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Prototype scan() Method


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This method allows iterating over every occurrence of the given pattern (which can be a string or a regular expression).

Syntax:

string.scan(pattern, iterator);

Return Value:

  • Returns the original string.

Example:

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

function showResult(){

  var str = "apple, pear & orange";
  alert ("Actaul Alert");
  alert ( str.scan(/\w+/, alert ) );
}

</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.

Following example can be used to populate an array:

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

function showResult(){

  var fruits = [];
  var str = "apple, pear & orange";
  str.scan(/\w+/, function(match){ fruits.push(match[0])});
  fruits.inspect();
  alert ( "fruits[0] : " + fruits[0]);
  alert ( "fruits[1] : " + fruits[1]);
  alert ( "fruits[2] : " + fruits[2]);
}

</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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