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AA-awk-history
http://awk.freeshell.org/AA-awk-history\\ a concise history of awk and some of its forks\\ {{{ common . . .     variables: ARGC ARGV FNR RSTART RLENGTH SUBSEP\\       . . .
2K - last updated 2013-10-26 02:28 UTC by g0ph3r

AllAboutGetline
//Editor's notes: The article was originally posted on the comp.lang.awk newsgroup, and can still be . . . Set| |getline|$0, ${1...NF}, NF, FNR, NR, FILENAME| |getline var|var, FNR, NR, FILENAME| . . . rule to handle input file transitions: {{{ awk FNR==1 { ... start of file actions ... } }}} File transitions . . . can occur at getlines, so FNR==1 needs to also be checked after each unredirected . . . file2 c d }}} you'd normally do: {{{ sh $ awk 'FNR==1{print}' file1 file2 a c }}} but if a "getline" . . .
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) . . . cos rand srand match sub gsub\\ vars: ARC ARGV FNR RSTART RLENGTH SUBSEP\\ keywords: do delete function . . .
2K - last updated 2012-03-18 23:21 UTC by g0pher

AwkFeatureComparison
This page lists which awk implementations support which features. Additions and corrections are very . . . in POSIX mode|no|no|no|no|unknown|no|no|no| |=FNR|yes|yes|yes|yes|yes|yes|unknown|yes|yes|no| |=ARGV . . . "%s %s\n",a[1],a[2]}' # a z}}}| |=FNR|{{{echo a | awk '{print FNR}' # 1}}}| |=ARGV array|{{{awk . . .
4K - last updated 2015-04-27 13:23 UTC by pgas

AwkTips
<toc> ---- == Be idiomatic! In this paragraph, we give some hints on how to write more idiomatic . . . is often used in awk is as follows: {{{ awk 'NR==FNR {# some actions; next} # other condition {# other . . . until the program terminates. Another variable, FNR, stores the number of records read //from the current . . . file being processed//. The value of FNR starts from 1, increases until the end of the current . . . file is read, and so on. So, the condition "NR==FNR" is only true while awk is reading the first file. . . .
31K - last updated 2009-03-24 16:54 UTC by waldner

BEGIN
== Begin Blocks The [[awk]] programming language allows us to use **begin blocks** and **end blocks** . . . because the END rule may need to check the FNR and NR variables. Older versions of awk may read . . .
3K - last updated 2013-04-11 14:25 UTC by 92.40.253.171.threembb.co.uk

ComparingTwoFiles
Sometimes it is useful to compare two files. To do this in awk, the trick is to load the data from the . . . done in a compact manner like this: {{{ sh awk 'FNR==NR {arr[$0];next} $1 in arr' file1 file2 }}} Some . . . explanations: * //FNR == NR//: This test is true when the number of records . . . will be equal to the number of lines of file1 + FNR. * //arr[$0]//: This is a classic technique to . . .
2K - last updated 2011-08-25 00:35 UTC by steve

FileAndBitJoinClone
== Problem Description This was difficult to hash out. Eventually the task was described as, "for each . . . awk idiom to process two files: {{{ awk 'NR==FNR{BL[$1]=$0;next}$3 in BL{print BL[$3]}' bit.txt . . . tY8dxf0PLVX9NKT2lrjhYxTDy20lX+jvU06+UOKnnDGxZFnR4+eGxIupxjXV uJaEjCUxY6pvTfWtJTlCdbcVt1DfkOgVsZ2yPTckU+jwU06+Ek4rOvz85fXY . . .
7K - last updated 2009-03-08 16:26 UTC by waldner

FNR
The *FNR* informative [[special variable]] is used to track the number of [[record]]s that have so far . . . === Adding line numbers to a file === The FNR [[special variable]] can be wielded to give a simple . . . numbers to a file using [[awk]]: awk '{print FNR,$0 }' filename . . .
1K - last updated 2011-05-08 11:04 UTC by markhobley

getline
The *getline* command can obtain input from any number of files and does not require a command line parameter . . . | *Variables Set* | getline | $0, ${1...NF}, NF, FNR, NR, FILENAME | getline foobar | foobar, FNR, NR, . . .
1K - last updated 2011-05-02 20:14 UTC by markhobley

input
The [[awk]] utility can take its input from [[standard input]] or from [[file]]s. If no input files are . . . to input: | *Variable* | *Description* | [[FNR]] | An informative variable that provides the record . . .
2K - last updated 2011-05-19 22:40 UTC by markhobley

oawk
oawk is "old awk", it is the default /usr/bin/awk on Solaris and should not be used. You can also find . . . 1 awk: illegal statement near line 1 }}} ==== No FNR variable: {{{sh $ cat file1 a $ cat file2 b $ /usr/xpg4/bin/awk . . . 'NR==FNR{print}' file1 file2 a $ /usr/bin/awk 'NR==FNR{print}' . . .
5K - last updated 2012-01-24 08:29 UTC by pgas

PassingAnArray
* You can use split to create an array from a string: {{{ sh awk -v list='foo,bar,baz' ' BEGIN { n=split(list, . . . {{{ sh awk ' # cmp as awk program NR == FNR { array[NR] = $0; next } !(FNR in array && . . . $0 == array[FNR]) { result = 1; exit } END { exit (NR != 2 * FNR . . . could use {{{ARGIND == 1}}} instead of {{{NR == FNR}}}, which is working also for an empty file {{{file1}}}. . . .
1K - last updated 2009-04-13 22:51 UTC by goedel

special variable
Some [[variable]] names have a special meaning to the awk interpreter. == List of special variables == . . . that provides the current input [[filename]] | [[FNR]] | An informative variable that provides the number . . .
2K - last updated 2011-06-25 05:46 UTC by pgas

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