https://www.nayuki.io/ https://www.nayuki.io/ seems good usually. But yes, i would mainly recommend the standard lib of the language in question, but not all p

https://www.nayuki.io/ https://www.nayuki.io/ seems good usually. But yes, i would mainly recommend the standard lib of the language in question, but not all programming languages have a "standard lib" you can read.