Re: Using CL in Gnus

[sigurd@12move.de (Karl Pflästerer)]

On 26 Nov 2003, Reiner Steib <- 4.uce.03.r.s@nurfuerspam.de wrote:

> Do I understand the docs correctly, that mapc and mapcar _only_ differ
> in the result they give, but not in the side effects?  Did anyone

No they differ  more.  `mapc' can take an arbitrary number of sequences
as arguments `mapcar' only one.  Furthermore IMO if you read `mapc' you
know a function is used only for the side effects it has; on the other
hand `mapcar' shouldn't be used for side effects IMO.

> check if we could use mapcar instead of mapc in gnus.el and
> gnus-agent?  IMHO we should replace them, if there's no disadvantage.

Better check for the Emacs version and provide a macro.  People have to
read code and the meaning of mapc is different from the one of mapcar.


[...]
> To make clear that the code in Gnus 5.10 _should_ not use mapc (beside

I don't understand your point here. 


   KP

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