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The exec method searches string for text that matches regexp. If it finds a match, it returns an array of results; otherwise, it returns null.
RegExpObject.exec( string ); |
Here is the detail of parameters:
string : The string to be searched
Returns the matched text if a match is found, and null if not.
<html> <head> <title>JavaScript RegExp exec Method</title> </head> <body> <script type="text/javascript"> var str = "Javascript is an interesting scripting language"; var re = new RegExp( "script", "g" ); var result = re.exec(str); document.write("Test 1 - returned value : " + result); re = new RegExp( "pushing", "g" ); var result = re.exec(str); document.write("<br />Test 2 - returned value : " + result); </script> </body> </html> |
This will produce following result:
Test 1 - returned value : script Test 2 - returned value : null |
To understand it in better way you can Try it yourself.
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