scala currying by nested functions or by multiple parameter lists
- by Morgan Creighton
In Scala, I can define a function with two parameter lists.
def myAdd(x :Int)(y :Int) = x + y
This makes it easy to define a partially applied function.
val plusFive = myAdd(5) _
But, I can accomplish something similar by defining and returning a nested function.
def myOtherAdd(x :Int) = {
def f(y :Int) = x + y
f _
}
Cosmetically, I've moved the underscore, but this still feels like currying.
val otherPlusFive = myOtherAdd(5)
What criteria should I use to prefer one approach over the other?
