So I'm playing "Purescript by Example" again and with the ch7 applicative validation code in particular. Was going through updating the code in the supplied modules since the language has since evolved ( ++ operator deprecated, qualified imports are more concise..) but just when I thought the modules would be in ship shape, I got an error from the compiler stating that I have an unknown typeclass called "Show" in the code. I'm not sure how this arises since Show is supposed to be included in purescript-prelude package...
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Are you explicitly importing Prelude too? Unlike in Haskell, it is not implicitly imported in PureScript - it's just a module like any other.
gb.
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