Table of Contents for
Regular Expressions Cookbook, 2nd Edition

Version ebook / Retour

Cover image for bash Cookbook, 2nd Edition Regular Expressions Cookbook, 2nd Edition by Steven Levithan Published by O'Reilly Media, Inc., 2012
  1. Cover
  2. Regular Expressions Cookbook
  3. Preface
  4. Caught in the Snarls of Different Versions
  5. Intended Audience
  6. Technology Covered
  7. Organization of This Book
  8. Conventions Used in This Book
  9. Using Code Examples
  10. Safari® Books Online
  11. How to Contact Us
  12. Acknowledgments
  13. 1. Introduction to Regular Expressions
  14. Regular Expressions Defined
  15. Search and Replace with Regular Expressions
  16. Tools for Working with Regular Expressions
  17. 2. Basic Regular Expression Skills
  18. 2.1. Match Literal Text
  19. 2.2. Match Nonprintable Characters
  20. 2.3. Match One of Many Characters
  21. 2.4. Match Any Character
  22. 2.5. Match Something at the Start and/or the End of a Line
  23. 2.6. Match Whole Words
  24. 2.7. Unicode Code Points, Categories, Blocks, and Scripts
  25. 2.8. Match One of Several Alternatives
  26. 2.9. Group and Capture Parts of the Match
  27. 2.10. Match Previously Matched Text Again
  28. 2.11. Capture and Name Parts of the Match
  29. 2.12. Repeat Part of the Regex a Certain Number of Times
  30. 2.13. Choose Minimal or Maximal Repetition
  31. 2.14. Eliminate Needless Backtracking
  32. 2.15. Prevent Runaway Repetition
  33. 2.16. Test for a Match Without Adding It to the Overall Match
  34. 2.17. Match One of Two Alternatives Based on a Condition
  35. 2.18. Add Comments to a Regular Expression
  36. 2.19. Insert Literal Text into the Replacement Text
  37. 2.20. Insert the Regex Match into the Replacement Text
  38. 2.21. Insert Part of the Regex Match into the Replacement Text
  39. 2.22. Insert Match Context into the Replacement Text
  40. 3. Programming with Regular Expressions
  41. Programming Languages and Regex Flavors
  42. 3.1. Literal Regular Expressions in Source Code
  43. 3.2. Import the Regular Expression Library
  44. 3.3. Create Regular Expression Objects
  45. 3.4. Set Regular Expression Options
  46. 3.5. Test If a Match Can Be Found Within a Subject String
  47. 3.6. Test Whether a Regex Matches the Subject String Entirely
  48. 3.7. Retrieve the Matched Text
  49. 3.8. Determine the Position and Length of the Match
  50. 3.9. Retrieve Part of the Matched Text
  51. 3.10. Retrieve a List of All Matches
  52. 3.11. Iterate over All Matches
  53. 3.12. Validate Matches in Procedural Code
  54. 3.13. Find a Match Within Another Match
  55. 3.14. Replace All Matches
  56. 3.15. Replace Matches Reusing Parts of the Match
  57. 3.16. Replace Matches with Replacements Generated in Code
  58. 3.17. Replace All Matches Within the Matches of Another Regex
  59. 3.18. Replace All Matches Between the Matches of Another Regex
  60. 3.19. Split a String
  61. 3.20. Split a String, Keeping the Regex Matches
  62. 3.21. Search Line by Line
  63. Construct a Parser
  64. 4. Validation and Formatting
  65. 4.1. Validate Email Addresses
  66. 4.2. Validate and Format North American Phone Numbers
  67. 4.3. Validate International Phone Numbers
  68. 4.4. Validate Traditional Date Formats
  69. 4.5. Validate Traditional Date Formats, Excluding Invalid Dates
  70. 4.6. Validate Traditional Time Formats
  71. 4.7. Validate ISO 8601 Dates and Times
  72. 4.8. Limit Input to Alphanumeric Characters
  73. 4.9. Limit the Length of Text
  74. 4.10. Limit the Number of Lines in Text
  75. 4.11. Validate Affirmative Responses
  76. 4.12. Validate Social Security Numbers
  77. 4.13. Validate ISBNs
  78. 4.14. Validate ZIP Codes
  79. 4.15. Validate Canadian Postal Codes
  80. 4.16. Validate U.K. Postcodes
  81. 4.17. Find Addresses with Post Office Boxes
  82. 4.18. Reformat Names From “FirstName LastName” to “LastName, FirstName”
  83. 4.19. Validate Password Complexity
  84. 4.20. Validate Credit Card Numbers
  85. 4.21. European VAT Numbers
  86. 5. Words, Lines, and Special Characters
  87. 5.1. Find a Specific Word
  88. 5.2. Find Any of Multiple Words
  89. 5.3. Find Similar Words
  90. 5.4. Find All Except a Specific Word
  91. 5.5. Find Any Word Not Followed by a Specific Word
  92. 5.6. Find Any Word Not Preceded by a Specific Word
  93. 5.7. Find Words Near Each Other
  94. 5.8. Find Repeated Words
  95. 5.9. Remove Duplicate Lines
