Installation

• Install mise
• oh-my-zsh plugins:
  • mise: built in
  • elixir
• mise install erlang
• mise install elixir

Commands

• iex - repl
• iex -S mix - repl with deps
• mix local.hex - update hex PM
• mix deps.get - install deps

Resources

Books

• Metaprogramming Elixir
• Programming Ecto
• Programming Elixir
• Programming Phoenix LiveView

Courses

• Full-Stack Phoenix
• LiveView

Syntax

https://github.com/itsgreggreg/elixir_quick_reference

# Comment

:my_atom
`nil`
name = “Josh”
“Strings have double quotes, #{name}”
range = 5..10

Collections

list = [1, 2] # stored as a linked list
length list
Enum.reverse(list)
Enum.join(list, “, “)

tuple = { :a, :b } # stored contiguous in memory

keyword_list = [{:a, “one”}, {:b, 2}]
shorthand = [a: “one”, b: 2]
Keyword.keys(keyword_list)
Keyword.get_keys(keyword_list)

map = %{:a => 1, 1 => [“list”]}
Map.keys(map)
Map.put(map, :b, 2)

defmodule Person do
  defstruct name: “”, age: 0
end
josh = %Person{name: “Josh”, age: 43}
josh.name
%Person{ josh | name: "Joshua" }

Functions

anon_func = fn num -> num + 2 end
support_method = fn ("suspenders")   -> IO.puts "Hey big spender."
                      ("belt")         -> IO.puts "Who is the real hero?"
                      a when is_list a -> Enum.each(a, support_method)
                      _                -> IO.puts "What is this wizzardry?"
                   end

defmodule MyModule do
  def my_function(“Josh”) do
    IO.puts("Hello Josh!!!”)
  end

  def my_function(name), do: IO.puts(“Hello #{name}.”)

  defp private_func do
  end
end

Comprehensions

for num <- [1, 2, 3, 4], rem(num, 2) == 0, do: num * num