写php的时候 有个shuffle  函数很爽很好用，但是js要实现同样算法的时候发现没有现成函数，在网上看了大量的例子，觉得不靠谱所以，自己写了一个，其实非常简单，以下是实现代码

var shuffle = function (arrBox) {

arrBox = typeof arrBox === "string" ? arrBox.split("") : arrBox;

//实现一个洗牌算法

var shuffleBox = []

var len = arrBox.length;

for (i = 0; i < len; i++) {

var boxIndex = Math.floor(Math.random() * arrBox.length);

shuffleBox.push(arrBox[boxIndex].valueOf());

arrBox.splice(boxIndex, 1);

}

return shuffleBox;

}

var data = new Arra

示例

shuffle("abcdefghijklmnuvwxyz".split(""));

//结果显示

["g", "u", "x", "k", "y", "f", "v", "l", "j", "n", "b", "z", "w", "d", "c", "e", "a", "h", "i", "m"]

shuffle("abcdefghijklmnuvwxyz".split(""));

//结果显示

["a", "j", "m", "f", "g", "h", "c", "l", "v", "x", "w", "u", "k", "d", "e", "b", "n", "y", "z", "i"]

说明：有的朋友可能觉得我的参数并不是数组，其实是这样的 在console中执行：

"abcdefghijklmnuvwxyz".split("")

//输出

["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "u", "v", "w", "x", "y", "z"]

还有一个随机字符串的算法

randStr = (randLen, split, toUpper, str) => {

let shuffle = function (arrBox) {

arrBox = typeof arrBox === "string" ? arrBox.split("") : arrBox;

let shuffleBox = []

let len = arrBox.length;

for (let i = 0; i < len; i++) {

let boxIndex = Math.floor(Math.random() * arrBox.length);

shuffleBox.push(arrBox[boxIndex].valueOf());

arrBox.splice(boxIndex, 1);

}

return shuffleBox;

}

str = str || "abcdefghigklmnopkrstuvwxyz";

randLen=randLen||3;

randLen = randLen > str.length - 1 ? str.length - 1 : randLen;

let randKey = [

(new Date().getTime()).toString(32),

shuffle(str).splice(Math.floor(Math.random() * (str.length - randLen - 1)), randLen).join("")

];

let res = randKey.join(split || "");

return toUpper ? res.toUpperCase() : res;//生成一个随机不重复key

}