  96. 5.10. Match Complete Lines That Contain a Word
  97. 5.11. Match Complete Lines That Do Not Contain a Word
  98. 5.12. Trim Leading and Trailing Whitespace
  99. 5.13. Replace Repeated Whitespace with a Single Space
  100. 5.14. Escape Regular Expression Metacharacters
  101. 6. Numbers
  102. 6.1. Integer Numbers
  103. 6.2. Hexadecimal Numbers
  104. 6.3. Binary Numbers
  105. 6.4. Octal Numbers
  106. 6.5. Decimal Numbers
  107. 6.6. Strip Leading Zeros
  108. 6.7. Numbers Within a Certain Range
  109. 6.8. Hexadecimal Numbers Within a Certain Range
  110. 6.9. Integer Numbers with Separators
  111. 6.10. Floating-Point Numbers
  112. 6.11. Numbers with Thousand Separators
  113. 6.12. Add Thousand Separators to Numbers
  114. 6.13. Roman Numerals
  115. 7. Source Code and Log Files
  116. Keywords
  117. Identifiers
  118. Numeric Constants
  119. Operators
  120. Single-Line Comments
  121. Multiline Comments
  122. All Comments
  123. Strings
  124. Strings with Escapes
  125. Regex Literals
  126. Here Documents
  127. Common Log Format
  128. Combined Log Format
  129. Broken Links Reported in Web Logs
  130. 8. URLs, Paths, and Internet Addresses
  131. 8.1. Validating URLs
  132. 8.2. Finding URLs Within Full Text
  133. 8.3. Finding Quoted URLs in Full Text
  134. 8.4. Finding URLs with Parentheses in Full Text
  135. 8.5. Turn URLs into Links
  136. 8.6. Validating URNs
  137. 8.7. Validating Generic URLs
  138. 8.8. Extracting the Scheme from a URL
  139. 8.9. Extracting the User from a URL
  140. 8.10. Extracting the Host from a URL
  141. 8.11. Extracting the Port from a URL
  142. 8.12. Extracting the Path from a URL
  143. 8.13. Extracting the Query from a URL
  144. 8.14. Extracting the Fragment from a URL
  145. 8.15. Validating Domain Names
  146. 8.16. Matching IPv4 Addresses
  147. 8.17. Matching IPv6 Addresses
  148. 8.18. Validate Windows Paths
  149. 8.19. Split Windows Paths into Their Parts
  150. 8.20. Extract the Drive Letter from a Windows Path
  151. 8.21. Extract the Server and Share from a UNC Path
  152. 8.22. Extract the Folder from a Windows Path
  153. 8.23. Extract the Filename from a Windows Path
  154. 8.24. Extract the File Extension from a Windows Path
  155. 8.25. Strip Invalid Characters from Filenames
  156. 9. Markup and Data Formats
  157. Processing Markup and Data Formats with Regular Expressions
  158. 9.1. Find XML-Style Tags
  159. 9.2. Replace Tags with
  160. 9.3. Remove All XML-Style Tags Except and
  161. 9.4. Match XML Names
  162. 9.5. Convert Plain Text to HTML by Adding

    and
    Tags

  163. 9.6. Decode XML Entities
  164. 9.7. Find a Specific Attribute in XML-Style Tags
  165. 9.8. Add a cellspacing Attribute to Tags That Do Not Already Include It
  166. 9.9. Remove XML-Style Comments
  167. 9.10. Find Words Within XML-Style Comments
  168. 9.11. Change the Delimiter Used in CSV Files
  169. 9.12. Extract CSV Fields from a Specific Column
  170. 9.13. Match INI Section Headers
  171. 9.14. Match INI Section Blocks
  172. 9.15. Match INI Name-Value Pairs
  173. Index
  174. Index
  175. Index
  176. Index
  177. Index
  178. Index
  179. Index
  180. Index
  181. Index
  182. Index
  183. Index
  184. Index
  185. Index
  186. Index
  187. Index
  188. Index
  189. Index
  190. Index
  191. Index
  192. Index
  193. Index
  194. Index
  195. Index
  196. Index
  197. Index
  198. Index
  199. About the Authors
  200. Colophon
  201. Copyright

    202. V

    validating, Simple–Variations, Simple–Simple, Simple, with restrictions on characters–Simple, with restrictions on characters, Simple, with all valid local part characters–Simple, with all valid local part characters, No leading, trailing, or consecutive dots–No leading, trailing, or consecutive dots, Top-level domain has two to six letters–Top-level domain has two to six letters, About email addresses–Building a regex step-by-step, Problem–See Also, Problem–See Also, Problem–See Also, Problem–See Also, Problem–See Also, Dates–Dates, Weeks–Weeks, Times–Times, Date and time–Date and time, XML Schema dates and times–XML Schema dates and times, Problem–See Also, Ruby example–Ruby example, Limit input to ASCII characters–Limit input to ASCII characters, Limit input to ASCII noncontrol characters and line breaks–Limit input to ASCII noncontrol characters and line breaks, Limit input to shared ISO-8859-1 and Windows-1252 characters–Limit input to shared