I like to use Google to quickly locate API documentation. To get better results, I type some keywords that give desired results as top lines. For example:
JavaScript: MDC Array slice MDC String indexOf Ruby ruby doc Dir glob rubyonrails ActionMailer
What are your favourite tricks to pick the desired pages quickly?
P.S.
Google prefixes like site: are good, but I see two limitations:
1) It can be too long to type. Compare
MDC array slice
vs.
site:developer.mozilla.org array slice
2) If typing a search query in the address bar, I can't start with "site:"