Skip to Content
Mini Arrow Down Icon
Codecademy Logo
Search Icon
Codecademy Logo
Menu Icon
Menu →
Languages
Mini Chevron Down Icon
HTML & CSS
Python
JavaScript
Java
SQL
Bash/Shell
Ruby
C++
R
C#
PHP
Go
Swift
Kotlin
C
Subjects
Mini Chevron Down Icon
Web Development
Data Science
Computer Science
Cybersecurity
Developer Tools
Machine Learning
Code Foundations
Web Design
Game Development
Mobile Development
Data Visualization
Interview Prep
Math
Cloud Computing
DevOps
AI
Data Engineering
Data Analytics
IT
Open Source
For Business
Beta Catalog
All Cheatsheets
Ruby Cheatsheets
facebook
twitter
linkedin
Cheatsheets
Learn Ruby
Arrow Up Icon
Back to top