Download - The Bastards Book of Regular Expressions

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Your first regexLet’s try writing our first regular expression.1. Open up your text editor and type in the following:hi world2. Pop open the Find-and-Replace dialog menu. You can do this either with the keyboardshortcut, usually Ctrl-F or Cmd-F (this is the most efficient way to do this). Or you cango up to the menubar.Here’s how to do it in Textwrangler (Mac):search submenuAnd in Notepad++ (Windows):(Todo): Image3. Our goal is to replace hi with hello. So in the Find field, type in:hi4. In the Replace field, type in23
Your first regex 24hello<strong>The</strong> Find-and-Replace dialog should look like this:find-replace-hello
Page 1: The Bastards Book ofRegular Express
Page 5 and 6: CONTENTSOptionality and alternation
Page 7 and 8: CONTENTSSwitching visualizations (T
Page 9 and 10: Regular Expressions are for Everyon
Page 11 and 12: Regular Expressions are for Everyon
Page 13 and 14: Getting Started6
Page 15 and 16: Finding a proper text editor 8Notep
Page 17 and 18: Finding a proper text editor 10Edit
Page 19 and 20: Finding a proper text editor 12Text
Page 21 and 22: Finding a proper text editor 14does
Page 23 and 24: Finding a proper text editor 16Yest
Page 25 and 26: Finding a proper text editor 18A do
Page 27 and 28: A better Find-and-Replace 20The lim
Page 29: A better Find-and-Replace 22Using R
Page 33 and 34: Your first regex 26The regex syntax
Page 35 and 36: Your first regex 28Double-bounded
Page 37 and 38: Your first regex 30AnswerFind \bcat
Page 39 and 40: Removing emptinessIt’s funny how
Page 41 and 42: Removing emptiness 34Now let’s do
Page 43 and 44: Removing emptiness 36…as opposed
Page 45 and 46: Removing emptiness 38Replacement in
Page 47 and 48: Match one-or-more with the plus sig
Page 55 and 56: Match zero-or-more with the star si
Page 57 and 58: Specific and limited repetition 501
Page 59 and 60: Specific and limited repetition 52E
Page 61 and 62: Specific and limited repetition 54C
Page 63 and 64: Anchors: A way to trim emptinessIn
Page 65 and 66: Anchors: A way to trim emptiness 58
Page 71 and 72: Matching any letter, any number 64A
Page 73 and 74: Matching any letter, any number 66W
Page 75 and 76: Matching any letter, any number 68[
Page 77 and 78: Matching any letter, any number 70R
Page 79 and 80: Matching any letter, any number 72F
Page 81 and 82:
Matching any letter, any number 74A
Page 83 and 84:
Negative character sets 76$1,200.00
Page 85 and 86:
Negative character sets 78\W+Exerci
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Capture, Reuse 80Find (ba)+Matches
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Capture, Reuse 82.- then the 1st ba
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Capture, Reuse 84In English We are
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Capture, Reuse 86ApplesOraclesOrang
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Capture, Reuse 8805-14-8912-03-9803
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Capture, Reuse 90Mary asked: "What
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Optionality and alternationThe two
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Optionality and alternation 94Answe
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Optionality and alternation 96Studi
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Optionality and alternation 98You m
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Laziness and greediness 100Being to
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Laziness and greediness 102Replace
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Laziness and greediness 104With the
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Lookarounds 106cat(?=s)- will match
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Lookarounds 108`(?
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Lookarounds 110ExerciseGiven the fo
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Lookarounds 112City,CountryAlbuquer
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Lookarounds 114Given this list of c
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Lookarounds 116100,J.D. Salinger Av
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Lookarounds 1186,300|Apples|New Yor
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Lookarounds 120^(\d+) Record ID (\w
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Lookarounds 122d. Remove all asides
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From Data to HTML (TODO)This chapte
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From Data to HTML (TODO) 126Turning
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The ExercisesI’ve never been one
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Data Cleaning with the Stars 130LOR
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Data Cleaning with the Stars 132[GM
Page 141 and 142:
Finding needles in haystacks (TODO)
Page 143 and 144:
Changing phone format (TODO)Todo: T
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Changing phone format (TODO) 138Exe
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Changing phone format (TODO) 140Ans
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Changing phone format (TODO) 142`1-
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Changing phone format (TODO) 144(\d
Page 153 and 154:
Dating, Associated Press Style (TOD
Page 155 and 156:
Page 157 and 158:
Page 159 and 160:
Page 161 and 162:
Sorting a police blotter 154Sloppy
Page 163 and 164:
Sorting a police blotter 156I used
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Converting XML to tab-delimited dat
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Converting XML to tab-delimited dat
Page 169 and 170:
Cleaning up Microsoft Word HTML(TOD
Page 171 and 172:
Cleaning up OCR Text (TODO)Image sc
Page 173 and 174:
Moving forwardThank you for taking
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