- 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
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Prototype - Enumerable size() Method
This method returns the size of the enumeration.
Syntax
Iterator.size();
Return Value
Returns the size of the enumeration.
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 : " + $R(1, 10).size() );
// Returns 10
alert("Test 2 : " + ['hello', 42, true].size() );
// Returns 3
alert("Test 3 : " + $H().size() );
// Returns 0
}
</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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