On Tuesday, 15 March 2022 at 15:51:46 UTC Jan Mercl wrote:
> a struct with a single field is another interesting case that can be
> abstracted out.
Aside: a struct with *no* fields is also more useful than you might think -
e.g. to use a map as a sparse set.
m := make(map[int]struct{})
m[123] = struct{}{}
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