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Re: Working Around for cl-count


From: Dmitry Gutov
Subject: Re: Working Around for cl-count
Date: Sat, 01 Dec 2012 07:21:20 +0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (windows-nt)

"WJ" <address@hidden> writes:

> Dmitry Gutov wrote:
>
>> "Drew Adams" <address@hidden> writes:
>> 
>> >> >> >> Versions of Emacs less than version 24.2 complain about 
>> >> >> >> the lack of `cl-count`.
>> >> >> >
>> >> >> > In older versions, `cl-count' is called `count'.
>> >> >> > Use something like this:
>> >> >> > (if (fboundp 'cl-count) #'cl-count #'count)
>> >> >> 
>> >> >> Or use the `cl-lib' package that's on GNU ELPA.
>> >> >
>> >> > You can't do that if your code that calls `cl-count' is 
>> >> > used by others.
>> >> >
>> >> > What are you going to do?  Tell users of your code who have 
>> >> > Emacs < 24.2 that they must download `cl-lib' from GNU ELPA
>> >> > and put it in their `load-path'?  Or download it yourself
>> >> > and bundle that package with your code?
>> >> 
>> >> You publish your code as package to one of the ELPA 
>> >> repositories and add "cl-lib" as one of the dependencies.
>> > 
>> > So instead of fixing this at the source-code level, with just a few chars 
>> > of
>> > Lisp, you try to solve the problem at the distribution level: "Just use GNU
>> > ELPA".
>> > 
>> > Have hammer, will see nails...
>> 
>> You can use whatever workaround you want, but obviously the shim cl-lib
>> published at GNU ELPA is targeted at packages already present in or
>> indented for ELPA.
>
> : (version)
> "GNU Emacs 23.4.1 (i386-mingw-nt5.1.2600)
>  of 2012-02-04 on MARVIN"
> : (require 'cl)
> : (count 2 (number-sequence 1 22) :key (apply-partially 'gcd 4))
> 6

Yes, it works. Using unprefixed cl functions is all sorts of deprecated,
though, hence the recommendation.



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