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> You're just duplicating the validation logic (or worse, the "objects creation" assumes it's given valid names and does no checks) I think the right way to do
by jfoutz 10y ago
> You're just duplicating the validation logic (or worse, the "objects creation" assumes it's given valid names and does no checks)
I think the right way to do it is with a fold.
- masklinn 10y agoIn Haskell you'd use `mapMaybe :: (a -> Maybe b) -> [a] -> [b]`[0], it's a combined map+filter+map specialised for Maybe (option types). Rust has Iterator::filter_map[1] which does more or less the same thing. [0] http://hackage.haskell.org/package/base-4.9.0.0/docs/Data-Maybe.html#v:mapMaybe http://hackage.haskell.org/package/base-4.9.0.0/docs/Data-Ma... [1] https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.filter_map https://doc.rust-lang.org/std/iter/trait.Iterator.html#metho...