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Java Script Array Methods with Examples Part 1

Hey Guys, in this blog we are going to learn about JavaScript Array like what is Array, How to create Array, Methods of array with example, etc....

Let's get started... 

In this part we are covering below list of topics from array.

  •  PUSH(),
  • POP(),
  • SHIFT(),
  • UNSHIFT(),
  • SLICE(),
  • ISARRAY(),
  • SKIP VALUE 



What is the Array


 - In simple word we can say array is collection of  items.
 - In JavaScript A Pair of square brackets is represent as a Array. like []
 - we can specify different element in array by comma separate. like [a b, c, d, ..., z]

Array looks like below:
   

const arrayDeclare = [100, 'd',  45,  67]


How to create Array


-In Java Script we can create array using different way like spread operators, Array.of(), Array.from(), etc..
-Here we are going to look into straight-forward way of creating array.

 



 


we can also use Array constructor to create array like below


 
Now let's start Experiments in Array   :)


How to access element from array?


 - suppose if you wish to access element from array then it's very simple. Let's take above example array
  
   const listOfItems = [ 'test', 'demo', 'parts', 'nothing', 'everything' ];

 - I want to access `test`  then simply i need to use this way:  listOfItems[0]

 - Similar others like below
   

 - In Array indexing start with 0. it's very important point.

 

How to add new element in Array ?? :(

- In Array we have some in-build methods so for adding new element in array we have push() method in array 

- push(): this method is mainly used for adding new element in existing array.

For Example



O/P: 


How to add new element in the beginning of the Array??

- in Array we have unshift() method. this method is used for adding element in the beginning of the array. 

For Example


O/P:


How to remove element from array ?

 

- In Array we have POP() method for remove element from array. It's remove element from the end of the array.

 

For Example


O/P:


How to remove element in the beginning of the Array??

- In Array we have shift() method for remove element from array. It's remove element from the beginning of the array.

 

For Example



O/P:

 


How to check value is Array or not??

- in Array we have isArray() method that we are using for checking value is  array or not.

 

For Example:

 


How can i skip value in Array ??

- While doing destructuring of the array we can skip value. like below

For Example


How to copy and close the Array ??


- In Array we have slice() method that we are using for copy of existing array. 

- Slice() method is not going to change in existing array it's create new array like below

For Example


If you guys have any query then you can drop a mail to us on this mail id:

 

techoswag@gmail.com


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