文档介绍：Powerful Techniques for Perl and Other Tools
Mastering
Regular
Expressions
Jeffrey E. F. Friedl
Ta ble of Contents
Preface ..................................................................................................................... xv
1: Introduction to Regular Expressions ...................................................... 1
Solving Real Problems ........................................................................................ 2
Regular Expressions as a Language ................................................................... 4
The Filename Analogy ................................................................................. 4
The Language Analogy ................................................................................ 5
The Regular-Expr ession Frame of Mind ............................................................ 6
If You Have Some Regular-Expr ession Experience ................................... 6
Searching Text Files: Egrep ......................................................................... 6
Egr ep Metacharacters .......................................................................................... 8
Start and End of the Line ............................................................................. 8
Character Classes .......................................................................................... 9
Matching Any Character with Dot ............................................................. 11
Alter nation .................................................................................................. 13
Ignoring Differ ences in Capitalization ...................................................... 14
Word Boundaries ........................................................................................ 15
In a Nutshell ............................................................................................... 16
Optional Items .....................