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udia

0.1.1
0.1.3 0.1.2 retired 0.1.1 retired 0.1.0 0.0.1

A web application in pursuit of meaning in life.

Retired package: Complete rewrite, scratch old versions
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udia assets node_modules mout array groupBy.js
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assets/node_modules/mout/array/groupBy.js 

var forEach = require('../array/forEach');

var identity = require('../function/identity');

var makeIterator = require('../function/makeIterator_');



    /**

     * Bucket the array values.

     */

    function groupBy(arr, categorize, thisObj) {

        if (categorize) {

            categorize = makeIterator(categorize, thisObj);

        } else {

            // Default to identity function.

            categorize = identity;

        }



        var buckets = {};

        forEach(arr, function(element) {

            var bucket = categorize(element);

            if (!(bucket in buckets)) {

                buckets[bucket] = [];

            }



            buckets[bucket].push(element);

        });



        return buckets;

    }



    module.exports = groupBy;