JavaScript Quiz? [closed]

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Is this an equivalent 'JavaScript Quiz' site/book to things like :

o Ruby Quiz : http://rubyquiz.com/

o Python Challenge

o Perl Quiz of the Week

I want to improve 开发者_开发知识库my object oriented JavaScript skills (i.e. more than striped tables or annoying popups that JavaScript is infamous for). More like 'proper' NodeJS style development.

Thanks!

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I haven't come across any as comprehensive as the Python Challenge. Here's a set of questions I came up with though: https://stackoverflow.com/questions/1684917/what-questions-should-a-javascript-programmer-be-able-to-answer/1684945#1684945

This one is a bit more advanced: http://perfectionkills.com/javascript-quiz/

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You can take a quiz here: http://codefid.info/ This is very good site for learning and practicing not only JS but other front end technologies as well. I recommend this site a lot.