ISO-8859-1 and Windows-1252 characters, Limit input to alphanumeric characters in any language–Limit input to alphanumeric characters in any language, Problem–See Also, Perl example–Perl example, Limit the length of an arbitrary pattern–Limit the length of an arbitrary pattern, Limit the number of nonwhitespace characters–Limit the number of nonwhitespace characters, Limit the number of words–Limit the number of words, Problem–See Also, PHP (PCRE) example–PHP (PCRE) example, Working with esoteric line separators–Working with esoteric line separators, Problem–See Also, Problem–See Also, Python example–Python example, Find Social Security numbers in documents–Find Social Security numbers in documents, Problem–See Also, Regular expressions–Discussion, Regular expressions–Discussion, ISBN-10 checksum–ISBN-10 checksum, ISBN-13 checksum–ISBN-13 checksum, Find ISBNs in documents–Find ISBNs in documents, Eliminate incorrect ISBN identifiers–Eliminate incorrect ISBN identifiers, Problem–See Also, Problem–See Also, Problem–See Also, Problem–See Also, Problem–See Also, Length between 8 and 32 characters–Length between 8 and 32 characters, ASCII visible and space characters only–ASCII visible and space characters only, One or more uppercase letters–One or more uppercase letters, One or more lowercase letters–One or more lowercase letters, One or more lowercase letters–One or more special characters, One or more special characters–One or more special characters, Disallow three or more sequential identical characters–Disallow three or more sequential identical characters, Example JavaScript solution, basic–Example JavaScript solutions, Validate multiple password rules with a single regex–Validate multiple password rules with a single regex, Problem–See Also, Strip spaces and hyphens–Strip spaces and hyphens, Validate the number–Validate the number, Validate the number–Incorporating the solution into a web page, Strip spaces and hyphens–Strip spaces and hyphens, Validate the number–Validate the number, Extra Validation with the Luhn Algorithm–Extra Validation with the Luhn Algorithm, Problem–See Also, Problem–See Also, Problem–See Also, Problem–See Also, Problem–Discussion, Problem–Discussion, Problem–Discussion, Problem–Discussion, Problem–See Also, Problem–See Also, Drive letter paths–Drive letter, UNC, and relative paths, Drive letter and UNC paths–Drive letter and UNC paths, Drive letter, UNC, and relative paths–Drive letter, UNC, and relative paths, Drive letter, UNC, and relative paths–Drive letter, UNC, and relative paths, Find valid XML comments–Find valid XML comments
    affirmative responses, Problem–See Also
    Canadian postal codes, Problem–See Also
    comments, in XML-style tags, Find valid XML comments–Find valid XML comments
    credit card numbers, Problem–See Also, Strip spaces and hyphens–Strip spaces and hyphens, Validate the number–Validate the number, Validate the number–Incorporating the solution into a web page, Strip spaces and hyphens–Strip spaces and hyphens, Validate the number–Validate the number, Extra Validation with the Luhn Algorithm–Extra Validation with the Luhn Algorithm
    stripping spaces and hyphens, Strip spaces and hyphens–Strip spaces and hyphens, Strip spaces and hyphens–Strip spaces and hyphens
    using in web page, Validate the number–Incorporating the solution into a web page
    validating number, Validate the number–Validate the number, Validate the number–Validate the number
    with Luhn algorithm, Extra Validation with the Luhn Algorithm–Extra Validation with the Luhn Algorithm
    dates, Problem–See Also
    domain names, Problem–See Also
    email addresses, Simple–Variations, Simple–Simple, Simple, with restrictions on characters–Simple, with restrictions on characters, Simple, with all valid local part characters–Simple, with all valid local part characters, No leading, trailing, or consecutive dots–No leading, trailing, or consecutive dots, Top-level domain has two to six letters–Top-level domain has two to six letters, About email addresses–Building a regex step-by-step
    no leading, trailing, or consecutive dots, No leading, trailing, or consecutive dots–No leading, trailing, or consecutive dots
    overview, About email addresses–Building a regex step-by-step
    simple, Simple–Simple
    top-level domain has two to six letters, Top-level domain has two to six letters–Top-level domain has two to six letters
