Elixier mit
defmodule SomeModule do
require Logger
@doc """
iex> SomeModule.do_something("Richard")
{:ok, "Message sent!"}
iex> SomeModule.do_something("Jian")
{:error, "Invalid phone number"}
iex> SomeModule.do_something("Erlich")
{:error, "Not found"}
"""
def do_something(name) do
with {:ok, phone_number} <- look_up(name),
:sent <- send_text(phone_number) do
{:ok, "Message sent!"}
end
end
def do_something_and_log_error(name) do
with {:ok, phone_number} <- look_up(name),
:sent <- send_text(phone_number) do
{:ok, "Message sent!"}
else
{:error, error_msg} = error ->
Logger.error(error_msg)
error
end
end
defp look_up("Richard"), do: {:ok, "+15629998888"}
defp look_up("Jian"), do: {:ok, "+864009999999"}
defp look_up(_), do: {:error, "Not found"}
defp send_text("+1" <> _phone_number), do: :sent
defp send_text(_), do: {:error, "Invalid phone number"}
end
Uncommon Nightingale