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/home/yanggyein/yanggyein/yang_ai/node_modules/es5-ext/array/#/group.js
// 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 result; value(this); callable(cb); result = Object.create(null); forEach.call( this, function (item) { var key = apply.call(cb, this, arguments); if (!result[key]) result[key] = []; result[key].push(item); }, arguments[1] ); return result; };