DEV Community

Cover image for What I've learned today - 4 - Elixir - Executing a code after load
Luan Gomes
Luan Gomes

Posted on

1 1

What I've learned today - 4 - Elixir - Executing a code after load

Quick tip

Executing code Immediately after loading a Module

Elixir has @on_load which accepts atom as function name in the same module or a tuple with function_name and its arity like {function_name, 0}.

Examples

#Hello module 
defmodule Hello do
@on_load :onload     # this executes after module gets loaded 
  def onload do
    IO.puts "#{__MODULE__} is loaded successfully"
  end
end
# Execution .... Just copy and paste the code in the iex terminal
# You will see the output something like this ....
Elixir.Hello is loaded successfully  
{:module, Hello,
 <<70, 79, 82, 49, 0, 0, 4, 72, 66, 69, 65, 77, 65, 116, 85, 56, 0, 0, 0, 130,
   0, 0, 0, 12, 12, 69, 108, 105, 120, 105, 114, 46, 72, 101, 108, 108, 111, 8,
   95, 95, 105, 110, 102, 111, 95, 95, 9, ...>>, {:onload, 0}}
Enter fullscreen mode Exit fullscreen mode

Alt Text

Obtained from: https://github.com/blackode/elixir-tips

I appreciate everyone who has read through here, if you guys have anything to add, please leave a comment.

Image of Timescale

🚀 pgai Vectorizer: SQLAlchemy and LiteLLM Make Vector Search Simple

We built pgai Vectorizer to simplify embedding management for AI applications—without needing a separate database or complex infrastructure. Since launch, developers have created over 3,000 vectorizers on Timescale Cloud, with many more self-hosted.

Read more

Top comments (0)

Postmark Image

Speedy emails, satisfied customers

Are delayed transactional emails costing you user satisfaction? Postmark delivers your emails almost instantly, keeping your customers happy and connected.

Sign up