path to fp - partial function applicaiton

five.scala

val addCurried: Int => Int => Int = (add _).curried
print(addCurried(1)(2))

four.scala

def addPrime(a: Int)(b: Int): Int = a + b
println(addPrime(1)(1))

val add2Prime: Int => Int = addPrime(2)_
println(add2Prime(2))

one.scala

// we define our base function
def add(a: Int, b: Int): Int = a + b

println(add(1,2))

three.scala

val add3: Int => Int = add(3, _: Int)

two.scala

def add2(b: Int): Int = add(2, b)

println(add2(2))