AwkChannelWiki: Search for: "comma"

View changes for these pages

AllAboutGetline
//Editor's notes: The article was originally posted on the comp.lang.awk newsgroup, and can still be . . . source for this discussion says: "The getline command is used in several different ways and should . . . beginners. ... come back and study the getline command after you have reviewed the rest ... and have . . . ${1...NF}, NF| |getline var < file|var| |command ~| getline|$0, ${1...NF}, NF| |command ~| getline . . . var|var| |command ~|& getline|$0, ${1...NF}, NF| |command . . .
16K - last updated 2009-02-15 22:14 UTC by waldner

awk nawk oawk
in 1977 there was awk.\\ this page attempts to explain the history of awk.\\ the 1978 7th Edition awk(1) . . . [:digit:]\\ length(arrayname) \\ undocumented command line switch -d dumps debug info.\\ valid filenames . . .
2K - last updated 2012-03-18 23:21 UTC by g0pher

AwkDc
This is an awk implementation of the [http://www.gnu.org/software/bc/manual/dc-1.05/html_mono/dc.html|dc] . . . OPERATOR FUNCTIONS {{{ ---- # -- printing commands function _dc_print(stk) { showop("print") . . . _dc_dispatch(stk, op, num, sig) { # printing commands - complete if (op == "p") { _dc_print(stk) . . .
12K - last updated 2008-07-17 14:47 UTC by gnomon

AwkGuide
** Work in Progress ** {{{ import from Mark Hobley's wiki }}} <toc> ---- == Overview * [[Overview]] . . . == How to awk * [[action]]s * [[arithmetic]] * [[command line parameter|ARGC]] * [[command line parameter|ARGV]] . . . sensitivity]] * [[caveat]]s * [[close]] * [[command]]s * [[command line parameter]]s * [[comment]]s . . .
4K - last updated 2011-08-14 15:57 UTC by markhobley

AwkOnWindowsHowto
AwkOnWindowsHowto\\ rough cut - needs edit {{{ 3) awk command line switches/usage from a win32 cmd.exe . . .
3K - last updated 2010-10-24 07:44 UTC by g0pher

AwkTips
<toc> ---- == Be idiomatic! In this paragraph, we give some hints on how to write more idiomatic . . . another, in the order they are specified on the command line. The special variable NR stores the total . . . file }}} Note that we specify "file file" on the command line, so the file will be read twice. **Caveat:** . . . lines in scripts that look like this: {{{ somecommand | head -n +1 | grep foo | sed 's/foo/bar/' . . . of the pipeline, or even all of it: {{{ somecommand | awk 'NR>1 && /foo/{sub(/foo/,"bar"); . . .
31K - last updated 2009-03-24 16:54 UTC by waldner

Backreferences
The usual (and correct) answer for backreferences in awk (for example, the answer you can get on #awk . . . specification in the s/pattern/replacement/ command: it can either be a number, indicating to replace . . .
3K - last updated 2010-12-30 06:53 UTC by ppp089210039107.dsl.hol.gr

BEGIN
== Begin Blocks The [[awk]] programming language allows us to use **begin blocks** and **end blocks** . . . separator]], but they can contain other commands: {{{ BEGIN { # This is a begin block print . . .
3K - last updated 2013-04-11 14:25 UTC by 92.40.253.171.threembb.co.uk

CAWKLib
=CAWKLib CAWKlib is a library of functions for for awk intended to be used with preprocessors/wrappers . . . low level wrapper function for the 'test' shell command *file_isblock() -- returns 1 if file is a block . . . control system not the image toolkit) #run this command: git clone https://github.com/gcw/CAWKLib.git . . .
5K - last updated 2015-01-29 10:14 UTC by 108-243-116-77.lightspeed.cicril.sbcglobal.net

Columnate
This script columnates the input file, so that columns line up like in the GNU column(1) command. Its . . .
1K - last updated 2009-02-28 21:32 UTC by h-67-101-152-180.nycmny83.dynamic.covad.net

command line parameter
The [[awk]] extraction and reporting language uses traditional conventions for accessing command line . . . parameters. The command line arguments are stored in the [[array]] . . . -f BEGIN { print "There are " ARGC "command line parameters" for(l=1; l<ARGC; l++) { . . .
1K - last updated 2011-06-25 05:49 UTC by pgas

