OCaml - Function - Creating a getter to retrieve an element of a tuple

Submitted by Mi-K on Tuesday, February 28, 2012 - 1:45pm

OK, this is not really a getter implementation like we can have it in other object-oriented programming, but it is close of it.

We have first to create an human variable with a tuple ("name", age).
Then we have to create two getter functions to retrieve the first and the second parameter of this human variable.

Let's begin by the human variable:

# let human = ("John", 50);;

val human : string * int = ("John", 50)

Let's continue by the getName function:

# let getName(a,b)=a;;

val getName : 'a * 'b -> 'a = <fun>

Do the same for the getAge function:

# let getAge(a,b)=b;;

val getAge : 'a * 'b -> 'b = <fun>

Finally we can reach each of elements in tuple of the human variable.
For example we can get the name of it:

# getName(human);;

- : string = "John"

Great job, you made it!