plur: Plurality monad: Zero, one, or at least two.
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Often when counting you don't need an exact count, but only whether there are two things. Two examples:
When searching for inhabitants of a type (implementations of a program), you want to be able to tell whether there are (a) no possible inhabitants, (b) a unique inhabitant, or (c) multiple inhabitants.
When displaying the name of a variable, if there's exactly one variable of a given name ("a") you can just use that name, but if there are multiples you might use a unique id to disambiguate them ("a1" vs "a2").
Properties
| Versions | 0.1.0.0, 0.2.0.0, 0.2.0.0 |
|---|---|
| Change log | ChangeLog.md |
| Dependencies | base (>=4.3 && <4.14), semigroups (>=0.18) [details] |
| License | BSD-3-Clause |
| Copyright | (c) 2018-2019 Joel Burget |
| Author | Joel Burget |
| Maintainer | joelburget@gmail.com |
| Category | Data |
| Uploaded | by joelb at 2019-02-12T20:20:54Z |
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