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Prototype Enumerable reject() Method


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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 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>

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



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