Sed and Awk: Pocket Reference, 2nd Edition

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9780596003524: Sed and Awk: Pocket Reference, 2nd Edition

For people who create and modify text files, sed and awk are power tools for editing. sed, awk, and regular expressions allow programmers and system administrators to automate editing tasks that need to be performed on one or more files, to simplify the task of performing the same edits on multiple files, and to write conversion programs.The sed & awk Pocket Reference is a companion volume to sed & awk, Second Edition, Unix in a Nutshell, Third Edition, and Effective awk Programming, Third Edition. This new edition has expanded coverage of gawk (GNU awk), and includes sections on:

  • An overview of sed and awk?s command line syntax
  • Alphabetical summaries of commands, including nawk and gawk
  • Profiling with pgawk
  • Coprocesses and sockets with gawk
  • Internationalization with gawk
  • A listing of resources for sed and awk users
This small book is a handy reference guide to the information presented in the larger volumes. It presents a concise summary of regular expressions and pattern matching, and summaries of sed and awk.Arnold Robbins, an Atlanta native now happily living in Israel, is a professional programmer and technical author and coauthor of various O'Reilly Unix titles. He has been working with Unix systems since 1980, and currently maintains gawk and its documentation.

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From the Publisher:

sed & awk, one of the most popular books in O'Reilly & Associates' Nutshell series, describes two text processing programs that are mainstays of the UNIX programmer's toolbox. sed is a "stream editor" for editing streams of text that might be too large to edit as a single file, or that might be generated on the fly as part of a larger data processing step. The most common operation done with sed is substitution, replacing one block of text with another. awk is a complete programming language. Unlike many conventional languages, awk is "data driven" -- you specify what kind of data you are interested in and the operations to be performed when that data is found. awk does many things for you, including automatically opening and closing data files, reading records, breaking the records up into fields, and counting the records. While awk provides the features of most conventional programming languages, it also includes some unconventional features, such as extended regular expression matching and associative arrays. sed & awk describes both programs in detail and includes a chapter of example sed and awk scripts. This new edition covers features of sed and awk that are now mandated by the POSIX standard. This most notably affects awk, where POSIX standardized a new variable, CONVFMT, and new functions, toupper() and tolower(). The CONVFMT variable specifies the conversion format to use when converting numbers to strings (awk used to use OFMT for this purpose). The toupper() and tolower() functions each take a (presumably mixed case) string argument and return a new version of the string with all letters translated to the corresponding case. In addition, this edition covers GNU sed, newly available since the first edition. It also updates the first edition coverage of Bell Labs nawk and GNU awk (gawk), covers mawk, an additional freely available implementation of awk, and briefly discusses three commercial versions of awk, MKS awk, Thompson Automation awk (tawk), and Videosoft (VSAwk).

From the Back Cover:

The book begins with an overview and a tutorial that demonstrate a progression in functionality from grep to sed to awk. sed and awk share a similar command-line syntax, accepting user instructions in the form of a script. Because all three programs use UNIX regular expressions, an entire chapter is devoted to understanding UNIX regular expression syntax. Next, the book describes how to write sed scripts. After getting started by writing a few simple scripts, you'll learn other basic commands that parallel manual editing actions, as well as advanced commands that introduce simple programming constructs. Among the advanced commands are those that manipulate the hold space, a set-aside temporary buffer. The second part of the book has been extensively revised to include POSIX awk as well as coverage of three freely available and three commercial versions of awk. The book introduces the primary features of the awk language and how to write simple scripts. You'll also learn: common programming constructs; how to use awk's built-in functions; how to write user-defined functions; debugging techniques for awk programs; how to develop an application that processes an index, demonstrating much of the power of awk; and FTP and contact information for obtaining various versions of awk. Also included is a miscellany of user-contributed scripts that demonstrate a wide range of sed and awk scripting styles and techniques.

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Descripción O Reilly Media, Inc, USA, United States, 2002. Paperback. Estado de conservación: New. 2nd Revised edition. Language: English . Brand New Book. This is a reference guide to the information presented in the larger volumes. It presents a concise summary of regular expressions and pattern matching, and summaries of Sed and Awk. This edition has expanded coverage of Gawk (GNU Awk), and includes sections on: an overview of Sed and Awk s command line syntax; alphabetical summaries of commands, including Nawk and Gawk; profiling with PGawk; coprocesses and sockets with Gawk; internationalization with Gawk; and a listing of resources for Sed and Awk users. Nº de ref. de la librería AAH9780596003524

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Descripción O Reilly Media, Inc, USA, United States, 2002. Paperback. Estado de conservación: New. 2nd Revised edition. Language: English . Brand New Book. This is a reference guide to the information presented in the larger volumes. It presents a concise summary of regular expressions and pattern matching, and summaries of Sed and Awk. This edition has expanded coverage of Gawk (GNU Awk), and includes sections on: an overview of Sed and Awk s command line syntax; alphabetical summaries of commands, including Nawk and Gawk; profiling with PGawk; coprocesses and sockets with Gawk; internationalization with Gawk; and a listing of resources for Sed and Awk users. Nº de ref. de la librería AAH9780596003524

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