diff --git a/snippets/shuffle.md b/snippets/shuffle.md index 99a0e25d6..54687f67f 100644 --- a/snippets/shuffle.md +++ b/snippets/shuffle.md @@ -5,16 +5,13 @@ Randomizes the order of the values of an array, in place. Uses the Fisher-Yates algoritm to reorder the elements of the array, based on the [Lodash implimentation](https://github.com/lodash/lodash/blob/b2ea6b1cd251796dcb5f9700c4911a7b6223920b/shuffle.js) ```js -const shuffle = (arr = []) => { - let i = -1; - const lastIndex = arr.length - 1; - while (++i < arr.length) { - const rand = i + Math.floor(Math.random() * (lastIndex - i + 1)); - const value = arr[rand]; - arr[rand] = arr[i]; - arr[i] = value; +const shuffle = ([...arr]) => { + let m = arr.length; + while (m) { + const i = Math.floor(Math.random() * m--); + [arr[m], arr[i]] = [arr[i], arr[m]]; } - return arr + return arr; }; // shuffle([1,2,3]) -> [2,3,1] ```