deep-random-pick/src/arrayPick.js

Picks a pseudo-random item from a pool in several ways, including a recursive method that allows for more control over probability.

"use strict";
exports.__esModule = true;
var Alea = require('alea');
exports.arrayPick = function (array) {
    if (array) {
        if (Array.isArray(array)) {
            var prng = new Alea();
            if (array.length < 1 || !array) {
                return null;
            }
            else if (array.length === 1) {
                return array[0];
            }
            else {
                return array[Math.round(prng() * (array.length - 1))];
            }
        }
        else {
            return array;
        }
    }
    else {
        return null;
    }
};