Re: `append' vs. `nconc'

[Pascal J. Bourguignon]

Emanuel Berg <embe8573@student.uu.se> writes:

> Teemu Likonen <tlikonen@iki.fi> writes:
>
>> Don't modify a list created with '(...). Use (list
>> ...) instead.
>
> What about the elements of the lists? If they are
> themselves lists, can they be created with ' or is
> this rule a "recursive descent" one?

You must remember the literal/immutable status of each item at each
level.

Since you are incapable of remembering it, you should assume that the
whole input data is immutable and write purely functional code (ie. use
append, not nconc) in general.


-- 
__Pascal Bourguignon__                 http://www.informatimago.com/
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