Gawk: Difference between revisions

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AWK is a scripting language that was originally designed for manipulating tables and  
A scripting language originally designed for manipulating tables, and simple cli tools.
presenting them in human-readable formats. It is useful on the commandline, I'd prefer
to use a more powerful language than awk than use it for scripting.


{{ WARNING |
= Tutorials =
There are two main variations of the unix coreutils (Gnu/BSD), each has different parameters etc.
<blockquote>
If you are expecting to use awk across different platforms, make no assumptions.
{| class="wikitable"
}}
|-
| official docs || https://www.gnu.org/software/gawk/manual/html_node/index.html#SEC_Contents
|-
| awk intro || http://www.funtoo.org/wiki/Awk_by_Example,_Part_1
|-
| awk intro || http://www.math.utah.edu/docs/info/gawk_7.html
|-
|}
</blockquote><!-- Tutorials -->


= Notes =
= Notes =
<blockquote>
<blockquote>
{| class="wikitable"
{|
|-
|-
| [[gawk usage]]
| [[gawk usage]]
|-
|}
</blockquote><!-- Notes -->
= Syntax =
<blockquote>
{|
|-
|-
| [[gawk variables]]
| [[gawk variables]]
Line 26: Line 39:
| [[gawk matching]]
| [[gawk matching]]
|-
|-
|}
| [[gawk subprocess]]
</blockquote><!-- Notes -->
 
= Syntax =
<blockquote>
== match ==
<blockquote>
match checks for a matching string, returns char number if found, otherwise returns a 0
 
<source lang="awk">
match($0, "searchterm")
</source>
 
<source lang="bash">
echo "abcdefg" | awk '{var=match($0, "cd"); print var}'
#> 3
 
echo "abcdefg" | awk '{var=match($0, "zef"); print var}'
#> 0
 
echo "abcdefg" | awk '{
  if(match($0, "cd")) {
      print "match found";
  }
}'
#> match found
</source>
</blockquote><!-- awk match -->
 
== system ==
<blockquote>
Executes a command in shell or cmd from an awk script.
Assigning to a variable only gives return value (1,0)
<source lang="awk">
system(ls -la);
</source>
</blockquote><!--awk system-->
 
== math ==
<blockquote>
<source lang="awk">
var+= 1;
var=( (100/2) * 3 );
</source>
</blockquote><!-- awk math -->
 
= References =
{|
|-
| http://www.funtoo.org/wiki/Awk_by_Example,_Part_1
|-
|-
| http://www.math.utah.edu/docs/info/gawk_7.html
|}
|}
 
</blockquote><!-- Syntax -->
</blockquote><!-- Scripting -->

Latest revision as of 17:34, 18 June 2022

A scripting language originally designed for manipulating tables, and simple cli tools.

Tutorials

official docs https://www.gnu.org/software/gawk/manual/html_node/index.html#SEC_Contents
awk intro http://www.funtoo.org/wiki/Awk_by_Example,_Part_1
awk intro http://www.math.utah.edu/docs/info/gawk_7.html

Notes

gawk usage

Syntax

gawk variables
gawk datatypes
gawk conditionals
gawk loops
gawk print
gawk matching
gawk subprocess
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