fun mystery(a, b::bs) = if a = b then mystery(a, bs) else b::mystery(a, bs) | mystery(a, []) = [];What is the type of
mystery
? What is the value of mystery(3,[3,2,1,2,3])
? What happens if you try mystery(3.0,[3.0,2.0])
? Why?
irr
for int*real->real
.foldr
and map
can be used in ML to start with
the list [4,5,6]
and produce the list [8,8,10,10,12,12]
,
in which each value has been "doubled" in two senses of the word:
multiplied by two and repeated twice.