JS

WAYS TO ADD ELEMENTS TO ARRAY

(quick guide & examples)

PUSH - ADD TO END OF ARRAY var arr = ["First", "Second"]; arr.push("Third");

ARRAY PUSH

01

First, Second, Third console.table(thearray);

UNSHIFT - ADD TO START OF ARRAY var arr = ["First", "Second"]; arr.unshift("Third"); 

UNSHIFT ARRAY

02

Third, First, Second console.table(arr);

ASSIGN TO END OF ARRAY var arr = ["First", "Second"]; arr[arr.length] = "Third"; 

ARRAY ASSIGN

03

First, Second, Third console.table(arr);

ARRAY CONCAT

04

CONCAT - JOIN 2 ARRAYS var arrA = ["First", "Second"]; var arrB = ["Third", "Forth"]; var combined = arrA.concat(arrB);

First, Second, Third, Forth console.table(combined);

SPLICE INSERT var arr = ["First", "Second", "Third"]; arr.splice(1, 0, "INSERTED");  

ARRAY SPLICE

05

First, INSERTED, Second, Third console.table(arr);