Wiki: AWK

• Tips for golfing in AWK
• GNU AWK manual

Tips

• Use END instead of BEGIN for holes without input
• The ~ and !~ operators check if a string matches a regex
• Set the IGNORECASE variable to enable case insensitive string comparisons
• Use the predefined variables
• Bitwise operators are available as functions: and(), or(), …
• Load the ordchr extension with @load"ordchr" to access the ord() and chr() functions