I just looked at the folding.el mentioned in that other thread and it mentioned that imenu (included with Emacs) and hideshow might be good packages for function/block-level hiding. The former is interesting, and I didn't know about it, but it doesn't provide hiding capability. I just tried out the latter and it seems good so far at hiding blocks.

In reply to Re: (OT) Emacs code folding by kaif
in thread Subroutines versus straight top to bottom scripts by ghenry

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