The difference between split and join in JavaScript

The difference between split and join in JavaScript

1. split() is used to split strings , returns an array

For example:

var string=“hello world?name=xiaobai”; var splitString = string.split("?"); console.log(splitString);//["hello world","name=xiaobai"]

split() has only one parameter: split string or regular expression; when there are two parameters, the second parameter refers to The number of elements in the returned array;

2. join() is used to connect multiple characters or strings, and the return value is a string

For example:

var arr= new Array(); arr[0]="hello"; arr[1]="xiao"; arr[2]= "bai"; arr.join("&");//"hello&xiao&bai" join();//默认分割符为逗号；

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