Javascript Array object concat () method, arrayconcat

Javascript Array object concat () method, arrayconcat

The concat () method is used to connect two or more arrays.

This method does not change the existing array, but only returns a copy of the connected array.

Syntax:
ArrayObject. concat (arrayX, arrayX,..., arrayX)

 
ArrayX is required. This parameter can be a specific value or an array object. It can be any number.

Return Value:
Returns a new array. This array is generated by adding all arrayX parameters to arrayObject. If the concat () operation parameter is an array, the elements in the array are added instead of an array.

Example 1:
Connect the parameters in concat () to array:

<script type="text/javascript">var a = [1,2,3];document.write(a.concat(4,5));</script>

Output:

1, 2, 3, 4, 5

 

Example 2:
Two arrays are created and connected using concat:

<pre class="javascript" name="code"><script type="text/javascript">var arr = new Array(3)arr[0] = "George"arr[1] = "John"arr[2] = "Thomas"var arr2 = new Array(3)arr2[0] = "James"arr2[1] = "Adrew"arr2[2] = "Martin"document.write(arr.concat(arr2))</script>

 

Output:

George, John, Thomas, James, Adrew, Martin