When comparing Ray Wenderlich vs exercism.org, the Slant community recommends exercism.org for most people. In the question“What are the best online resources to learn swift development?” exercism.org is ranked 1st while Ray Wenderlich is ranked 5th. 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 Large variety of tutorials available
The tutorials available for iOS range from iOS design patterns to animations. Tutorials are available for all experience levels.
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 Monthly subscription
Most of the courses aren't free, and can only be accessed by paying the $19/month subscription fee.
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.