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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

Adding and subtracting lists

Lists are widely used in functional programming languages, and Elixir is no exception.

Although lists might resemble other languages' arrays, they actually behave more like single-linked lists. Operations with lists are quite common, so in this recipe, we will show you how to add two lists or subtract one list from another.

Getting ready

We will use IEx for this recipe, so start a new session by typing iex in your console.

How to do it…

To add lists, we will use the ++ operator. The steps are as follows:

  1. Create a list named list_one:
    iex(1)> list_one = [1, 3, 5]
    [1, 3, 5]
    
  2. Create a list named list_two:
    iex(2)> list_two = [2, 4, 6, 5]
    [2, 4, 6, 5]
    
  3. Add list_one to list_two:
    iex(3)> list_one ++ list_two
    [1, 3, 5, 2, 4, 6, 5]
    
  4. Add list_two to list_one:
    iex(4)> list_two ++ list_one
    [2, 4, 6, 5, 1, 3, 5]
    

To subtract lists, we will be using the -- operator:

  1. Create a list named list_three:
    iex(5)> list_three = [1, 2, 3, 4, 5, 7, 8, 9]
    [1, 2, 3, 4, 5, 7...

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