use stackexchange.com its a q&a site for developers.
But how are you managing to learn 3languages at once?
I already learned javascript and I am just learning some things that I didn't know before like some libs.
Java and C++ uses more or less sometimes the samecode and the same basics so it's not so hard to learn them...
I am currently learning 1 week java then 1 week c++. After 1 week it's nice to see what I remembered.