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How Do I...? Common Tasks QuickStart Tutorial

How Do I...Use common Regular Expressions?

There are a variety of tasks that regular expressions can be used for in regards to input validation and file parsing. Some of the most common expressions are often hard to remember because of the power and options available. Here is a list of commonly used regular expressions:

Use	Expression
Social Security Number	\d{3}-\d{2}-\d{4}
US Phone Number	(($\d{3}$ ?)\|(\d{3}-))?\d{3}-\d{4}
US Postal Code	\d{5}(-\d{4})?
Internet EMail Address	[\w-]+@([\w-]+\.)+[\w-]+
Internet URL	http://([\w-]\.)+[\w-](/[\w- ./?%=]*)?
Simple Password (digit)	^(?=.*\d).{4,8}$
Advanced Password (upper, lower, digit)	^(?=.\d)(?=.[a-z])(?=.*[A-Z]).{4,8}$
Common File masks	^(.+)\\(.+)\.(.+)
Major Credit Card	\d{4}-?\d{4}-?\d{4}-?\d{4}

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