Prototype - Enumerable include() Method


Advertisements


This method determines whether a given object is in the Enumerable or not, based on the == comparison operator. This is an alias of the member() method.

If you need to check whether there is an element matching a given predicate, use any() method instead.

Syntax

Iterator.include(object);

Return Value

Returns true if finds the given object, otherwise false.

Example

<html>
   <head>
      <title>Prototype examples</title>
      <script type = "text/javascript" src = "/javascript/prototype.js"></script>
      
      <script>
         function showResult() {
            alert("$R(1,15).include(10) : " + $R(1,15).include(10) );
            // Returns true

            alert("['hello', 'world'] : " + $R(1,15).include('HELLO') );
            // Returns false
         }
      </script>
   </head>

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

Output


prototype_enumerating.htm

Advertisements