How to generate a randomly scrambled array in JS-JS Tutorial-php.cn

How to generate a randomly scrambled array in JS

亚连

Release： 2018-06-15 17:57:41

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This article mainly introduces the method of JS to generate randomly scrambled arrays, involving related operation skills of random sorting of javascript arrays. Friends who need it can refer to it

The example of this article tells the story of JS generating randomly scrambled arrays Methods. Share it with everyone for your reference, the details are as follows:

1. A messy sorting method

function fnLuanXu(num) {
    var aLuanXu=[];
    for (var i = 0; i < num; i++) {
      aLuanXu[i] = i;
    }
    for (var i = 0; i < num; i++) {
      var iRand = parseInt(num * Math.random());
      var temp = aLuanXu[i];
      aLuanXu[i] = aLuanXu[iRand];
      aLuanXu[iRand] = temp;
      //console.log(&#39;i=&#39;+i+&#39;;temp=&#39;+temp+&#39;;rand=&#39;+iRand+&#39;;array[&#39;+i+&#39;]=&#39;+aLuanXu[i]+&#39;;array[&#39;+iRand+&#39;]=&#39;+aLuanXu[iRand]+&#39;;array=[&#39;+aLuanXu+&#39;];&#39;);
    }
    return aLuanXu;
}
//测试：
console.log(fnLuanXu(6));

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Running results:

2. A less messy sorting method, js built-in function.

function fnLuanXu(num) {
    var aLuanXu=[];
    for (var i = 0; i < num; i++) {
      aLuanXu[i] = i;
    }
    aLuanXu.sort(function(){return Math.random()>0.5?-1:1;})
    return aLuanXu;
}
//测试：
console.log(fnLuanXu(7));

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Run results:

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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