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If you do much programming you’re probably at least heard of Regular Expressions. If you’re anything like me any time you need to come up with a regular expression you open up a book and look up the list of characters.

Next time take a look at RegExr. It let’s you enter a regex expression and test it against a block of text. Hovering over the regex commands will popup an explanation of what each means (\b = word boundry, \w = any word character, etc).

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