AWK Cheatsheet
==============

Overview of unique features
---------------------------

* Text processing language
* Uses pattern-action paradigm
* Built-in variables for manipulating text
* Supports regular expressions
* Can be used for data extraction and reporting

Text processing
---------------

    # Print a specific field from a file
    awk '{print $1}' file.txt
    
    # Search for a specific pattern in a file
    awk '/pattern/ {print}' file.txt
    
    # Use built-in variables to manipulate text
    awk '{print toupper($0)}' file.txt
    awk '{print length($1)}' file.txt

Regular expressions
-------------------

    # Search for a regular expression in a file
    awk '/[0-9]+/ {print}' file.txt
    
    # Use regular expression to match a specific pattern
    awk '/^start/,/^end/ {print}' file.txt

Reporting and data extraction
-----------------------------

    # Calculate the sum of a column in a CSV file
    awk -F, '{ sum += $3 } END { print sum }' file.csv
    
    # Extract data from a log file
    awk '/error/ {print $0}' log.txt

Resources
---------

* AWK documentation
  <https://www.gnu.org/software/gawk/manual/gawk.html>
* AWK tutorial
  <https://www.tutorialspoint.com/awk/index.htm>
* AWK forum for community support and troubleshooting
  <https://stackoverflow.com/questions/tagged/awk>

From: <gopher://sdf.org/0/users/s.kaplan/cheatsheets/
programming-languages/awk.md>