Ruby Cheatsheet

Posted : admin On 1/1/2022

Ruby is an easy language to learn, but it's often necessary to look up something we've forgotten. A combination of Google plus any Ruby books we have on our shelves can help, but sometimes it's handy to refer to a simpler set of notes - such as a 'cheat sheet.' This post attempts to cover the most interesting ones.

Ruby Cheatsheet

The idea for this initial list came from Scott Klarr's own list. Scott has been quite prolific lately in putting together lists of cheat sheets. Some of his lists are: Apache cheat sheets, MySQL cheat sheets, PHP cheat sheets, and JavaScript / AJAX cheat sheets.

On with the Ruby cheat sheets:

We have cheat sheet for HTML, CSS, Javascript, jQuery, Ruby, Font Awesome and Material Design Icons. All the nut-bolts and lessons related to these languages are found here. It can also be considered as a quick reference card which can guide you to your goal of software development. You can also edit and try the source code to see for yourself. Pry Cheat Sheet. Youtube Tutorial 2013; Command Line. Pry -r./config/appinitfile.rb - load your app into a pry session (look at the file loaded by pry -r./config/environment.rb - load your rails into a pry session; Debugger. Help ls- Display command options for pry command ls.

Ruby Methods Cheat Sheet

0 Comments for this cheatsheet. / Over 352 curated cheatsheets, by developers for developers. Devhints home Other Ruby libraries cheatsheets. Factory Bot cheatsheet Meta-tags gem cheatsheet Ronn cheatsheet Slim cheatsheet Chunky PNG. Regex cheatsheet. Many programs use regular expression to find & replace text. However, they tend to come with their own different flavor. You can probably expect most modern software and programming languages to be using some variation of the Perl flavor, 'PCRE'; however command-line tools (grep, less.) will often use the POSIX flavor (sometimes with an extended variant, e.g. Regular Expressions Cheat Sheet for Python, PHP, Perl, JavaScript and Ruby developers. The list of the most important metacharacters you'll ever need.

'Essential Ruby' RefCard (PDF)

Essential Ruby is a combination of a cheat sheet and a tutorial. It's six pages long, but features a mini Ruby introduction and tutorial, as well as the myriad of tables you'd expect from a cheat sheet. It's like a whole Ruby beginner's reference and tutorial in a single PDF. The only 'catch' is that you need to be a user of DZone (the 'Digg for Developers') or JavaLobby to get it, but there's a very simple signup form you can fill in if you're not.

Ruby Cheatsheet (PDF and PNG)

This cheat sheet (homepage) covers types, exceptions, expressions, variable types, operators and precedence, constants, regular expressions, predefined / special variables, arguments accepted by the Ruby interpreter, reserved words, and a large collection of Object, String, Kernel, Array, Hash, Test::Unit, File, Dir and DateTime methods. Extremely suitable for printing and/or wall chart use.

Ruby QuickRef (HTML)

I often use this one myself! A ridiculously comprehensive 'cheat sheet' created by Ryan Davis covering syntax rules, reserved words, regular expression terminology, class and method definitions, predefined variables and constants, control and logic expressions and formations, exceptions, the standard library, and a whole ton of useful stuff.


Ruby Reference (PDF)

More of an extremely brief reference than a truly comprehensive cheat sheet, but still useful, especially for beginners. 5 pages long, so not suitable for printing (Also available to view on the Web at Scribd.)

Cheat: Ruby Cheat Sheets on your Terminal! (Application)


Not a cheat sheet, but an application (gem install cheat) that provides cheat sheet type reference material on your terminal (from 228 source cheat sheets!) Developed by the great guys over at Err Free.

A Beginner's Notes (HTML)

A set of notes made by a beginning Ruby developer as he works his way through a Ruby manual.

Ruby Command Line Parameters Cheat Sheet (HTML)

A simplified list of the command line options offered by the Ruby interpreter.

Strftime Parameters (HTML)

Ruby Cheatsheet Pdf

A handy guide to the formatting parameters accepted by strftime. I commonly have to look these up myself!