Example analysis of random sorting of javascript array_javascript skills

The example in this article describes how to implement random sorting of javascript arrays. Share it with everyone for your reference. The details are as follows:

We will test the random ordering of 0-9 and generate data first

var arr=[9,3,1,2,5,8,4,7,6,0];
arr.sort();
document.write("正常排序后的数组元素："+arr.join(",")+"<BR />");

Array elements after normal sorting: 0,1,2,3,4,5,6,7,8,9
Define a random function to randomly return positive or negative numbers. The sort function will determine whether the two values ​​are in positive or negative order based on the positive and negative numbers returned randomly

function randomSort(a, b){
  return Math.random() - 0.5;
}
arr.sort(randomSort);
document.write("随机排序后的数组元素："+arr.join(",")+"<BR />");

Randomly sorted array elements: 3,1,7,4,8,6,2,0,9,5

Randomly sorted array elements: 8,3,1,9,5,0,7,6,4,2

I hope this article will be helpful to everyone’s JavaScript programming design.