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Re: Easy to add with push but not to the end of a list
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From: |
Michael Heerdegen |
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Subject: |
Re: Easy to add with push but not to the end of a list |
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Date: |
Thu, 01 Dec 2022 16:11:07 +0100 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) |
Emanuel Berg <incal@dataswamp.org> writes:
> (defmacro push-last (elem lst)
> "Push ELEM to be the last element of LST.
> Beware that this is O(n) while `push' is O(1)."
> (if (and (symbolp lst)
> (not (symbol-value lst)) )
> (list 'setq lst `(list ,elem))
> (list 'nconc lst `(list ,elem)) ))
Do you really want to test the `symbol-value' at compile (macro
expansion) time?
Michael.
- Re: Easy to add with push but not to the end of a list, Emanuel Berg, 2022/12/01
- Re: Easy to add with push but not to the end of a list, Emanuel Berg, 2022/12/01
- Re: Easy to add with push but not to the end of a list,
Michael Heerdegen <=
- Re: Easy to add with push but not to the end of a list, Emanuel Berg, 2022/12/03
- Re: Easy to add with push but not to the end of a list, Michael Heerdegen, 2022/12/03
- Re: Easy to add with push but not to the end of a list, Emanuel Berg, 2022/12/05
- Re: Easy to add with push but not to the end of a list, Michael Heerdegen, 2022/12/05
- Re: Easy to add with push but not to the end of a list, Emanuel Berg, 2022/12/05
- Re: Easy to add with push but not to the end of a list, Michael Heerdegen, 2022/12/05
- Re: Easy to add with push but not to the end of a list, Emanuel Berg, 2022/12/06
- Re: Easy to add with push but not to the end of a list, Michael Heerdegen, 2022/12/06
- Re: Easy to add with push but not to the end of a list, Emanuel Berg, 2022/12/06
- Re: Easy to add with push but not to the end of a list, Michael Heerdegen, 2022/12/08