이 season
함수는 대수 함수를 사용하지만 코드가 반복되는 것처럼 느낍니다.
최대한 짧게하려면 어떻게해야합니까?
data Month = Jan | Feb | Mar | Apr | May | June | July | Aug | Sept| Oct | Nov | Dec
deriving (Eq,Ord,Show,Read)
data Seasons = Spring | Summer | Autumn | Winter
deriving (Eq,Ord,Show,Read)
season :: Month -> Seasons
season Jan = Winter
season Feb = Winter
season Mar = Spring
season Apr = Spring
season May = Spring
season June = Summer
season July = Summer
season Aug = Summer
season Sept = Autumn
season Oct = Autumn
season Nov = Autumn
season Dec = Winter
함수와 생성자를 단일 문자로 이름을 바꾸면 단축됩니다 %)
—
luqui