When comparing Codecademy Ruby course vs Ruby Koans, the Slant community recommends Ruby Koans for most people. In the question“What are the best ways for a beginner to learn Ruby?” Ruby Koans is ranked 5th while Codecademy Ruby course is ranked 6th. The most important reason people chose Ruby Koans is:
Available online for free.
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Pros
Pro You'll come away knowing the Ruby language itself
This course teaches Ruby as a language, so you'll not be tied to a specific library or framework.
Pro Good for people completely new to programming
If you've never programmed before, you can come away from this with a better understanding of programming and the Ruby language.
Pro Free
Available online for free.
Cons
Con Doesn't teach computer science
Maybe this is a pro for some people, but there is really no computer science taught in this course aside from the basic structure of a programming language.
Con Teaches Ruby and nothing more
You'll come away from this course with a general knowledge on how to program in Ruby, but it won't really teach you how to create a real-world project or how such things work.