Prototype - Enumerable invoke() Method

Quiz

This method is an optimization for a common use-case of each() or collect() method. Invoking the same method, with the same potential arguments, for all the elements.

Syntax

Iterator.invoke(methodName[, arg...]);

Return Value

Returns the results of the method calls.

Example

<html>
   <head>
      <title>Prototype examples</title>
      <script type = "text/javascript" src = "/javascript/prototype.js"></script>
      
      <script>
         function showResult() {
            alert(['hello', 'world', 'cool!'].invoke('toUpperCase') );
            // Returns ['HELLO', 'WORLD', 'COOL!'];

            alert(['hello', 'world', 'cool!'].invoke('substring', 0, 3));
            // Returns ['hel', 'wor', 'coo']
         }
      </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

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