 1) return n;
return fibonacci(n - 1) + fibonacci(n - 2);
} | easy | recursion |
8,981 | Write a function that returns the factorial of a number. | function factorial(n) {
if (n === 0) return 1;
return n * factorial(n - 1);
} | medium | math |
8,982 | Write a function that checks if a string is a palindrome. | function isPalindrome(s) {
return s === s.split('').reverse().join('');
} | hard | strings |
8,983 | Write a function that prints numbers from 1 to 100. | function printNumbers() {
for (let i = 1; i <= 100; i++) {
console.log(i);
}
} | easy | loops |
8,984 | Write a function that returns the sum of an array. | function sumArray(arr) {
return arr.reduce((a, b) => a + b, 0);
} | easy | arrays |
8,985 | Write a recursive function to compute Fibonacci numbers. | function fibonacci(n) {
if (n <= 1) return n;
return fibonacci(n - 1) + fibonacci(n - 2);
} | easy | recursion |
8,986 | Write a function that checks if a string is a palindrome. | function isPalindrome(s) {
return s === s.split('').reverse().join('');
} | easy | strings |
8,987 | Write a recursive function to sum an array. | function sumArrayRec(arr, index = 0) {
if (index >= arr.length) return 0;
return arr[index] + sumArrayRec(arr, index + 1);
} | easy | recursion |
8,988 | Write a function that returns the factorial of a number. | function factorial(n) {
if (n === 0) return 1;
return n * factorial(n - 1);
} | hard | math |
8,989 | Write a function that finds even numbers in an array. | function findEven(arr) {
return arr.filter(num => num % 2 === 0);
} | easy | loops |
8,990 | Write a recursive function to sum an array. | function sumArrayRec(arr, index = 0) {
if (index >= arr.length) return 0;
return arr[index] + sumArrayRec(arr, index + 1);
} | easy | recursion |
8,991 | Write a function that checks if a number is prime. | function isPrime(n) {
if (n <= 1) return false;
for (let i = 2; i * i <= n; i++) {
if (n % i === 0) return false;
}
return true;
} | medium | math |
8,992 | Write a function that removes duplicates from an array. | function removeDuplicates(arr) {
return [...new Set(arr)];
} | easy | arrays |
8,993 | Write a function that returns the factorial of a number. | function factorial(n) {
if (n === 0) return 1;
return n * factorial(n - 1);
} | easy | math |
8,994 | Write a function that checks if a string is a palindrome. | function isPalindrome(s) {
return s === s.split('').reverse().join('');
} | medium | strings |
8,995 | Write a function that returns the sum of an array. | function sumArray(arr) {
return arr.reduce((a, b) => a + b, 0);
} | easy | arrays |
8,996 | Write a function that prints numbers from 1 to 100. | function printNumbers() {
for (let i = 1; i <= 100; i++) {
console.log(i);
}
} | easy | loops |
8,997 | Write a function that reverses a string. | function reverseString(s) {
return s.split('').reverse().join('');
} | easy | strings |
8,998 | Write a function that reverses a string. | function reverseString(s) {
return s.split('').reverse().join('');
} | medium | strings |
8,999 | Write a function that reverses a string. | function reverseString(s) {
return s.split('').reverse().join('');
} | easy | strings |
9,000 | Write a function that returns the sum of an array. | function sumArray(arr) {
return arr.reduce((a, b) => a + b, 0);
} | easy | arrays |
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