Implementation of null function
I have to learn Haskell for university and therefor I'm using learnyouahaskell.com for the beginning.I always used imperative languages so I decided to practice Haskell by coding a lot more than I...
View ArticleAnswer by shree.pat18 for Implementation of null function
Because _ literally means anything apart from explicitly specified patterns. When you specify (_:_) it means anything which can be represented as a list containing at least 1 element, without bothering...
View ArticleAnswer by leftaroundabout for Implementation of null function
You can't just turn the clauses around with your solution:mNull' :: [a] -> BoolmNull' _ = FalsemNull' [] = Truethis will always yield False, even if you pass an empty list. Because the runtime...
View ArticleAnswer by dfeuer for Implementation of null function
I'll add on to what leftaroundabout said. This is not really a potential concern for the list type, but in general, data types sometimes get modified. If you have an ill-conceiveddata FavoriteFood =...
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