Sha256: 2cd574890a145de82eaf294293513cf33217a4e98f94da87a6a274e4f068234c
Contents?: true
Size: 2 KB
Versions: 14
Compression:
Stored size: 2 KB
Contents
'use strict';
var indexOf = require('es5-ext/array/#/e-index-of')
, create = Object.create;
module.exports = function () {
var lastId = 0, map = [], cache = create(null);
return {
get: function (args) {
var index = 0, set = map, i, length = args.length;
if (length === 0) return set[length] || null;
if ((set = set[length])) {
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;
}
return null;
},
set: function (args) {
var index = 0, set = map, i, length = args.length;
if (length === 0) {
set[length] = ++lastId;
} else {
if (!set[length]) {
set[length] = [[], []];
}
set = set[length];
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, args = cache[id], length = args.length
, path = [];
if (length === 0) {
delete set[length];
} else if ((set = set[length])) {
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);
}
};
};
Version data entries
14 entries across 7 versions & 1 rubygems