    with all valid local part characters, Simple, with all valid local part characters–Simple, with all valid local part characters
    with restrictions on characters, Simple, with restrictions on characters–Simple, with restrictions on characters
    finding addresses with Post Office boxes, Problem–See Also
    ISBNs, Problem–See Also, Regular expressions–Discussion, Regular expressions–Discussion, ISBN-10 checksum–ISBN-10 checksum, ISBN-13 checksum–ISBN-13 checksum, Find ISBNs in documents–Find ISBNs in documents, Eliminate incorrect ISBN identifiers–Eliminate incorrect ISBN identifiers
    eliminating incorrect ISBN identifiers, Eliminate incorrect ISBN identifiers–Eliminate incorrect ISBN identifiers
    finding in documents, Find ISBNs in documents–Find ISBNs in documents
    in JavaScript, Regular expressions–Discussion
    in Python, Regular expressions–Discussion
    ISBN-10 checksum, ISBN-10 checksum–ISBN-10 checksum
    ISBN-13 checksum, ISBN-13 checksum–ISBN-13 checksum
    ISO 8601 dates and times, Problem–See Also, Dates–Dates, Weeks–Weeks, Times–Times, Date and time–Date and time, XML Schema dates and times–XML Schema dates and times
    date and time, Date and time–Date and time
    dates, Dates–Dates
    times, Times–Times
    weeks, Weeks–Weeks
    XML Schema dates and times, XML Schema dates and times–XML Schema dates and times
    limiting length of text, Problem–See Also, Perl example–Perl example, Limit the length of an arbitrary pattern–Limit the length of an arbitrary pattern, Limit the number of nonwhitespace characters–Limit the number of nonwhitespace characters, Limit the number of words–Limit the number of words
    for arbitrary pattern, Limit the length of an arbitrary pattern–Limit the length of an arbitrary pattern
    in Perl, Perl example–Perl example
    number of words, Limit the number of words–Limit the number of words
    using lookahead, Limit the number of nonwhitespace characters–Limit the number of nonwhitespace characters
    limiting number of lines in text, Problem–See Also, PHP (PCRE) example–PHP (PCRE) example, Working with esoteric line separators–Working with esoteric line separators
    in PHP, PHP (PCRE) example–PHP (PCRE) example
    with esoteric line separators, Working with esoteric line separators–Working with esoteric line separators
    limiting to alphanumeric characters, Problem–See Also, Ruby example–Ruby example, Limit input to ASCII characters–Limit input to ASCII characters, Limit input to ASCII noncontrol characters and line breaks–Limit input to ASCII noncontrol characters and line breaks, Limit input to shared ISO-8859-1 and Windows-1252 characters–Limit input to shared ISO-8859-1 and Windows-1252 characters, Limit input to alphanumeric characters in any language–Limit input to alphanumeric characters in any language
    ASCII characters, Limit input to ASCII characters–Limit input to ASCII characters
    ASCII non-control characters and line breaks, Limit input to ASCII noncontrol characters and line breaks–Limit input to ASCII noncontrol characters and line breaks
    in any language, Limit input to alphanumeric characters in any language–Limit input to alphanumeric characters in any language
    in Ruby, Ruby example–Ruby example
    shared ISO-8859-1 and Windows-1252 characters, Limit input to shared ISO-8859-1 and Windows-1252 characters–Limit input to shared ISO-8859-1 and Windows-1252 characters
    password complexity, Problem–See Also, Length between 8 and 32 characters–Length between 8 and 32 characters, ASCII visible and space characters only–ASCII visible and space characters only, One or more uppercase letters–One or more uppercase letters, One or more lowercase letters–One or more lowercase letters, One or more lowercase letters–One or more special characters, One or more special characters–One or more special characters, Disallow three or more sequential identical characters–Disallow three or more sequential identical characters, Example JavaScript solution, basic–Example JavaScript solutions, Validate multiple password rules with a single regex–Validate multiple password rules with a single regex
    ASCII visible and space characters only, ASCII visible and space characters only–ASCII visible and space characters only
    disallowing three or more sequential identical characters, Disallow three or more sequential identical characters–Disallow three or more sequential identical characters
