qms-js/lib/extensions/array.js

A common library that can be used for fe and be

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var helper_1 = require("../common/helper");
Array.prototype.groupBy = function (groupFunc) {
    var map = new Map();
    this.forEach(function (item) {
        var key = groupFunc(item);
        var collection = map.get(key);
        if (!collection) {
            map.set(key, [item]);
        }
        else {
            collection.push(item);
        }
    });
    return map;
};
Array.prototype.merge = function (keyFunc, newItems, mergeFunc) {
    var _this = this;
    newItems.forEach(function (item) {
        var key = keyFunc(item);
        var cur = _this.find(function (i) { return keyFunc(i) == key; });
        if (!cur)
            _this.push(item);
        if (key && mergeFunc && cur) {
            mergeFunc(cur, item);
        }
    });
};
Array.prototype.shuffle = function () {
    if (this.length < 2)
        return this;
    for (var i = this.length - 1; i > 0; i--) {
        var j = Math.floor(Math.random() * (i + 1));
        var temp = this[i];
        this[i] = this[j];
        this[j] = temp;
    }
    return this;
};
Array.prototype.random = function () {
    var i = helper_1.default.randomNumber(0, this.length - 1);
    var item = this[i];
    return item;
};
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