Idiosyncratic Ruby

Quick Lists and Cheat Sheets

• String#unpack and Array#pack
• List of Special Global Variables
• Commented Standard Library
• Method Metaprogramming
• Commented Exception List
• RbConfig
• sprintf
• strftime

Idiosyncratic Syntax

• Different Ways of Creating Local Variables
• 210 Different Ways to Create Strings
• Syntactical and Grammar Edge Cases
• Multiple Syntactical Meanings of Characters
• Valid (Pre|In|Suf)fixes for Number Literals
• Rules for Symbol Construction
• Escape Sequences in Double-Quoted Strings
• Pattern Assignment
• 43 Ways to Embed Null

Idiosyncratic Regexes

• Advanced Regex Features
• Meta Chars and POSIX Character Classes
• Unicode Character Properties
• Back References
• How to Use Regexes

Idiosyncratic Constants

• Constant Re-Assignment
• Private & Deprecated Constants
• Tree of Ruby's Core Constants
• Uppercase Letters Allowed to Start a Constant

Idiosyncratic Special Objects

• SCRIPT_LINES__
• ENV
• TOPLEVEL_BINDING
• DATA
• Warning (part 1)
• Warning (part 2)
• Underscore-wrapped Keywords and Methods

Idiosyncratic Methods

• Enumerable#slice_*
• Hash#compare_by_identity
• .try_convert
• .equal?, eql?, ==, ===
• instance_eval, class_eval

Idiosyncratic Standard Library

• un.rb
• URI.regexp
• IRB::MagicFile
• Gem
• ERB.new

Idiosyncratic Command-Line Options

• $ ruby -s
• $ irb --inspect
• $ ruby -n
• $ ruby -X
• $ ruby --disable-a

Obscure Ruby and Code Golf

• Why You Should Play Code Golf
• Transcendental Ruby Imbroglio Contest of 2013
• Transcendental Ruby Imbroglio Contest of 2015
• SHA256 Golf
• Transcendental Ruby Imbroglio Contest of 2018

Ruby Idiosyncrasies

• Things to Know About Strings
• $VERBOSE and $DEBUG
• module_function vs. extend self
• Messing with Interpreter Internals
• Special _ Symbols
• Unary Operators
• Reflecting on Native Methods
• Identifiers to Avoid
• ASCII-8BIT vs. US-ASCII
• Magic Comments

Opinion

• Reasons for Ruby
• Static Typing
• Ruby Features to Remove

Miscellaneous

• No Tool Highlights Ruby Syntax Correctly
• Structs and Struct Alternatives
• Ruby's Successors
• The SUPPORT_JOKE Compiler Option
• Ruby's Initial State
• Parsing Command-Line Options
• Ruby is Excellent for Working with Unicode Data
• The Result of 0i == 0.0
• Ruby / Unicode Version

Browse Chronologically

• Atom / Direct Feed
• idiosyncratic-ruby.com / GitHub
• @idiosyncratic@ruby.social / Mastodon