TypeScript - Array unshift()

unshift() method adds one or more elements to the beginning of an array and returns the new length of the array.


array.unshift( element1, ..., elementN );

Parameter Details

element1, ..., elementN − The elements to add to the front of the array.

Return Value

Returns the length of the new array. It returns undefined in IE browser.


var arr = new Array("orange", "mango", "banana", "sugar"); 
var length = arr.unshift("water"); 
console.log("Returned array is : " + arr );
console.log("Length of the array is : " + length );

On compiling, it will generate the same code in JavaScript.

Its output is as follows −

Returned array is : water,orange,mango,banana,sugar 
Length of the array is : 5
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