Functional Programming with ReasonML/

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In this lesson, we'll explore labeled parameters and why they are useful.

We'll cover the following...

The Position of a Parameter

So far in the course, the arguments in a function have had fixed positions. In other words, the order of inputs must be maintained when calling the function.

Here’s an example:

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type superhero = {
  realName: string,
  heroName: string
};
let createHero = (realName, heroName) => {
  realName,
  heroName
};
let real = "Bruce Wayne";
let hero = "Batman";
/* Correct Order */
let correctBatman = createHero(real, hero);
Js.log(correctBatman);
/* Incorrect Order */
let incorrectBatman = createHero(hero, real);
Js.log(incorrectBatman);

In line 19, we reversed the order of our parameters, however, since the function was defined with the first ...