When I don’t know what’s the function’s meaning, is there any keyboard shotcuts to get the function document?
Autocomplete and Intellisense-type feature discussion, for any language, is covered in this topic:
Look at the autocomplete-plus package for the current state-of-the-art for Atom along these lines.
Closing this topic as duplicate.
It was suggested that perhaps in my illness-and-medication-induced haze that I might have been premature in closing this topic. Reopening.