Introducing Elixir to Rubyist

intro.ex

# This is a comment
# The first thing in any language

next_integer_after = fn x -> x+1
end
 
# This is an annoymous function.
# called inside function as next_integer_after(3)

defmodule ModuleName do
# this is a module
end

defmodule SomeModule do
  def public_method do
  end
end
# called as public_method or SomeModule.public_method

defmodule SomeModule do
  defp private_method do
  end
end
# called inside module by just private_method

# one more common stuff we do. Concatenation of strings
first_name = "lorem"
last_name = "epsum"

full_name = first_name <> " " <> last_name

# lets make it a simple anonymous function,
greet_person = fn {greeting, first_name, last_name} ->
  greeting <> first_name <> last_name
end

# But we may not always have greeting present.
# How about default greet ?

greet_person = fn {greeting // "hi", first_name, last_name} ->
  greeting <> first_name <> last_name
end

called as greet_person.({"good morning", "Anil", "W"})

# But we are so many people here.
# ok, lets have one more.

greet_team = fn
when {greeting // "hi", team} ->
  greeting <> " " <> team
end

{greeting // "hi", first_name, last_name} ->
  greeting <> first_name <> last_name
end