scala and ruby composer example

gistfile1.txt

// Scala Example

def composer[A,B,C](f1:B=>C,f2:A=>B):A=>C={
    (n:A)=>f1(f2(n))
  }

  def mul3(n:Int)={n*3}
  
  def add1(n:Int)={n+1}
  
  composer(mul3,add1)(2)



// Ruby Example

make_adder = ->(x){
  ->(n) {n+x}
}

compose= ->(f,g){
  ->(n){f.(g.(n))}
}
add1=make_adder.(1)

add1.(2)

mul3 = ->(n){n*3}


compose.(mul3,add1).(2)