正则表达式入门 英文PDF电子书下载

1．What Is a Regular Expression? 1

Getting Started with Regexpal 2

Matching a North American Phone Number 2

Matching Digits with a Character Class 4

Using a Character Shorthand 5

Matching Any Character 5

Capturing Groups and Back References 6

Using Quantifiers 6

Quoting Literals 8

A Sample of Applications 9

What You Learned in Chapter 1 11

Technical Notes 11

2．Simple Pattern Matching 13

Matching String Literals 15

Matching Digits 15

Matching Non-Digits 17

Matching Word and Non-Word Characters 18

Matching Whitespace 20

Matching Any Character,Once Again 22

Marking Up the Text 24

Using sed to Mark Up Text 24

Using Perl to Mark Up Text 25

What You Learned in Chapter 2 27

Technical Notes 27

3．Boundaries 29

The Beginning and End of a Line 29

Word and Non-word Boundaries 31

Other Anchors 33

Quoting a Group of Characters as Literals 34

Adding Tags 34

Adding Tags with sed 36

Adding Tags with Perl 37

What You Learned in Chapter 3 38

Technical Notes 38

4．Alternation,Groups,and Backreferences 41

Alternation 41

Subpatterns 45

Capturing Groups and Backreferences 46

Named Groups 48

Non-Capturing Groups 49

Atomic Groups 50

What You Learned in Chapter 4 50

Technical Notes 51

5．Character Classes 53

Negated Character Classes 55

Union and Difference 56

POSIX Character Classes 56

What You Learned in Chapter 5 59

Technical Notes 60

6．Matching Unicode and Other Characters 61

Matching a Unicode Character 62

Using vim 63

Matching Characters with Octal Numbers 64

Matching Unicode Character Properties 65

Matching Control Characters 68

What You Learned in Chapter 6 70

Technical Notes 71

7．Quantifiers 73

Greedy,Lazy,and Possessive 74

Matching with*,+,and? 74

Matching a Specific Number of Times 75

Lazy Quantifiers 76

Possessive Quantifiers 76

What You Learned in Chapter 7 78

Technical Notes 79

8．Lookarounds 81

Positive Lookaheads 81

Negative Lookaheads 84

Positive Lookbehinds 85

Negative Lookbehinds 85

What You Learned in Chapter 8 86

Technical Notes 86

9．Marking Up a Document with HTML 87

Matching Tags 87

Transforming Plain Text with sed 88

Substitution with sed 89

Handling Roman Numerals with sed 90

Handling a Specific Paragraph with sed 91

Handling the Lines of the Poem with sed 91

Appending Tags 92

Using a Command File with sed 92

Transforming Plain Text with Perl 94

Handling Roman Numerals with Perl 95

Handling a Specific Paragraph with Perl 96

Handling the Lines of the Poem with Perl 96

Using a File of Commands with Perl 97

What You Learned in Chapter 9 98

Technical Notes 98

10．The End of the Beginning 101

Learning More 102

Notable Tools,Implementations,and Libraries 103

Perl 103

PCRE 103

Ruby(Oniguruma) 104

Python 104

RE2 105

Matching a North American Phone Number 105

Matching an Email Address 105

What You Learned in Chapter 10 106

Appendix:Regular Expression Reference 107

Regular Expression Glossary 123

Index 129