Prototype Ranges represent an interval of values. The preferred way to obtain a range is to use the $R utility function.
You can create a big range of values using a simple syntax as follows −
You can create a big range of values using a simple syntax as follows −
$R(1, 10).inspect();
$R('a', 'e').inspect();
This will produce the following result −['1, 2, 3, 4, 5, 6, 7, 8, 9, 10'] ['a', 'b', 'c', 'd', 'e']
The include() Method
This method determines whether the value is included in the range −Syntax
Range.include(value);
Return Value
If value is included, then returns a true value otherwise false.Example
<html> <head> <title>Prototype examples</title> <script type = "text/javascript" src = "/javascript/prototype.js"></script> <script> function showResult() { alert ( "Test 1 : " + $R(1, 10).include(5)); // Returns true alert ( "Test 2 : " + $R('a', 'h').include('x')); // Returns flase } </script> </head> <body> <p>Click the button to see the result.</p> <br /> <br /> <input type = "button" value = "Result" onclick = "showResult();"/> </body> </html>
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