ENVIRON
Modern versions of new awk (gawk, mawk, Bell Labs awk, any POSIX awk) all provide an array named ENVIRON. . . . you can use a pipe from the `env' or `printenv' commands, but this is less pretty, and may be a problem . . .
1K - last updated 2008-11-19 13:13 UTC by pgas

ENVIRONJapanese
Modern versions of new awk (gawk, mawk, Bell Labs awk, any POSIX awk) all provide an array named ENVIRON. . . . you can use a pipe from the `env' or `printenv' commands, but this is less pretty, and may be a problem . . .
1K - last updated 2008-11-24 08:05 UTC by pgas

environment
The ENVIRON [[associative container]] contains the values of the current environment. This enables an . . . spawned from [[awk]], either via the [[system]] command or through [[redirection]]. . . .
1K - last updated 2011-06-07 01:05 UTC by markhobley

EnvVarGeneral
**Answer 1:** On Unix, use "alternate quoting", e.g. {{{ awk -F: '$1 ~ /'"$USER"'/ {print $5}' /etc/passwd . . . your awk supports variable definitions on the command line, e.g., {{{ awk -F: -v name="$USER" '$1 . . . to put things into the environment for a single command run: {{{ name=felix age=56 awk '... ENVIRON["name"] . . . to use a shell script and stretch a long awk command argument in '...' across multiple lines if . . .
3K - last updated 2011-07-05 09:31 UTC by pgas

ExitCode
Normally, the `exit' command exits with a value of zero. You can supply an optional numeric value to . . . the `exit' command to make it exit with a value: {{{ awk if (whatever) . . . transfers there. Within the END block, an `exit' command exits immediately; if you had previously supplied . . .
1K - last updated 2008-11-26 12:30 UTC by pgas

FileAndBitJoinClone
== Problem Description This was difficult to hash out. Eventually the task was described as, "for each . . . 1 -e "EMPTY" - bit.txt # # Note that the above command assumes that bit.txt is already sorted on the . . . with the '-o FORMAT' option of the GNU join command, which is documented # at http://www.gnu.org/software/coreutils/manual/coreutils.html#join-invocation. . . .
7K - last updated 2009-03-08 16:26 UTC by waldner

FirstFile
you can tell if awk is parsing the first file given on the command line using FILENAME, thusly: {{{ awk . . .
1K - last updated 2008-11-18 13:34 UTC by pgas

FirstFileJapanese
you can tell if awk is parsing the first file given on the command line using FILENAME, thusly: {{{ awk . . .
1K - last updated 2008-11-24 08:09 UTC by pgas

FIXES
[[FIXES]]        revised:   . . . (Oct xx, 1987)\\ recognize -- as terminator of command-line options\\ evaluate all arguments of built-in . . . permitted.\\ \\ fixed order of evaluation of commandline assignments to match what the\\     book . . . (Jun 14, 1989)\\ added -v x=1 ... for immediate commandline variable assignment;\\     done . . . if the program is on the commandline.\\     requires . . .
6K - last updated 2014-01-15 23:17 UTC by g0ph3r

FS
= Field Separator = The [[special variable]] FS is a field separator that is used to determine how [[awk]] . . . This gives Rhubarb }}} Note that the second awk command gives a different result, because the leading . . . The default field separator can be changed by a command line switch == The -F command line switch enables . . . to be changed. This variable can be set on the command line. === Example === The /etc/passwd has its . . . treat t as just a normal letter ** {{{ If the -F command line switch is given a single letter t as a . . .
5K - last updated 2013-02-19 21:45 UTC by markhobley

GeneralizedTextReplacement
Some times people need to recode in awk something they were previously doing with sed or another tool. . . . awk (specifically, the s/pattern/replacement/ command), establishing a basic framework to emulate . . . the "s" command (and do some things that sed cannot do as well); . . . how that fits in the framework. So, the only sed command worth discussing is s/pattern/replacement/, . . . clearly). You can emulate sed's 's/foo/bar/' command quite faithfully in awk using sub() (to replace . . .
6K - last updated 2009-03-26 20:38 UTC by waldner

getline
The *getline* command can obtain input from any number of files and does not require a command line parameter . . .
1K - last updated 2011-05-02 20:14 UTC by markhobley

hashbang
== A script can be treated as an executable file by using a hashbang == It is possible for an awk script . . . a switch === Because of the way that the awk command line is structured, it is necessary to include . . . a -f command line switch on the hashbang line. This enables . . . to run the awk interpreter with the appropriate command line for the script. The hashbang line should . . .
1K - last updated 2010-11-28 19:04 UTC by markhobley

