Description

The shift() method removes the first element of an array, and returns that element.

This method has the form:

Array.shift()

Examples

The following example shows the basic use of this method.

<script>
var cols = [ "Red", "Green", "Blue" ];
document.write(cols.shift());
</script>

This produces the following result:

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The unshift() method adds new elements to the beginning of an array, and returns the new length.

This method has the form:

Array.unshift(e1,e2,...,eX)

Parameter	Description
e1,e2,...,eX	(required) The element(s) to add to the beginning of the array

Note: This method changes the original array.

The following example shows the basic use of this method.

<script>
var cols = [ "Red", "Green", "Blue" ];
document.write(cols.unshift("Yellow"));
document.write("<br />");
document.write(cols);
</script>

This produces the following result:

Firefox	IE	Chrome	Opera	Safari