scala, Passing an operator as argument of a function

Question

I have this code:

for( i <- 0 to 8){
  ((numbers(i) - i)/3).abs + ((numbers(i) - i)%3).abs
}

and I would like to do, as the title says, some

Answer 1

To get rid of the underscores you need to define the functions as values.

val / = (a:Int, b: Int) => a / b
val % = (a:Int, b: Int) => a % b

def by3(a: Int, b: Int, fn: (Int, Int) => Int): Int = fn(a - b, 3).abs

(0 to 8).foreach(i => by3(numbers(i), i, /) + by3(numbers(i), i, %))