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Runtime error
Runtime error
File size: 1,600 Bytes
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"use strict";
var indexOf = require("es5-ext/array/#/e-index-of")
, create = Object.create;
module.exports = function (length) {
var lastId = 0, map = [[], []], cache = create(null);
return {
get: function (args) {
var index = 0, set = map, i;
while (index < length - 1) {
i = indexOf.call(set[0], args[index]);
if (i === -1) return null;
set = set[1][i];
++index;
}
i = indexOf.call(set[0], args[index]);
if (i === -1) return null;
return set[1][i] || null;
},
set: function (args) {
var index = 0, set = map, i;
while (index < length - 1) {
i = indexOf.call(set[0], args[index]);
if (i === -1) {
i = set[0].push(args[index]) - 1;
set[1].push([[], []]);
}
set = set[1][i];
++index;
}
i = indexOf.call(set[0], args[index]);
if (i === -1) {
i = set[0].push(args[index]) - 1;
}
set[1][i] = ++lastId;
cache[lastId] = args;
return lastId;
},
delete: function (id) {
var index = 0, set = map, i, path = [], args = cache[id];
while (index < length - 1) {
i = indexOf.call(set[0], args[index]);
if (i === -1) {
return;
}
path.push(set, i);
set = set[1][i];
++index;
}
i = indexOf.call(set[0], args[index]);
if (i === -1) {
return;
}
id = set[1][i];
set[0].splice(i, 1);
set[1].splice(i, 1);
while (!set[0].length && path.length) {
i = path.pop();
set = path.pop();
set[0].splice(i, 1);
set[1].splice(i, 1);
}
delete cache[id];
},
clear: function () {
map = [[], []];
cache = create(null);
}
};
};
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