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Overview"sed & awk 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 edition covers features of sed and awk that are 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)." Full Product DetailsAuthor: Dale Dougherty , Arnold RobbinsPublisher: O'Reilly Media Imprint: O'Reilly Media Edition: 2nd Revised edition Dimensions: Width: 18.00cm , Height: 2.30cm , Length: 23.40cm Weight: 0.722kg ISBN: 9781565922259ISBN 10: 1565922255 Pages: 432 Publication Date: 08 April 1997 Recommended Age: 18+ Audience: College/higher education , Professional and scholarly , Undergraduate , Postgraduate, Research & Scholarly Format: Paperback Publisher's Status: Active Availability: To order  Stock availability from the supplier is unknown. We will order it for you and ship this item to you once it is received by us. Table of ContentsReviewsAuthor Information"Dale Dougherty is president and CEO of Songline Studios, a leading web publishing company. He is editor and publisher of Web Review (webreview.com), an innovative online magazine for web site developers. Prior to Songline, Dougherty developed the Global Network Navigator (GNN) and was the founding editor for O'Reilly's Nutshell Handbooks (R). Arnold Robbins, an Atlanta native, is a professional programmer and technical author. He has been working with UNIX systems since 1980, when he was intoduced to a PDP-11 running a version of Sixth Edition UNIX. He has been a heavy awk user since 1987, when he became involved with gawk, the GNU project's version of awk. As a member of the POSIX 1003.2 balloting group, he helped shape the POSIX standard for awk. He is currently the maintainer of gawk and its documentation. The documentation is available from the Free Software Foundation (http://www.gnu.org) and has also been published by SSC (http://www.ssc.com) as ""Effective AWK Programming."" He is also co-author of the sixth edition of O'Reilly's Learning the vi Editor. Since late 1997, he and his family have been living happily in Israel." Tab Content 6Author Website:Countries AvailableAll regions |
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