    in JavaScript, Example JavaScript solution, basic–Example JavaScript solutions
    length between 8 and 32 characters, Length between 8 and 32 characters–Length between 8 and 32 characters
    multiple password rules with single regex, Validate multiple password rules with a single regex–Validate multiple password rules with a single regex
    one or more lowercase letters, One or more lowercase letters–One or more lowercase letters
    one or more numbers, One or more lowercase letters–One or more special characters
    one or more special characters, One or more special characters–One or more special characters
    one or more uppercase letters, One or more uppercase letters–One or more uppercase letters
    phone numbers, Problem–See Also, Problem–See Also
    international, Problem–See Also
    North American, Problem–See Also
    Social Security numbers, Problem–See Also, Python example–Python example, Find Social Security numbers in documents–Find Social Security numbers in documents
    finding in documents, Find Social Security numbers in documents–Find Social Security numbers in documents
    in Python, Python example–Python example
    times, Problem–See Also
    U.K. postcodes, Problem–See Also
    URLs, Problem–See Also, Problem–See Also, Problem–Discussion, Problem–Discussion, Problem–Discussion, Problem–Discussion
    while extracting host, Problem–Discussion
    while extracting port, Problem–Discussion
    while extracting scheme, Problem–Discussion
    while extracting user, Problem–Discussion
    URNs, Problem–See Also
    VAT numbers, Problem–See Also
    Windows paths, Problem–See Also, Drive letter paths–Drive letter, UNC, and relative paths, Drive letter and UNC paths–Drive letter and UNC paths, Drive letter, UNC, and relative paths–Drive letter, UNC, and relative paths, Drive letter, UNC, and relative paths–Drive letter, UNC, and relative paths
    drive letter paths, Drive letter paths–Drive letter, UNC, and relative paths
    relative paths, Drive letter, UNC, and relative paths–Drive letter, UNC, and relative paths
    UNC paths, Drive letter and UNC paths–Drive letter and UNC paths, Drive letter, UNC, and relative paths–Drive letter, UNC, and relative paths
    ZIP codes, Problem–See Also
    Value property (.NET), .NET, .NET, .NET, .NET, C#, C#, VB.NET, VB.NET
    variable repetition, quantifiers for, Variable repetition–Variable repetition
    VAT numbers, validating, Problem–See Also, Strip whitespace and punctuation–Strip whitespace and punctuation, Validate the number–Validate the number
    stripping whitespace and punctuation, Strip whitespace and punctuation–Strip whitespace and punctuation
    validating number, Validate the number–Validate the number
    VB.NET, Languages Covered in This Chapter, Languages Covered in This Chapter, VB.NET–VB.NET, VB.NET–VB.NET, Discussion–Discussion, C# and VB.NET, C# and VB.NET–C# and VB.NET, VB.NET–VB.NET, VB.NET–Discussion, Problem–Discussion, VB.NET–VB.NET, VB.NET–VB.NET, Problem–Discussion, Problem–Python, VB.NET–VB.NET, Problem–See Also, VB.NET example–VB.NET example
    (see also .NET Framework)
    matches in, C# and VB.NET, C# and VB.NET–C# and VB.NET, VB.NET–VB.NET, VB.NET–Discussion, Problem–Discussion, VB.NET–VB.NET, VB.NET–VB.NET, Problem–Discussion, Problem–Python
    finding within another match, Problem–Discussion
    replacing all between matches of another regex, Problem–Python
    replacing all using parts of match text, VB.NET–VB.NET
    replacing all with replacements generated in code, VB.NET–VB.NET
    replacing all within matches of another regex, Problem–Discussion
    retrieving part of string, VB.NET–VB.NET
    testing entire string, C# and VB.NET–C# and VB.NET
    testing in string, C# and VB.NET
    validating in procedural code, VB.NET–Discussion
    parsing string for import into application, Problem–See Also
    regular expression library for, VB.NET–VB.NET
    regular expression objects in, compiling to CIL, Discussion–Discussion
    searching line by line in, VB.NET–VB.NET
    strings in, for regex, VB.NET–VB.NET
    validating ZIP codes in, VB.NET example–VB.NET example
    VBScript, Regex Flavors Covered by This Book
    verbatim strings, in C#, C#
    versions, Introduction to Regular Expressions (see flavors)
    Visual Basic 6, More Programming Languages–More Programming Languages
    Visual Studio (VS), Regex Flavors Covered by This Book