js数组随机排序

强调一下下

functionshuffle(arr){

return arr.sort(function(){returnMath.random() -0.5;});

}

这种是不完全随机的，参考http://blog.csdn.net/jiang_zzz/article/details/53786999

function shuffleArray(array) {

for (var i = array.length - 1; i > 0; i--) {

var j = Math.floor(Math.random() * (i + 1));

var temp = array[i];

array[i] = array[j];

array[j] = temp;

}

return array;

}

es6写法

Array.prototype.shuffle = function() {

let m = this.length, i;

while (m) {

i = (Math.random() * m--) >>> 0;

[this[m], this[i]] = [this[i], this[m]]

}

return this;

}