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Javascript Array splice() Method


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Description:

Javascript array splice() method changes the content of an array, adding new elements while removing old elements.

Syntax:

array.splice(index, howMany, [element1][, ..., elementN]);

Here is the detail of parameters:

  • index : Index at which to start changing the array.

  • howMany : An integer indicating the number of old array elements to remove. If howMany is 0, no elements are removed.

  • element1, ..., elementN : The elements to add to the array. If you don't specify any elements, splice simply removes elements from the array.

Return Value:

Returns the extracted array based on the passed parameters.

Example:

<html>
<head>
<title>JavaScript Array splice Method</title>
</head>
<body>
<script type="text/javascript">
var arr = ["orange", "mango", "banana", "sugar", "tea"];

var removed = arr.splice(2, 0, "water");
document.write("After adding 1: " + arr );
document.write("<br />removed is: " + removed);

removed = arr.splice(3, 1);
document.write("<br />After adding 1: " + arr );
document.write("<br />removed is: " + removed);

</script>
</body>
</html>

This will produce following result:

After adding 1: orange,mango,water,banana,sugar,tea
removed is: 
After adding 1: orange,mango,water,sugar,tea
removed is: banana 

To understand it in better way you can Try it yourself.



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