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Mapping Some to None #5

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G4143 opened this issue Sep 2, 2019 · 0 comments

G4143 commented Sep 2, 2019 •

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In your enclosed examples of mapping optional types, you don't have an example which maps a Some[value] to a None. How do you accomplish that?

Some["caterpillar!"].map(&:upcase) # => Some["CATERPILLAR!"]
None.map(&:upcase) # => None

How do I accomplish
Some["caterpillar!"].map(do something to produce a None) # => None

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