learn programming

challenges

• https://www.hackerrank.com/contests
• https://codefights.com/challenge/mMdsrajm7T9H87Noc/main
• https://www.codingame.com/
• http://exercism.io/languages
• http://rubyquiz.com/

mentoring

• https://www.codementor.io/tips/6543378221/a-slightly-slimmed-down-version-of-the-official-select2-ajax-example-on-how-to-have-an-ajax-powered-autocomplete-dropdown

Optimizations

• javascript
  • https://github.com/Kikobeats/js-mythbusters
• ruby
  • https://www.rubytapas.com/

Algorithms

• https://www.quora.com/What-are-the-most-learner-friendly-resources-for-learning-about-algorithms
• https://www.analyticsvidhya.com/learning-paths-data-science-business-analytics-business-intelligence-big-data/
• http://bigocheatsheet.com/
• bulgaria
  • http://cs.maycamp.com/?page_id=83
• линейна алгребра
  • http://immersivemath.com/ila/index.html
• курсове
  • http://videolectures.net/mit6046jf05_introduction_algorithms/

Функционално програмиране

• https://github.com/hristozov/fpkn1617

Academies

• https://www.codecademy.com/
• http://exercism.io/
• http://www.codingdojo.com/
• https://egghead.io/
• https://www.edx.org/course/introduction-functional-programming-delftx-fp101x-0

Online help

• https://www.codementor.io/experts

Conferences

• ruby
  • http://rubyc.eu/

quizes

• https://projecteuler.net/