gistfile1.txt

# A

## A1
func mutate(in *integer) {
  in + 1
}

## A2
func mutate(int integer) int {
  return i+1
}

This is mostly in line with functional programming right?

# B
type struct foo {
  value int
}

## B1
func(f foo) mutate() foo {
  f.value + 1
  return f
}

## B2
func(f *foo) mutate() {
  f.value+1
}