When comparing Dash vs SoloLearn, the Slant community recommends SoloLearn for most people. In the question“What are the best websites to learn to code?” SoloLearn is ranked 17th while Dash is ranked 18th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Real-time editor
The result of what you write shows next to your code in real-time.
Pro Slideshows
Slideshows explain concepts and show the final result of given task without taking you out of the moment.
Pro Completely free
Pro Offline learning mode for mobile apps
Allows learning while disconnected from the net.
Pro Easy for beginners
Anyone can get started with this.
Pro Share and modify others' projects
Pro Browser-based code playgrounds
No software installation needed, just a modern web browser. On mobile devices though the mobile apps are highly recommended.
Pro Excellent mobile apps available
Pro Gamification
XP, levels, badges, certificates, etc.
Cons
Con Requires you to sign up for information
The Dash website provides very little information and requires you to sign up with your e-mail if you want to learn more (such as cost).
Con Only the most commonly used languages are covered.
C++, Java, JavaScript, C#, Python, SQL, PHP, Swift, Ruby, JQuery, HTML, CSS. You won't find anything less common like Haskell, Erlang, Elixir, Common Lisp, Scheme, Clojure, Rust, etc.
Con Limited usefulness for intermediate or experienced programmers
No advanced coding challenges. Look for those on other sites like hackerrank.