When comparing Mozilla Developer Network vs Hackr.io, the Slant community recommends Hackr.io for most people. In the question“What are the best resources to learn JavaScript?” Hackr.io is ranked 11th while Mozilla Developer Network is ranked 14th. The most important reason people chose Hackr.io is:
Instead of getting a recommendation from a single dev, you get recommendation from the entire programming community.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Free & open source
Pro Step by step learning on the ins and outs of JavaScript
Pro Close to first-hand information
The best information sources are the W3C, JavaScript, Golang etc. specs, but they are too hard to read. All these videos (Lynda, Udemy, mail.ru, etc.) and articles may and do contain outdated and sometimes incorrect information.
Pro Community trust
Instead of getting a recommendation from a single dev, you get recommendation from the entire programming community.
Pro Recommendation for every programming language/framework/library
You can find Python as well as Jenkins.
Pro Nice filters
Free, Video, Book, Beginner, Advanced, etc.