Create enum ranges #17
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enum ranges
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| data Rank = R2 | R3 | R4 | R5 | R6 | R7 | R8 | R9 | R10 | J | Q | K | A | ||
| deriving (Bounded, Enum, Eq, Ord) |
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We noticed this comes from your haskell-exercises repo, it's cool that you had an example handy to use :)
Instead of single-letter names for the contructors, maybe entire words would be more clear? It took us a minute to figure out what J, Q, K, A meant; I think seeing "jack", "queen", etc. could make it more immediately obvious that we're talking about playing cards.
data Rank = Rank2 | Rank3 | Rank4 | Rank5 | Rank6 | Rank7
| Rank8 | Rank9 | Rank10 | Jack | Queen | King | Ace
enum ranges
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| instance Show MyType where | ||
| show Foo = "Foo" | ||
| show Bar = "Bar" | ||
| show Baz = "Baz" | ||
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| instance Enum MyType where | ||
| toEnum 0 = Foo | ||
| toEnum 1 = Bar | ||
| toEnum 2 = Baz | ||
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| fromEnum Foo = 0 | ||
| fromEnum Bar = 1 | ||
| fromEnum Baz = 2 |
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This is great for an in-depth explanation of how Enum works, but I think it's out of scope for the Phrasebook. The circumstances for manually writing Enum seem pretty rare (I don't think I've ever done it). Let's keep this page to derived instances only.
Renamed ranks and added more examples
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I like this example a lot. This'll be released under the creative commons CC BY-NC 4.0 license - Please let us know if that's okay and how you'd like to be attributed (your name, and a link to a blog or social account if you'd like). |
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I am very glad to be helpful :) Everything's okay, and I think a link to my GitHub and my username would be more than enough. |
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