Array unshift()

In this chapter you will learn:

How to use Javascript array unshift() method

Array unshift()

unshift() adds items to the front of an array and returns the new array length.

<!DOCTYPE html><!--from  ja v  a 2  s.c o m-->
<html>
<head>
    <script type="text/javascript">
        var colors = new Array(); //create an array 
        
        var count = colors.unshift("A", "B"); //push two items 
        document.writeln(count); //2 
        count = colors.unshift("C"); //push another item on 
        
        document.writeln(count); //3 
        var item = colors.pop(); //get the first item 
        document.writeln(item); //"B" 
        document.writeln(colors.length); //2 
        
       
    </script>
</head>
<body>
</body>
</html>

Click to view the demo

Next chapter...

What you will learn in the next chapter:

What is JSON
What is JSON Syntax
How to use JSON to represent simple values
How to use JSON to represent objects
How to use JSON to represent arrays

Array unshift()

Array unshift()

Next chapter...

Array Type

Array creation

Array type detecting

Array iterate

Array Length

Add to Array

Array join

Array concat()

Array every method

Array search from start with indexOf()

Array search from the end with lastIndexOf()

Array filter

Array mapping

Array forEach

Array pop and push

Array shift()

Array reduce()

Array reduceRight()

Array reverse()

Array slice()

Array some()

Array splice()

Array sort()

Array toString()

Array unshift()