I’m not great with regex since I don’t use it a ton so I constantly find myself looking up simple, reusable regex statements…thought I’d just start listing them as I use them in case someone else finds them useful. This will start with just a couple examples that we’ll continue to add to.

Assume the following vars:

var myString:String;
var pattern:RegExp;
var resultString:String;
var isSuccess:Boolean;

Remove All Spaces

myString = "The quick brown fox.";
pattern = /\s+/g;
resultString = myString.replace(pattern, "");
trace(resultString); // Thequickbrownfox.

Remove Special Characters & Spaces

myString = "The 123 quick 456 brown !@#$% fox.";
pattern = /\W/g;
resultString = myString.replace(pattern, "");
trace(resultString); // The123quick456brownfox

Remove Special Characters & Numbers & Spaces

myString = "The 123 quick 456 brown !@#$% fox.";
pattern = /[^a-zA-Z]+/g;
resultString = myString.replace(pattern, "");
trace(resultString); // Thequickbrownfox

Test URL String

myString = "http://yahoo.com";
pattern = /^http(s)?:\/\/((\d+\.\d+\.\d+\.\d+)|(([\w-]+\.)+([a-z,A-Z][\w-]*)))(:[1-9][0-9]*)?(\/([\w-.\/:%+@&=]+[\w- .\/?:%+@&=]*)?)?(#(.*))?$/i;
isSuccess = pattern.test(myString);
trace(isSuccess); // true
myString = "htt://yahoo.com";
isSuccess = pattern.test(myString);
trace(isSuccess); // false

Trim String (With Tabs & Returns): Courtesy of Jeff Channel

myString = myString = "The quick brown fox.                   		";
pattern = /^\s+|\s+$/gs;
resultString = myString.replace(pattern, "");
trace(resultString); // "The quick brown fox."

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