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Topic: Awk


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 Hartigan/Computer/AWK
Awk considers the input from 'cat file1' one line at a time, and tries to match the 'pattern'.
Awk is an powerful command language that allows the user to manipulate files containing columns of data and strings.
Awk is extremely useful, both for general operation of Unix commands, and for data reduction (e.g.
http://sparky.rice.edu/~hartigan/awk.html

  
 FREC 682 Spatial Analysis -- AWK Filters
AWK is a Unix programming language named for its developers (Aho, Weinberger and Kernighan).
If an input file or output file are not specified, awk will expect input from stdin or output to stdout.
AWK is very flexible about matching character or numeric patterns.
http://www.udel.edu/johnmack/frec682/682awk.html

  
 [2.0] Awk Syntax
Awk will scan each in turn and generate a continuous output from the contents of the multiple files.
Awk also supports null strings, which are represented by empty quotes: "".
Awk will follow its own rules in this issue and so it is important for the programmer to remember it and avoid possible traps.
http://www.vectorsite.net/tsawk2.html

  
 AN INTRODUCTION TO AWK
awk is a programming language designed to search for, match patterns, and perform actions on files.
awk scans input lines one after the other, searching each line to see if it matches a set of patterns or conditions specified in the awk program.
awk provides the function getline to read input from the current input file or from a file or pipe.
http://allman.rhon.itam.mx/dcomp/awk.html

  
 AWK: Linux Administrator's Wisdom Kit
When first created, AWK was designed to work in the text-processing arena, and the language is based on executing a series of instructions whenever a pattern is matched in the input data.
The AWK tool can read its input from a file, as was done in all examples up to this point, or it can take input from the output of another command.
You must enclose the file name in quotes, or else it is simply an uninitialized AWK variable, and the combination of instructions generates an error from AWK.
http://www.oracle.com/technology/pub/articles/dulaney_awk.html

  
 The GNU Awk User's Guide
AWK's simple programming paradigm--find a pattern in the input and then perform an action--often reduced complex or tedious data manipulations to few lines of code.
The programs in this book make clear that an AWK program is typically much smaller and faster to develop than a counterpart written in C. Consequently, there is often a payoff to prototype an algorithm or design in AWK to get it running quickly and expose problems early.
On the other hand, the novice AWK programmer can study a wealth of practical programs that emphasize the power of AWK's basic idioms: data driven control-flow, pattern matching with regular expressions, and associative arrays.
http://www.delorie.com/gnu/docs/gawk/gawk_1.html

  
 UNIX man pages : awk ()
The original version of UNIX awk was designed and implemented by Alfred Aho, Peter Weinberger, and Brian Kernighan of Bell Laboratories.
-W gen-po --gen-po Scan and parse the AWK program, and generate a GNU.po format file on standard output with entries for all localizable strings in the program.
Applications came to depend on this "feature." When awk was changed to match its documentation, the -v option for assigning variables before program execution was added to accommodate applications that depended upon the old behavior.
http://unixhelp.ed.ac.uk/CGI/man-cgi?awk

  
 Getting Started with awk
awk reads from a file or from its standard input, and outputs to its standard output.
awk variables are initialized to either zero or the empty string the first time they are used.
Awk has other built in math functions like sine; read the manpage to see which ones.
http://www.cs.hmc.edu/tech_docs/qref/awk.html

  
 Awk - A Tutorial and Introduction - by Bruce Barnett
AWK also has associative arrays, which are incredible useful, and is a feature most computing languages lack.
AWK can be used to parse many system administration files.
The work "AWK" is derived from the initials of the language's three developers: A. Aho, B.
http://www.grymoire.com/Unix/Awk.html

  
 AWK
Awk is a programming language whose basic operation is to search a set of files for patterns, and to perform specified actions upon lines or fields of lines which contain instances of those patterns.
awk is distributed as free software, meaning that you don't have to pay anything for it and you can get the source code to build awk yourself.
In reality AWK much better integrates with Unix shell and until probably in 2004 there is not noticeable difference in speed due to the additional time to load and initialize huge Perl interpreter (but Perl 5 still grows and soon might be too fat even for the typical PC or server).
http://www.softpanorama.org/Tools/awk.shtml

  
 Debian -- mawk
The AWK language is useful for manipulation of data files, text retrieval and processing, and for prototyping and experimenting with algorithms.
Mawk is a new awk meaning it implements the AWK language as defined in Aho, Kernighan and Weinberger, The AWK Programming Language, Addison-Wesley Publishing, 1988.
Mawk is an interpreter for the AWK Programming Language.
http://packages.debian.org/stable/base/mawk.html

