dusky flower
I'm going through the Exercism track and getting this error from this case clause. It seems to me since I'm specifying with [Wine(color: color, ..rest) that I'd be matching a list where the first element was a Wine with the given color. If I understand the error correctly, it's saying this match condition is identical to [_, ..rest]. Is that right?
Thanks in advance!
rare zinc
your match is shadowing your color variable, you need to use a different name in the match and then add an if guard
dusky flower
Hmm... it doesn't seem like it's a shadowing issue? I could use an if guard but I was curious if this was the expected behavior when using a match claus this way
rare zinc
yes, the 2nd clause is matching everything
viscid verge
your middle match pattern matches all possible things
you need something like Whine(color: c, ..) if c == color
dusky flower
I was expecting given that c==White
match: [Wine(color: White, ...), Wine(color: Red, ...)]
no match: [Wine(color: Rose, ...), Wine(color: Red, ...)]
viscid verge
Wine(color: c) creates a new variable c (shadowing), it does not match the existing variable c
dusky flower
Oh! That would explain it
viscid verge
so thats what you do if c == color for, to make them match