Implementation Notes This appendix contains information mainly of interest to implementors and maintainers of gawk. Everything in it applies specifically to gawk and not to other implementations. All of these features can be turned off by invoking gawk with the --traditional option or with the --posix option. If gawk is compiled for debugging with -DDEBUG, then there is one more option available on the command line: -W parsedebug --parsedebug Prints out the parse stack information as the program is being parsed. This option is intended only for serious gawk developers and not for the casual user.
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Whether you are starting out with awk or are an experienced developer, this book will help you extend the reach of your awk scripts. This tutorial covers the entire spectrum of awk sc This tutorial covers the entire spectrum of awk script development: From the basics of opening, searching, and transforming text files, to a comprehensive tutorial for regular expressions, to more advanced features like internetworking.
The book begins with the fundamentals of awk for opening and transforming text flat files. The coverage of regular expressions, from simple rules for matching text to more advanced options, is particularly solid. You learn how to add variables and expressions for more intelligent awk scripts, plus how to parse data into records and fields.
Later, you learn several valuable sample awk scripts that mimic existing Unix utilities like grep, id, and split , plus samples for counting words in documents and printing mailing labels, and even a stream editor. This grab bag of sample code lets you try out the techniques presented earlier in the book. Full sample code will teach the beginner or expert how to get productive with networks and awk. Final appendices trace the evolution of the awk language and show you how to download and install gawk.
Effective awk Programming, 3rd Edition by Arnold Robbins
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Effective awk Programming, 3rd Edition