effective_awk.pdf

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Ed
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awk
Programming
UNIVERSAL TEXT PROCESSING AND PATTERN MATCHING
Effective
Arnold Robbins
Effective awk Programming
When processing text files, the
awk
language is ideal for handling data
extraction, reporting, and data-reformatting jobs. This practical guide
serves as both a reference and tutorial for POSIX-standard
awk
and for the
GNU implementation, called
gawk.
This book is useful for novices and
awk
experts alike.
In this thoroughly revised edition, author and
gawk
lead developer Arnold
Robbins describes the
awk
language and
gawk
program in detail, shows you
how to use
awk
and
gawk
for problem solving, and then dives into specific
features of
gawk.
System administrators, programmers, webmasters, and
other power users will find everything they need to know about
awk
and
gawk.
You will learn how to:
■
■
■
■
■
“
Arnoldhasdistilledover
twoandahalfdecadesof
experiencewritingand
usingawkprograms,and
developinggawk,intothis
book.Ifyouuseawkor
wanttolearnhow,then
readthisbook.
—Michael Brennan
author of
mawk
”
Format text and use regular expressions in
awk
and
gawk
Process data using
awk's
operators and built-in functions
Manage data relationships using associative arrays
Define your own functions
“Think in
awk”
with two full chapters of sample functions and
programs
Take advantage of
gawk's
many advanced features
Debug
awk
programs with the
gawk
built-in debugger
■
■
This book is published under the terms of the GNU Free Documentation
License.
You have the freedom to copy and modify this GNU manual.
Royalties from the sales of this book go to the Free Software Foundation
and to the author.
Arnold Robbins,
a professional programmer and technical author, has worked with
Unix systems since 1980 and has used
awk
since 1987. Arnold is the maintainer of
gawk
and its documentation. As a member of the POSIX 1003.2 balloting group, he
helped shape the POSIX standard for
awk.
TEX T PROCESSING
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ISBN: 978-1-491-90461-9
FOURTH EDITION
Effective awk Programming
Arnold Robbins
Effective awk Programming, Fourth Edition
by Arnold Robbins
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Editors:
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Production Editor:
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Copyeditor:
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March 2015:
Fourth Edition
Indexer:
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2015-02-27:
First release
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ISBN: 978-1-491-90461-9
[LSI]
To my parents, for their love, and for the wonderful example they set for me.
To my wife Miriam, for making me complete. Thank you for building your life together
with me.
To our children Chana, Rivka, Nachum, and Malka, for enrichening our lives in
innumerable ways.

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