Result is a Functor now #5
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Add Fantasy Land-compliant
map()methods forOkandErr, for functional programming happiness.I had to patch the test helper functions to account for instance methods. I could have sworn Chai was smart enough to ignore stuff on prototypes, but, 馃し鈥嶁檪.
The other, possibly more semantic option is to assert that
deep.equal(new Ok(expectedValue))anddeep.equal(new Err(expectedErrorMsg)). Your call.