Prototype - Enumerable reject() Method


This method returns all the elements for which the iterator returned false.

The optional context parameter is what the iterator function will be bound to. If used, the this keyword inside the iterator will point to the object given by the argument.

Syntax

Iterator.reject([context]);

Return Value

Returns the array of the returned values.

Example

<html>
   <head>
      <title>Prototype examples</title>
      <script type = "text/javascript" src = "/javascript/prototype.js"></script>
      
      <script>
         function showResult() {
            var arr = $R(1, 10).reject(function(n) { return 0 == n % 2; });

            alert("Test 1 : " + arr.inspect() );
            // Returns [1, 3, 5, 7, 9]

            var arr = [ 'world', 'this', 'is', 'nice'].reject(function(s) {
               return s.length >= 5;
            })
            
            alert("Test 2 : " + arr.inspect() );
            // Returns ['this', 'is', 'nice']
         }
      </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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