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Elixir Cookbook

Elixir Cookbook

By : Paulo Pereira
4.5 (2)
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Elixir Cookbook

Elixir Cookbook

4.5 (2)
By: Paulo Pereira

Overview of this book

This book is intended for users with some knowledge of the Elixir language syntax and basic data types/structures. Although this is a cookbook and no sequential reading is required, the book’s structure will allow less advanced users who follow it to be gradually exposed to some of Elixir’s features and concepts specific to functional programming. To get the most out of this book, you need to be well versed with Erlang.
Table of Contents (11 chapters)
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10
Index

Combining tuples into a list


Elixir has a tuple data type. A tuple, like a list, can contain different types at the same time but guarantees that its elements are stored contiguously in memory.

Tuples are declared using brackets ({}) and are often used as function return values and in-function pattern matching.

Getting ready

In this recipe, we will be using an IEx session. Start it by executing iex in your console.

How to do it…

We will create two tuples, one with atoms and one with integers, and then we will combine them. To do so, we need to convert them into lists:

  1. Create tuple_one:

    iex(1)> tuple_one = {:one, :two, :three}
    {:one, :two, :three}
    
  2. Create tuple_two:

    iex(2)> tuple_two = {1, 2, 3, 4}
    {1, 2, 3, 4}
    
  3. Try to interpolate these two tuples by combining each value on the nth position of tuple_one with the nth value of tuple_two. We will be using the Enum.zip/2 function:

    iex(3)> Enum.zip(tuple_one,tuple_two)
    ** (Protocol.UndefinedError) protocol Enumerable not implemented for {:one...

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