HomePage
This wiki is maintained by regulars from the **#awk** channel on **[[https://libera.chat/|irc.libera.chat]]** . . . match * [[Shellquote]] strings for use in shell commands * [[Transpose]] a file * [[SimpleCalc]] simple . . .
5K - last updated 2023-06-26 04:15 UTC by HappMacDonald

HomePageJapanese
Here is the Japanese page for [[HomePage]]. 英語のページは[[HomePage|こちら]]です。この wiki は **[[http://www.freenode.net|irc.freenode.net]]** . . . "awk: pattern scanning and processing language - Commands & Utilities Reference" (「awk: パターンスキャン処理言語 . . .
5K - last updated 2008-10-19 07:34 UTC by hi saito

include
The [[awk]] extraction and reporting language does not support the use of include files. However, it . . . the name of more than one source file at the command line. === _Using multiple source files_ In . . . the name of more than one source file at the command line by using multiple !-f switches: {{{ awk . . . visible from other scripts called from the same command line: {{{ # one.awk BEGIN { sayhello() } # . . . more than one source file is provided at the command line, function names must be unique across . . .
2K - last updated 2013-03-30 10:38 UTC by markhobley

Inicio
Este wiki es mantenido por los usuarios del cenal **#awk** en **[[http://www.freenode.net|irc.freenode.net]]**. . . . "awk: pattern scanning and processing language - Commands & Utilities Reference", The Single UNIX . . .
7K - last updated 2009-02-12 23:31 UTC by fcr

input
The [[awk]] utility can take its input from [[standard input]] or from [[file]]s. If no input files are . . . specified at the command line, then [[awk]] will take its input from . . . Obtaining input using getline == The [[getline]] command enables [[awk]] to take input from a particular . . . without the need to specify the filename as a command line parameter. == Special variables related . . .
2K - last updated 2011-05-19 22:40 UTC by markhobley

Invoking an awk program
=== Throwaway one-liners It is often useful to type a simple program at the command line for use within . . . be supplied as an [[argument]] of the [[awk]] command: {{{ sh awk 'BEGIN {print "Hello World!"}' . . . script An [[awk]] script can be started at the command line, by passing the script name as a parameter . . . However, because of the syntax of the [[awk]] command line, it is necessary to include a the -f switch . . .
1K - last updated 2008-12-31 11:34 UTC by pgas

LinksPage
<toc> ---- == websites dedicated to awk == * [[http://awk.info/|awk.info]] news and articles about . . . "awk: pattern scanning and processing language - Commands & Utilities Reference", The Single UNIX . . .
4K - last updated 2015-02-24 14:45 UTC by pgas

MicrosoftWindowsInstallation
== Installation of an awk interpreter in Microsoft Windows The awk installer file is mawk-1.3.3-1-bin.zip . . . file to C:\WINDOWS\TEMP\ As Administrator, from command prompt: C: CD \WINDOWS\TEMP\TEMP REN MAWK-1.3.3-1-BIN . . .
1K - last updated 2009-07-10 18:46 UTC by MarkHobley

operator
The [[awk]] programming language provides a series of *operators* that allow [[value]]s and [[variable]]s . . . == numeric operators * [[numeric operator]] == comma operator * [[comma]] == redirection operators . . .
3K - last updated 2011-05-24 22:19 UTC by markhobley

output
== output == === standard output === === output to files === The [[awk]] programming language uses a . . . the output file remains open until a [[close]] command is encountered, or the program ends. . . .
1K - last updated 2010-11-16 00:44 UTC by markhobley

pattern
In [[awk]], patterns are used to select lines of input for processing. The pattern within each [[rule]] . . . of two [[regular expression]]s separated by a [[comma]] symbol to mark start and ending points for . . .
2K - last updated 2011-05-19 18:18 UTC by markhobley

print
== Usage == === print [ LIST ] === The [[variadic]] **print** function is used to produce simple standardized . . . [[output]]. A [[comma]] separated [[list]] of items for output is provided . . . output the current record: {{{ # These two commands are equivalent print $0 print }}} == Default . . .
1K - last updated 2011-05-11 15:10 UTC by markhobley

