When comparing exercism.org vs Udemy, the Slant community recommends exercism.org for most people. In the question“What are the best websites to learn to code?” exercism.org is ranked 2nd while Udemy is ranked 8th. 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
Ranked in these QuestionsQuestion Ranking
Pros
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.
Pro Wide range of courses
If one course doesn't meet your needs, there is a sea of other courses to choose from.
Pro Value for money
A +10 hour high quality course for under $20 is great value.
Pro Regular discounts
Often run discounts 50 - 90% off resulting in sub $20 courses.
Pro Offers intermediate and advanced courses
Udemy offers plenty of courses for beginner programmers, but also has a large variety of more advanced courses to choose from.
Pro Some courses are free
Pro Courses available in over 80 languages
Pro Friendly community
Both on site and on various social networks Udemy aims to create a community of friendly people that can help each other out.
Pro Quality of top courses
The quality of top courses (+4.0 rating & high enrollment) is exceptional.
Cons
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.
Con Quality varies
The quality control for the content offered is fairly limited. As there are so many different instructors offering courses on Udemy, many of which lack formal training and teaching experience since anyone can be a teacher on Udemy, the quality varies quite a bit between the different courses.
Con Most courses are expensive
While Udemy does offer free courses, most of them are around $100.
Con Difficult to take multiple (10+) courses at the same time
The system becomes messy and hard to follow if you plan on using the site to learn more than a handful of things at once.