- Prototype Tutorial
- Prototype - Home
- Prototype - Short Overview
- Prototype - Useful Features
- Prototype - Utility Methods
- Prototype - Element Object
- Prototype - Number Processing
- Prototype - Strings Processing
- Prototype - Array Processing
- Prototype - Hash processing
- Prototype - Basic Object
- Prototype - Templating
- Prototype - Enumerating
- Prototype - Event Handling
- Prototype - Form Management
- Prototype - JSON Support
- Prototype - AJAX Support
- Prototype - Expressing Ranges
- Prototype - Periodical Execution
- Prototype Useful Resources
- Prototype - Quick Guide
- Prototype - Useful Resources
- Prototype - Discussion
Prototype - Enumerable select() Method
This method returns all the elements for which the iterator returned true. This is an alias of findAll().
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.select([context]);
Return Value
Returns all the elements for which the iterator returned true.
Example
<html>
<head>
<title>Prototype examples</title>
<script type = "text/javascript" src = "/javascript/prototype.js"></script>
<script>
function showResult() {
var arr = $R(1, 10).select(function(n) { return 0 == n % 2; });
alert("Test 1 : " + arr.inspect() );
// Returns [2, 4, 6, 8, 10]
var arr = [ 'world', 'this', 'is', 'nice'].select(function(s) {
return s.length >= 5;
})
alert("Test 2 : " + arr.inspect() );
// Returns ['world']
}
</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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