PrintASingleQuote
This question gets asked often enough that it deserves its own answer. This common question doesn't actually . . . when one attempts something similar on the command line: {{{ awk 'BEGIN{print "it said 'Hello, . . . it tries to parse "Hello, World!" as a string of commands to be inserted between two singlequoted strings. . . .
5K - last updated 2015-07-05 09:45 UTC by pitman

PureEvil
Not related to awk, just for fun. Some deliberately obfuscated and evil commands: {{{ sh # squeeze the . . .
1K - last updated 2011-09-08 14:00 UTC by pgas

RangeOfFields
Printing a range of fields - all fields but the first, for examples, or fields 3 through 8 - is a surprisingly . . . With GNU awk, you have to use the --re-interval command line switch (or --posix to get full POSIX compatibility, . . . purpose immediately clear to anyone reading the command line. ==== With gawk-devel's optional fourth . . .
10K - last updated 2015-09-08 09:52 UTC by pgas

redirection
The awk scripting language provides support for redirection via the greaterthan, doublebeak and pipe . . . to pipeline redirection to an external cat command: {{{ awk print "TST60000 An error has occured!" . . .
2K - last updated 2011-06-25 05:12 UTC by pgas

return
The [[builtin]] '''return''' [[command]], can be used to exit from a [[function]] within the [[awk]] . . . control to the [[calling section]]. The return [[command]] takes the form of: return foo Where foo is . . . [[calling section]]. === Using the return value command to set an errorlevel === By convention, when . . . to set an [[errorlevel]] using the return command, which can be utilized by the [[calling section]]: . . . block is reached and no explicit return [[command]] has been given, then the [[function]] will . . .
2K - last updated 2011-05-03 17:29 UTC by markhobley

RS
= Record Separator = The [[special variable]] RS is a record separator that is used to determine how . . . record separator can be changed by assignment or command line switch == The record separator can be . . . to an exclamation mark RS = "!" } }}} The -v command line switch enables the default record separator . . . needs to be considered when passing command line parameters this way. == Changing the record . . .
3K - last updated 2013-02-19 23:11 UTC by markhobley

SedFAQ
<toc> ---- == I have a line like "abdcgfjeuPATTERNfjfhghj", I want to get the PATTERN part, why . . . ahead with the replacement. Try running the same command with the /g switch and you'll see all the places . . . some /p switches at the end of the right "s" commands).** * PATTERN appears only once Let's start . . . to delete content s/_[^_]*_//g }}} The last "s" command can of course replace with some character instead . . . Nth occurrence to the end? This is easy. The "s" command accepts an optional number to specify which . . .
34K - last updated 2010-02-14 17:56 UTC by waldner

Shellquote
This function ensures that strings you use as arguments to the **system()** function (or **"cmd"{{{|}}}getline** . . . commands) are safely quoted. First, all single quotes . . .
1K - last updated 2009-03-01 00:35 UTC by h-67-101-152-180.nycmny83.dynamic.covad.net

special variable
Some [[variable]] names have a special meaning to the awk interpreter. == List of special variables == . . . [[ARGC]] | An informative variable that provides command line parameter information | [[ARGV]] | An . . . informative [[array]] that provides command line parameter information | [[CONVFMT]] | . . .
2K - last updated 2011-06-25 05:46 UTC by pgas

Transpose
To transpose a N rows x M columns file into a M rows x N column file, one approach is to read the whole . . . rows and columns (the example assumes comma separated fields; adapt to your real data): {{{ . . .
1K - last updated 2011-03-20 06:53 UTC by ppp089210038204.dsl.hol.gr

whitespace
== _Line breaks are best placed at whitespace points_ The [[awk]] extraction and reporting language is . . . character can be inserted at the end of a [[command]] or following squiggly [[braces]], where whitespace . . .
1K - last updated 2011-03-20 22:07 UTC by markhobley

y0tta
**y0tta:**     http://awk.freeshell.org/y0tta     revised: 2014-05-30 . . . TSO   sh   ksh   command.com   cmd.exe   ash\\ os: . . .
3K - last updated 2014-05-30 05:06 UTC by g0ph3r

49 pages found.