Sharing methods for generating randomly shuffled arrays using JS

The example in this article describes how JS generates a randomly scrambled array. I share it with you for your reference, hoping to help you better learn how to generate randomly scrambled arrays with JS.

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));

operation result:

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));

Running results:

#Have you learned it? Hurry up and try it out.

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