Array unshift()

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

 
<!DOCTYPE html>
<html>
<head>
    <title>Example</title>
    <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