有哪些类似于runoob的站点？

1. W3Schools
2. Codecademy
3. GeeksforGeeks
4. Hackerrank
5. Khan Academy
6. FreeCodeCamp
7. Tutorialspoint
8. Udemy
9. Coursera
10. edX
11. Team Treehouse
12. SoloLearn
13. Learn Python
14. CodeSchool
15. PluralSight
16. Lynda
17. Codepen
18. Scratch
19. Code.org
20. Dash by Plotly.