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Re: creating a function that works for active region or whole buffer
From: |
Stefan Monnier |
Subject: |
Re: creating a function that works for active region or whole buffer |
Date: |
Fri, 01 Feb 2013 08:55:25 -0500 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) |
>> goto-line and line-number-at-pos are expensive operations that count
>> (and re-count and re-re-count every time) the number of LF chars from
>> the beginning of the buffer.
> I'm using them only at the beginning of the function, and therefore
> once per function call, that does not sound very expensive to me.
> What do you suggest instead?
Use buffer positions. I.e. (point) and (goto-char POS).
After (goto-char POS) you may call (beginning-of-line) or (end-of-line)
if you want to make sure you're at a line boundary.
Stefan