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Monad Identity Monoid
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| // Here's our unit function | |
| const id = x => Identity(x); | |
| // Left & Right Identity... | |
| const identity1 = op(f, id); | |
| const identity2 = op(id, f); | |
| // ...are the same! | |
| inspect(identity1('i')); // Identity(i1) | |
| inspect(identity2('i')); // Identity(i1) | |
| /** | |
| * We can say that: | |
| * | |
| * op(f,id) EQUALS op(id, f) | |
| */ |
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