35 lines
951 B
JavaScript
35 lines
951 B
JavaScript
'use strict';
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/* Utilities for random numbers. */
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// From https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/random
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function getRandomInt(max) {
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return Math.floor(Math.random() * Math.floor(max));
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}
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function getRandomBool() {
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return getRandomInt(2) == 1;
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}
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function getRandomLetter() {
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return (10 + getRandomInt(26)).toString(36);
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}
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// From https://stackoverflow.com/a/2450976
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function shuffle(array) {
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let currentIndex = array.length, temporaryValue, randomIndex;
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// While there remain elements to shuffle...
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while (0 !== currentIndex) {
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// Pick a remaining element...
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randomIndex = Math.floor(Math.random() * currentIndex);
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currentIndex -= 1;
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// And swap it with the current element.
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temporaryValue = array[currentIndex];
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array[currentIndex] = array[randomIndex];
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array[randomIndex] = temporaryValue;
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}
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return array;
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}
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