- 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 - sub() Method
This method returns a string with the first count occurrences of pattern replaced by either a regular string, the returned value of a function or a Template string. Pattern can be a string or a regular expression.
Syntax
string.sub(pattern, replacement[, count = 1]);
Return Value
Returns a string.
Example
<html> <head> <title>Prototype examples</title> <script type = "text/javascript" src = "/javascript/prototype.js"></script> <script> function showResult() { var fruits = 'apple pear orange'; alert("fruits.sub(' ', ', '):"+ fruits.sub(' ', ', ')); alert("fruits.sub(' ', ', ', 1): " + fruits.sub(' ', ', ', 1)); alert("fruits.sub(' ', ', ', 2): " + fruits.sub(' ', ', ', 2)); var str = fruits.sub(/\w+/, function(match) { return match[0].capitalize() + ','}, 2); alert(str); } </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_string_processing.htm
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