JavaScript Array

JavaScript array is an object that represent a collection of similar type of elements.

There are 3 ways to construct array in JavaScript.

• JavaScript Array Literal

  var arrayname=[value1, value2....valueN];
  

• JavaScript Array Directly

  var arrayname=new Array();
  

Here, new keyword is used to create instance of array.

• JavaScript array constructor

  Here, you need to create instance of array by passing arguments in constructor so that we don't have to provide value explicitly.

EXAMPLE

 <script>
   var emp = new Array("Shakti", "Amit", "Subo",);
      for ( i=0 i< emp .length; i++){
        document write (emp [ i ] +"<br>")
         }
       </script>

Output

Shakti

Amit

Subo

JavaScript Array Methods

Concat()

It returns a new array object that contains two or more merged arrays.

CopyWithin()

It copies the part of the given array with its own element and returns the modified array.

entries()

It creates an iterator object and a loop that iterates over each key/value pair.

every()

It determines Whether all the elements of an array are satisfying the provided function conditions.

flat()

It creates a new array carrying sub-array elements concatenates recursively till the specified depth.

flatMap()

It maps all array elements via mapping functions than flattens the result into a new array.

fill()

It fills elements into an array with static values.

forEach()

It invokes the provided function once for each element of an array.

includes()

It checks weather the given array contains the specified element.

isArray()

It tests if the passed value is an array.

join()

It joins the elements of an array as a string.

push()

It adds one or more elements to the end of an array.