Web | This Site

Learn Prototype
Prototype Resources
Selected Reading
© 2011 TutorialsPoint.COM

| Home |  | References |  | Discussion Forums |  | About TP

# Prototype Expressing Range

Prototype Ranges represent an interval of values. The preferred way to obtain a range is to use the $R utility function.

You can create a big range of values using a simple syntax as follows:

    $R(1, 10).inspect();

    $R('a', 'e').inspect();

This will produce following result:

    ['1, 2, 3, 4, 5, 6, 7, 8, 9, 10']

    ['a', 'b', 'c', 'd', 'e']

## The include() Method

This method determines whether the value is included in the range:

## Syntax:

    Range.include(value);

## Return Value :

- If value is included then returns a true value otherwise false.

## Example:

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

    function showResult()
    {
       alert ( "Test 1 : " + $R(1, 10).include(5));
       // Returns true

       alert ( "Test 2 : " + $R('a', 'h').include('x'));
       // Returns flase

    }

    </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.

Advertisement

Online Image Processing

Indian Baby Names