map¶

In [2]:

val a = List(1, 2, 3, 4)
def f(x: Int): Int = x * 2
println( a.map(f) )
println( a.map(_ * 2) )

List(2, 4, 6, 8)
List(2, 4, 6, 8)

Out[2]:

a: List[Int] = List(1, 2, 3, 4)
defined function f

reduce¶

In [3]:

def g(left: Int, right: Int): Int = left + right
println( a.reduce(g) )
def h(left: Int, right: Int): Int = left * right
println( a.reduce(h) )

10
24

Out[3]:

defined function g
defined function h