Explore ReasonML's growing popularity and its strong-typed syntax for JavaScript. Learn about creating data objects, functions, and data structures through interactive quizzes and exercises.

ReasonML has been skyrocketing in popularity lately, and for good... reason. Very recently developed by Facebook, it provides users a strong-typed, clean, and efficient syntax for JavaScript, which makes it great for web development. 

This course will get you up to speed programming in Reason. You'll start by learning how to create simple data objects and build up to more powerful tools such as functions and data structures. Along the way, interactive quizzes and exercises will help you gain a stronger grasp of the language.

Anyone looking to put themselves on the cutting-edge of web development would be well served to have a look at this course.

Functional Programming with ReasonML

Which of these pairs of properties hold true for a tuple?

Which of these pairs of properties hold true for a tuple?

What will the following piece of code print?

```reason
let x = (1, 2, 3, (4, 5));
let(_, _, _, y) = x;

Js.log(y);
```

What will the following piece of code print?
<pre><code class="language-reason">let x = (1, 2, 3, (4, 5));
let(_, _, _, y) = x;

Js.log(y);
</code></pre>

The different identifiers which store values in a record are called ______ .

The different identifiers which store values in a record are called ______ .

```reason
let {name, coordinates: {longitude, latitude}} = atlantis;
longitude;
```

```reason
let {_, coordinates: {longitude, latitude}} = atlantis;
longitude;

```reason
let {_, coordinates: {longitude, _}} = atlantis;
longitude;

```reason
let {_: {longitude, _}} = atlantis;
longitude;

What pattern could be used to obtain the `longitude` value in the following `atlantis` record?

```reason
type coordinates = {
  longitude: float,
  latitude: float
};

type city = {
  name: string,
  coordinates: coordinates
};

let coordinates = {
  longitude: 66.6,
  latitude: 77.7
};

let atlantis: city = {
  name: "Atlantis",
  coordinates
};
```

What pattern could be used to obtain the <code>longitude</code> value in the following <code>atlantis</code> record?
<pre><code class="language-reason">type coordinates = {
 longitude: float,
 latitude: float
};

type city = {
 name: string,
 coordinates: coordinates
};

let coordinates = {
 longitude: 66.6,
 latitude: 77.7
};

let atlantis: city = {
 name: &quot;Atlantis&quot;,
 coordinates
};
</code></pre>

The elements of an array are mutable.

What operators are used to enclose the elements of an array?

What operators are used to enclose the elements of an array?

Test your knowledge of ReasonML's data structures with this quiz.

A Brief Introduction

Data Types

Identifiers

Data Structures

Conditional Expressions

Functions

Loops

Variants

Objects

Quiz