Cheat Sheets

• JavaScript
• JavaScript Web APIs (in progress…)
• Hotwire: Stimulus
• Hotwire: Turbo
• HTML
• HTML Entities
• CSS Basics
• CSS Flex & Grid
• Ruby: General (in progress…)
• Ruby: class String interactive
• Ruby: class Array interactive
• Ruby: class Hash interactive
• Ruby: class Integer interactive
• Ruby: class Float interactive
• Ruby: class Numeric interactive
• Ruby: class Object interactive
• Ruby: module Enumerable interactive
• Ruby: module Comparable interactive
• Ruby: module Kernel interactive
• Bash: Text formatting (in progress…)

Notes:
Printable stylesheets on one landscape A4/Letter page, in a 3 column layout: | – | – | – |.
Works in latest Chrome, Edge & Firefox. (Safari doesn't seem to print multiple CSS columns at this moment.)
Make sure to select landcape print mode if it doesn't automatically, like it is supposed to do in most browsers.

Some methhods/properties have a direct link to the MDN/HOTWIRE/Ruby documentation indecated by a small 'i'.

Tip:
Responsive columns: increase the width of your browser for more columns. (Only screen usage.)
| – |
| – | – |
| – | – | – |
| – | – | – | – |
| – | – | – | – | – |
| – | – | – | – | – | – |
You'll need a minumum of 3840px for that last one :-)