Tag

functions

3 posts

Text Processing

Write awk user functions: parameters and local variables, recursion, libraries, numeric precision, rounding and the string versus number pitfalls.

6 min read

Regular Expressions

Use PHP preg functions: preg_match, preg_match_all, preg_replace and callbacks, delimiters and flags, named groups, error checks and the u modifier.

6 min read

Shell Scripting

Structure a shell script with a main function, small helpers and a guarded entry point, so it can be sourced for tests and read from the top down.

6 min read