第 118 期(算法-排序)：数组乱序 #121
Description
随机打乱一个数组中项目的顺序：
function shuffle(arr) {
arr = [...arr];
for (let i = 0, len = arr.length; i < len; i++) {
var rdmIndex = i + Math.floor(Math.random() * (len - i));
[arr[i], arr[rdmIndex]] = [arr[rdmIndex], arr[i]];
}
return arr;
}
shuffle([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);或者封装到数组原型链上：
Array.prototype.shuffle = function() {
arr = [...this];
for (let i = 0, len = arr.length; i < len; i++) {
var rdmIndex = i + Math.floor(Math.random() * (len - i));
[arr[i], arr[rdmIndex]] = [arr[rdmIndex], arr[i]];
}
return arr;
}
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10].shuffle();