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| From: | Emanuel Berg |
| Subject: | Re: [External] : Re: How to make M-x TAB not work on (interactive) declaration? |
| Date: | Mon, 16 Jan 2023 00:10:04 +0100 |
| User-agent: | Gnus/5.13 (Gnus v5.13) |
Drew Adams wrote: >> I do understand that there is some LISP mystery why is >> it so. > > This has nothing per se to do with Lisp. And there's really > no mystery. It's the identity element: https://en.wikipedia.org/wiki/Identity_element It makes sense in math and also in Lisp at least when we are implementing a math operator. This way it will make sense when we say "sum these elements and add that sum to some other sum". If "these elements" sometimes are no elements at all, adding 0 to the larger sum is what you want to do. -- underground experts united https://dataswamp.org/~incal
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