cutting in js

str="2,2,3,5,6,6"; //This is a string
var strs= new Array(); //Define an array
strs=str.split(","); //Character Split
for (i=0;i<strs.length ;i++ )
{
document.write(strs[i]+"<br/>"); //The split character output
}

The output is 2 2 3 5 6 6

 

js split is to split a string into multiple strings with specific characters

 

 

The split() method splits a string into an array of strings

 

If an empty string ("") is used as the separator , then each character in the stringObject will be split.

 

slice() 
returns the selected element from the existing array  
Object.slice(start,end)
var arr=[1,2,3,4,5] 
console.log(arr.slice(0,3))
/ /1,2,3 

 

Substring()
function: String interception, for example, if you want to get "Minidx" from "MinidxSearchEngine", you need to use it

 

substring(0,6))
var str = "0123456789";

alert(str.substring(0));------------"0123456789"
alert(str.substring(5));------------"56789"
alert(str.substring(10));-----------""

The output is respectively;------------"0123456789"
------------"56789"
------------""

The charAt() method returns the character at the specified position

Truncate the first character

var str="Hello world!"
console.log(str.charAt(1))

The output is e

 

 

concat（）

concatenates two arrays together;

arr1 = [1,2,3,4]

　　arr2=[5,6,7,8]

　　console.log(arr1.concat(arr2))  

//The result is [1,2,3,4,5,6,7,8]