When comparing CoffeeScript Ristretto vs exercism.org, the Slant community recommends exercism.org for most people. In the question“What are the best resources to learn CoffeeScript?” exercism.org is ranked 1st while CoffeeScript Ristretto is ranked 4th. The most important reason people chose exercism.org is:
Rather than merely test for code correctness, Exercism uses peer review to improve general programming techniques. Users are encouraged to comment on others' solutions, and refine their own based on feedback.
Specs
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Pros
Pro Beginner-friendly
The first half of the book covers the basics concepts in-depth, before moving on to the more advanced CoffeeScript capabilities.
Pro A respected author
Reginald Braithwaite is well known and respected in the dev community.
Pro Human review and feedback
Rather than merely test for code correctness, Exercism uses peer review to improve general programming techniques. Users are encouraged to comment on others' solutions, and refine their own based on feedback.
Pro Practice with production tools
Unlike many code practice websites, Exercism requires the user to develop and test entirely offline, submitting only the finished code. This promotes familiarity with essential tools and workflow, not just the bare language.
Cons
Con Not a lot of practical examples
The balance between between academic and practical code examples leans heavily on the side of academic.
Con Custom commandline client
Exercism requires using a CLI utility to fetch and submit exercises. This is inconvenient compared to web-only alternatives, and poses an additional barrier to entry for some users.