Untitled notebook

Section

# input
list = [1, 2, 3]
# output: [2, 4, 6] 

Enum.map(list, fn element -> element * 2 end)

list

list = [1, 2, 3]

my_function = fn ->
  list = [4, 5, 6]

  list
end

# my_function.()

# list

list = [4, 5, 6]

list

Pattern Matching

[a, b, c | _tail] = Enum.to_list(1..100)

c

names = ["Jon", "Bill"]

case names do
  [] -> "Where is everyone?"
  [name] -> "Hello #{name}!"
  names -> "Hello Everyone!"
end

defmodule Greeting do
  def hello([] = names) do
    "Where is everyone?"
  end

  def hello([name] = names) do
    "Hello #{name}"
  end

  def hello([name1, name2, name3] = names) do
    "Hello #{name1}, Hi #{name2}, Heya #{name3}"
  end

  def hello(_names = names) do
    "Hey Everyone"
  end
end

Greeting.hello([""])