// 数组乱序
outOfOrder(arr) {
var j, tem, i;
for (i = arr.length; i; i--) {
j = Math.floor(Math.random() * i);
tem = arr[i - 1];
arr[i - 1] = arr[j];
arr[j] = x;
}
return arr;
},
js 数组乱序
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