66 lines
1.3 KiB
JavaScript
66 lines
1.3 KiB
JavaScript
export default let roll = (function () {
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/**
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* Randomly shuffle an array
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* https://stackoverflow.com/a/2450976/1293256
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* @param {Array} array The array to shuffle
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* @return {Array} The shuffled array
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*/
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function shuffle (array) {
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let currentIndex = array.length;
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let 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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function createDice ( numSides ) {
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let array = [];
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for (let n = 0; n < numSides; n++) {
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array.push(n+1);
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}
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return array;
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}
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function d2() {
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return shuffle(createDice(2))[0];
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}
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function d4() {
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return shuffle(createDice(4))[0];
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}
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function d6() {
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return shuffle(createDice(6))[0];
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}
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function d8() {
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return shuffle(createDice(8))[0];
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}
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function d10() {
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return shuffle(createDice(10))[0];
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}
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function d12() {
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return shuffle(createDice(12))[0];
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}
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function d20() {
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return shuffle(createDice(20))[0];
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}
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return {d2, d4, d6, d8, d10, d12, d20};
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})();
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