  
 Awk
This makes awk ideal for handling structured text files -- especially tables -- data organized into consistent chunks, such as rows and columns.
The only other feature of awk we need to deal with here is variables.
, for a code block to be performed before awk starts processing its input.
http://www.tldp.org/LDP/abs/html/awk.html

  
 awk
The awk utility executes programs written in the awk programming language, which is specialised for textual data manipulation.
The awk utility interprets each input record as a sequence of fields where, by default, a field is a string of non-blank characters.
Because awk arrays are really one dimensional, such a comma-separated list will be converted to a single string by concatenating the string values of the separate expressions, each separated from the other by the value of the SUBSEP variable.
http://www.opengroup.org/onlinepubs/007908799/xcu/awk.html

  
 Amazon.com: Books: The AWK Programming Language
For some tasks awk is the premier solution, for others, use awk as part of the solution along with perl and a shell script.
The examples illustrates the book's three themes: showing how to use AWK well, demonstrating AWK's versatility, and explaining how common computing operations are done.
At work we cant use perl on our unix servers because of management attitudes so awk and sh are the only tools to script with.
http://www.amazon.com/exec/obidos/tg/detail/-/020107981X?v=glance

  
 The AWK Programming Language
AWK is also available from GNU (GAWK); MKS as part of the MKS Toolkit; Thompson Automation Software (TAWK).
Japanese: Programming Language AWK, Kyoritsu Shuppan, ISBN 4-8101-8008-5.
Examples from The AWK Programming Language by Aho, Kernighan, and Weinberger as text (120Kb) or zipped (30Kb).
http://cm.bell-labs.com/cm/cs/awkbook

  
 Hanoi: AWK
Details of the GNU implementation of AWK (gawk) can be found on the gawk home page.
He is also the author of the popular book The AWK Programming Language.
Brian Kernighan (the 'K' in AWK) has various interesting tidbits about AWK on his home page.
http://www.kernelthread.com/hanoi/html/awk.html

  
 Gavin Wraith's HomePage: index
Awk for RISC OS Whether or not you consider yourself a programmer, the very fact that you use Risc OS suggests that you are probably an active user of your computer, and hence that you are likely to find Awk a useful tool.
Read what a Professor of AI has to say about Awk
The original version of Awk was created in 1977 at AT&T Bell Laboratories, as a tool for extracting information from text.
http://www.wra1th.plus.com/awk

  
 awk -- data transformation, report generation language
This version is a superset of New AWK as described in The AWK Programming Language by Aho, Weinberger, and Kernighan.
See Table 2, awk Order of Operations for the precedence rules of the operators.
Variable initializations that appear before the first file on the command line are performed immediately after the
http://www.datafocus.com/docs/man1/awk.1.asp

  
 Gawk - GNU Project - Free Software Foundation (FSF)
The source code for GNU awk is available from the GNU project's ftp server.
The awk utility interprets a special-purpose programming language that makes it possible to handle simple data-reformatting jobs with just a few lines of code.
The job is easy with awk, especially the GNU implementation: gawk.
http://www.gnu.org/software/gawk/gawk.html

  
 Phils AWK programming guide
The first one is not a truely robust program, but it does the basic job pretty durn well.
Hopefully, the HTML format will be much more enlightening to you than your average man-page.
This is an introduction to AWK that focuses on showing you the most useful features of AWK.
http://www.bolthole.com/AWK.html

  
 UNIX Utilities - awk
The original version, based on the first edition of The awk Programming Language was called awk
Operators - awk has many of the same operators as C, excepting the bit operators.
General structure of awk (Aho, Weinberg, and Kernighan)
http://www.uga.edu/~ucns/wsg/unix/awk

  
 Unix for Linguists: Filter Languages
For instance, one can perform text analysis on Usenet posts using awk.
('Gnu awk'), part of the Gnu operating system from Free Software Foundation.
It can do anything that sed can, but sed is faster and simpler for what it does.
http://www-personal.umich.edu/~jlawler/routledge/sedawkperl.html

  
 oreilly.com -- Online Catalog: sed & awk, Second Edition
sed & awk describes two text manipulation programs that are mainstays of the UNIX programmer's toolbox.
This edition covers the sed and awk programs as they are mandated by the POSIX standard and includes discussion of the GNU versions of these programs.
Register your book to get email notification of new editions, special offers, and more.
http://www.oreilly.com/catalog/sed2

  
 AWK manual
This manual is for the new implementation of AWK (sometimes called
Awk manual in Postscript format (US letter size)
This is the location for the AWK manual.
http://www.cs.uu.nl/~piet/docs/nawk

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