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；

This article comes from the js tutorial column, welcome to learn!

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