Gain insights into Elixir's functional programming fundamentals, explore expressions, modules, conditional statements, recursion, and delve into advanced topics like higher-order functions and application design. Discover Elixir's vibrant community and tooling.

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elixir.tar.gz

Elixir

Elixir-SPA

Elixir-SPA-cleared

Elixir script

Elixir-SPA-script

Elixir-SPA-copy all

Elixir-SPA-copy all-dungeon

Elixir-test

Elixir-SPA-test

Elixir is a functional programming language that runs in the Erlang VM, a powerful environment to run distributed systems. This course uses Elixir because of its fun syntax, vibrant community, and production-ready tooling. Elixir syntax lets you focus on what’s important while learning functional programming.

Starting from scratch, you will learn the fundamentals of Elixir including expressions, modules, conditional statements, and recursion. Towards the end of the course, you will focus on more advanced material like higher-order functions, how to handle impure functions, and lastly how to design an application using Elixir and functional programming principles.

By the end, you will be able to write basic Elixir programs that follow the functional programming paradigm.

Learn Functional Programming with Elixir

A game where you only face an enemy and find an exit isn’t that interesting. A game should have more challenges and places to explore. You can use your imagination to create additional interesting ideas for the game you built in Chapter 7, [*Designing Your Elixir Applications*](https://www.educative.io/courses/functional-programming-elixir/starting-your-project-with-mix). Here are some suggestions that you can implement in your game.

# Trap trigger

defmodule DungeonCrawl.Room.Triggers.Trap do 
  alias DungeonCrawl.Room.Action
  alias Mix.Shell.IO, as: Shell

  @behaviour DungeonCrawl.Room.Trigger

  def run(character, %Action{id: :forward}) do
    Shell.info("You're walking cautiously and can see the next room.") 
    {character, :forward}
  end

  def run(character, %Action{id: :search}) do
    damage = 3

    Shell.info("You search the room looking for something useful.") 
    Shell.info("You step on a false floor and fall into a trap.") 
    Shell.info("You are hit by an arrow, losing #{damage} hit points.")
    {
      DungeonCrawl.Character.take_damage(character, damage), 
      :forward
    }
  end
end

The trap trigger works like this: if the player tries to search the room, they'll fall into a trap. When the clause matches, the `:search` action will make the hero lose hit points. We can use `DungeonCrawl.Character.take_damage/2` to reduce the hero’s health. 

# Treasure trigger

We can make a similar version of the trigger and create one that restores the hero’s health:

Find extra challenges to the game you developed.

Getting Started

Introduction to Functional Programming

Working with Variables and Functions

Using Pattern Matching to Control Program Flow

Diving into Recursion

Using Higher-Order Functions

Designing Your Elixir Applications

Handling Impure Functions

Conclusion

Appendices

Appendix 2: Adding Rooms to the Game

Trap trigger