λ
Size: a a a
λ
λ
AS
AS
AS
E
E
E
def numberOfVowels(str: String) =
str.filter(Seq('a', 'e', 'i', 'o', 'u').contains(_)).length
E
E
Seq('a', 'e', 'i', 'o', 'u').contains(_)
, то нетE
contains
?GP
Seq('a', 'e', 'i', 'o', 'u').contains(_)
, то нетGP
E
w
Oℕ
E
Oℕ