Regional undo/redo is a close second.
The single most useful Emacs feature
11–20 of 112 posts
Re: The single most useful Emacs feature
#12 ; Ask for y/n on all queries that normally ask for yes/no.
(fset 'yes-or-no-p 'y-or-n-p)Re: The single most useful Emacs feature
#13That's probably the killer feature for me.
Re: The single most useful Emacs feature
#14Re: The single most useful Emacs feature
#15hi-lock-mode! Hi-lock lets you specify regexes to highlight anywhere in a file; it's like domain-specific font-lock. It's astoundingly useful in code review. For instance, given a giant blob of J2EE web handler code, I can eyeball one handler, recognize the annotation mapping the method to URL syntax, and then punch in a hi-lock regex to light up similar annotations everywhere in the file, then glance through the who…
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syn region LowVis start="\s*log_" end=";" contains=LowVis onelineRe: The single most useful Emacs feature
#16Transpose the current line with the previous line.
Re: The single most useful Emacs feature
#17The downside is that if the symbol locations change in a file, you'd have to refresh it. :(
Re: The single most useful Emacs feature
#18http://stackoverflow.com/questions/1218390/what-is-your-most...
Re: The single most useful Emacs feature
#19Trite but true!
Re: The single most useful Emacs feature
#20on a side note, whenever i asked such open ended question on stackoverflow, it would quickly get closed by some other user claiming that "there is no right answer" and the question must be closed. But there are so many great open ended questions on there that score so high among users. i guess it's a matter of luck that some anal retentive person doesn't get to it first?