Tutorials Point


  Learn Prototype
  Prototype Resources
  Selected Reading

Copyright © 2014 by tutorialspoint



  Home     References     Discussion Forums     About TP  

Prototype indexOf() Method


previous next AddThis Social Bookmark Button


Advertisements

This method returns the position of the first occurrence of the argument within the array. If the argument doesn't exist in the array, returns -1.

NOTE: First index of the Array starts from zero.

Syntax:

array.indexOf(value)  ;

Return Value :

  • Returns the position of the first occurrence of the argument within the array. If the argument doesn't exist in the array, returns -1

Example:

<html>
<head>
<title>Prototype examples</title>
<script type="text/javascript" 
   src="/javascript/prototype.js">
</script>
<script>

function showResult(){

   var arr = [3, 5, 6, 1, 20];
   alert("Found position : "  + arr.indexOf(6) );
}

</script>
</head>

<body>

  <p>Click the button to see the result.</p>
  <br />
  <br />
  <input type="button" value="Result" onclick="showResult();"/>

</body>
</html>

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



previous next Printer Friendly

Advertisements


  

Advertisements