book-review 1 career 1 cheatsheet 2 command-line 2 corner case 1 curated-resources 2 debugging 1 ebook 4 ebook-generation 1 epub 1 examples 2 fixed-string 2 gnu-grep 1 gnu-sed 2 gui 1 intermediate 1 javascript 2 linux 2 lookarounds 1 markdown 1 maths 1 multiline 2 pandoc 1 pdf 1 perl 2 python 7 re-module 2 regex-module 1 regular-expressions 7 ripgrep 3 ruby 1 sd 1 shell scripting 1 substitution 2 tutorial 1 wxpython 1 xelatex 1