所以我正在尝试构建一个函数,它接受一个元组列表并找到具有最大第二元素的元组.但我得到一个模式匹配错误.
这是我的代码.
resultTuple :: [((Int,Int),Int)] -> (Int,Int)
resultTuple [] = error "something wrong"
resultTuple [x] = fst(x)
resultTuple (x:y:xs)
| snd(x) >= snd(y) = resultTuple(x:xs)
| snd(x) < snd(y) = resultTuple(y:xs)
这是我的错误.
Pattern match(es) are non-exhaustive
In an equation for ‘resultTuple’: Patterns not matched: (_:_:_)