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46 lines
832 B
Markdown
46 lines
832 B
Markdown
The same kind of thing happens with `map`. Are we saying this is incorrect behaviour?
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```unison
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map : (a -> b) -> [a] -> [b]
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map f = cases
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x +: xs -> f x +: map f xs
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[] -> []
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```
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```ucm
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I found and typechecked these definitions in scratch.u. If you
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do an `add` or `update`, here's how your codebase would
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change:
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⍟ These new definitions are ok to `add`:
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map : (a ->{𝕖} b) ->{𝕖} [a] ->{𝕖} [b]
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Now evaluating any watch expressions (lines starting with
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`>`)... Ctrl+C cancels.
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```
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```ucm
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.> add
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⍟ I've added these definitions:
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map : (a ->{𝕖} b) ->{𝕖} [a] ->{𝕖} [b]
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.> view map
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map : (a -> b) -> [a] -> [b]
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map f = cases
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x +: xs ->
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use builtin.List +:
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f x +: map f xs
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[] -> []
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.> find map
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1. map : (a ->{𝕖} b) ->{𝕖} [a] ->{𝕖} [b]
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```
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