"Ruby Core and Standard Library" was retired on June 1, 2025.
- Ruby Courses
- Beginner
About this Course
In the Ruby Collections course at Treehouse, you'll level up your Ruby knowledge and start learning about collections. We use two basic data structures to create collections in Ruby: arrays and hashes. These are both examples of "collections" and you’ll work with them a lot in your career as a Ruby programmer. During the course, we'll be writing simple programs that build on what we learned in this course and in previous courses.
What you'll learn
- Ruby Arrays
- Ruby Hashes
- Ruby Collections
Teacher
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Jason Seifer
Jason helped launch Treehouse and spent 4 years teaching here before returning to Rails development full time.