Untitled notebook

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raise "Error Error!"

raise RuntimeError, message: "An error has occurred😒"

try do
  raise "Oh no!"
rescue
  e in RuntimeError ->
    "#{inspect(e)} error raised" |> IO.puts()

  _ in MatchError ->
    "Match Error" |> IO.puts()

  ArgumentError ->
    "Argument Error" |> IO.puts()
after
  IO.puts("This will always run")
end

# It is adviced to use raise, rescues rather than "throw, catch"
# 1. => The difference between the two is that "throw, catch" is used for control flow, 
# i.e it will stop execution of the function and return a value
# 2. => While "raise, rescue" is used for error handling to signal an error

try do
  divident = 10
  divisor = 0
  if divisor == 0, do: throw(:invalid_operation)
catch
  value -> value
end

defmodule ExampleError do
  defexception message: "This is an ExampleError"
end

try do
  raise ExampleError
rescue
  e in ExampleError ->
    e
end

# Exiting
exit("Oh no")

try do
  exit("I am exiting")
catch
  :exit, reason ->
    reason
end

# # does not run
# try do
#   spawn_link(fn -> exit("Exit") end)
# catch
#   :exit, reason ->
#     reason
# end

nil

kw = [hello: "hello"]
kw[:hello]