mirror of
https://github.com/mgerb/mywebsite
synced 2026-01-12 10:52:47 +00:00
24 lines
559 B
JavaScript
24 lines
559 B
JavaScript
// Inspired by Underscore's groupBy:
|
|
// http://documentcloud.github.com/underscore/#groupBy
|
|
|
|
'use strict';
|
|
|
|
var callable = require('../../object/valid-callable')
|
|
, value = require('../../object/valid-value')
|
|
|
|
, forEach = Array.prototype.forEach, apply = Function.prototype.apply;
|
|
|
|
module.exports = function (cb/*, thisArg*/) {
|
|
var r;
|
|
|
|
(value(this) && callable(cb));
|
|
|
|
r = {};
|
|
forEach.call(this, function (v) {
|
|
var key = apply.call(cb, this, arguments);
|
|
if (!r.hasOwnProperty(key)) r[key] = [];
|
|
r[key].push(v);
|
|
}, arguments[1]);
|
|
return r;
|
|
};
|