Effective awk Programming delivers complete coverage of the awk 3.1 language and the most up-to-date coverage of the POSIX standard for awk available anywhere. Author Arnold Robbins clearly distinguishes standard awk features from GNU awk (gawk)-specific features, shines light into many of the "dark corners" of the language and devotes two full chapters to example programs. This book is the official "User's Guide" for the GNU implementation of awk.