C# Text Manipulation Handbook

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Regular Expressions

Chapter 5

Page 156 ?US Tel No

\d-\d\d\d-\d\d\d-\d\d\d\d

Page 156?nbsp;US Date

[a-zA-Z][a-zA-Z][a-zA-Z] \d\d \d\d\d\d

Page 157?nbsp;US Date + Dashes

[a-z][a-z][a-z][ -]\d\d[ -]\d\d\d\d

Page 158?nbsp;Credit Card Number

^\d\d\d\d \d\d\d\d \d\d\d\d \d\d\d\d$

Page 159?nbsp;US Tel No Revisited

^\d-\d{3}-\d{3}-\d{4}$

Page 159?nbsp;US Date Revisited

^[a-zA-Z]{3}[ -]\d\d[ -]\d{4}$

Page 160?nbsp;Credit Card Number Revisited

^\d{4} ?\d{4} ?\d{4} ?\d{4}$

Page 161?nbsp;ISBN, Greedy

^(\d[- ]*){9}[\dxX]$

Page 164?nbsp;Lines of text, Greedy

^[\w\W]+$C

Page 165?nbsp;Lines of text, non-greedy

^[\w\W]+?$

Page 166?nbsp;ISBN, non-greedy

^(\d[-\s]*?){9}[\dxX]$

Chapter 6

Page 172?nbsp;HTML element name

<([a-zA-Z]\d?)>[^<]*</\1>

Page 173?nbsp;Capturing Group

([A-Z]{3})\d

Page 173?nbsp;Non-Capturing Group

(?:\d|[A-Z])\w

Page 174?nbsp;Capturing by Name

\b[A-Z][a-z]+ (?<lastName>[A-Z][a-z]+)\b

Page 174?nbsp;Title and Name (Capturing group)

(Mr|Mrs|Miss|Ms|Dr) [A-Z][a-z]*

Page 175?nbsp;Title and Name (Without a group)

Mr|Mrs|Miss|Ms|Dr [A-Z][a-z]*

Page 176?nbsp;Title and Name (Non-capturing group)

(?:Mr|Mrs|Miss|Ms|Dr) [A-Z][a-z]*

Page 176?nbsp;Title, Name, Optional Period

(?:Mr|Mrs|Miss|Ms|Dr)\.? [A-Z][a-z]*

Page 177?nbsp;Collecting Patterns

(\d\d)\s([A-Z][A-Z])

Page 178?nbsp;Named Pattern to Collect

(?<numberGroup>\d\d)\s(?<letterGroup>[A-Z][A-Z])

Page 178?nbsp;Non-Capturing Pattern

(?:\d\d)\s([A-Z][A-Z])

Page 180?nbsp;Capturing Surname, not Title

(?:Mr|Mrs|Miss|Ms|Dr) ([A-Z][a-z]*)

Page 181?nbsp;Explicit Capture

(Mr|Mrs|Miss|Ms|Dr) (?<lastName>[A-Z][a-z]*)

Page 184?nbsp;Named Substitution

(?<firstWord>\b[a-zA-Z]+\b)\s\k<firstWord>

Page 185?nbsp;Positive Look-ahead Assertion

\S+(?=\.NET)

Page 185?nbsp;Negative Look-ahead Assertion

\d{3}(?![A-Z])

Page 185?nbsp;Positive Look-behind Assertion

(?<=New )([A-Z][a-z]+)

Page 186?nbsp;Negative Look-behind Assertion

(?<!1)\d{2}[A-Z]

Page 186?nbsp;Non-backtracking Match

(?>.*)ing

Page 190?nbsp;Non-backtracking on Domain Names

www\.(?>[^.]*)\.com

Page 190?nbsp;Decision Making on Expressions

(?(\d)\dA|[A-Z]B)

Page 191?nbsp;Decision Making on Names

(?(\d)A|B)

Page 192?nbsp;Correct Named Decision Making

(?(\d)\dA|B)

Page 193?nbsp;Case Insensitive Group

(?i:[a-z])

Page 193?nbsp;Case Sensitive Group

(?-i:[a-z])

Page 193?nbsp;Multiple Options in a Group

(?n-i:[a-z])

Chapter 7

Page 202?nbsp;Floating Point Numbers

^(?:\+|-)?\d+(?:\.\d+)?$

Page 203?nbsp;Telephone Numbers

^(\+\d{1,3} ?)?(\(\d{1,5}\)|\d{1,5}) ?\d{3} ?\d{0,7}( (x|xtn|ext|extn|extension)?" \.? ?\d{1,5})?$

Page 206?nbsp;Postal Codes

^(\d{5}(-\d{4})?|"([a-z][a-z]\d\d?|[a-z]{2}\d[a-z]) ?\d[a-z][a-z])$

Page 208?nbsp;IP Addresses

^((1??\d{1,2}|2[0-4]\d|25[0-5])\.){3}(1??\d{1,2}|2[0-4]\d|25[0-5])$

Page 209?nbsp;Domain Name

^(([a-z]|#\d+?)([a-z0-9-]|#\d+?)*([a-z0-9]|#\d+?)\.)+([a-z]{2,4})$

Page 210?nbsp;Email Name

^(([^<>()\[\]\\.,;:@"\x00-\x20\x7F]|\\.)+|("""([^\x0A\x0D"\\]|\\\\)+"""))$

Page 210?nbsp;Email Address

^(?<person>([^<>()\[\]\\.,;:@"\x00-\x20\x7F]|\\.)+|("""([^\x0A\x0D"\\]|\\\\)+"""))@(?<domain>(([a-z]|#\d+?)([a-z0-9-]|#\d+?)*([a-z0-9]|#\d+?)\.)+([a-z]{2,4})|((1??\d{1,2}|2[0-4]\d|25[0-5])\.){3}(1??\d{1,2}|2[0-4]\d|25[0-5]))$

Page 222?nbsp;Matching HTML Tags

(<[a-z]+[^>]*>)|(</[a-z\d]+>)

Page 224?nbsp;Extracting HTML Tags

<(?<outertag>[a-z]+[\d]?)(?<attributes> [^>]*)*>(?<innerhtml>(<(?<innertag>[a-z]+[\d]?)[^>]*>.*?</\k<innertag>>|<[a-z]+[\d]?[^>]*>|(?>[^<]*))*(?=</\k<outertag>>))?