Ruby - Bug #17317: In 2.7.2, Hash#except doesn't seem to exist, but is in the documentation

zverok (Victor Shepelev)
2020-11-11T14:17:26Z

Actually, situation with documentation sites is kind of weird now (to say the least).

"Official" docs.ruby-lang.org always renders correctly, but other than that is not very usable (because of mixing all the lang and standard library together)

ruby-doc.org really "seems" official due to the domain name and high position in Google search, but is frequently behind (when some code structure is changed, it is not always rendered correctly there), closed-source and maintained by a single person (though, fairly responsive on Twitter)

rubydoc.info is affilated with YARD and its author, semi-official for the rubygems documentation hosting (though not supported by rubycentral?..) and also renders Ruby core docs. Somehow

there is also https://apidock.com/, closed-source, semi-abandoned (?) but high in Google results

finally, the most modern one is https://rubyapi.org/, open-source, actively developed, supported by the community, but also unofficial...

The whole situation is kinda messy