>Give one exemple of a QandA site that has a better system than stackoverflow at that scale(i insist on the latter).There is none,because nobody has done better.
Ok, its not at the same scale, because it has a narrower focus, but PerlMonks is better for Perl questions and encourages the sort of discussion that SO hates. (It probably does have as many Perl specific questions as SO though).
The styling is kind of outdated now, but the content is better. Unfortunately it is Perl specific, and I am mainly using Python these days. You would look up how to do something and come away with more knowledge of the language and reason why things are done, rather than getting just enough material to copy paste until your code works.
Ok, its not at the same scale, because it has a narrower focus, but PerlMonks is better for Perl questions and encourages the sort of discussion that SO hates. (It probably does have as many Perl specific questions as SO though).
The styling is kind of outdated now, but the content is better. Unfortunately it is Perl specific, and I am mainly using Python these days. You would look up how to do something and come away with more knowledge of the language and reason why things are done, rather than getting just enough material to copy paste until your code works.