I can’t even begin to say how much it opened my mind to FPs in general. Particularly, for me, as I do full time OOP every day ( aka, from jvm world).
There isn’t just one thing that I’ve come across and I’d say shut the f* up.. this can be done? apart from what others have said, the absolute one thing that still astonishes me is the simple, yet most powerful concept of Erlang/Elixir is the pattern matching.
There’s this simple, argument pattern matching for argument – which is ok I believe, but slicing & dicing the input, simply blew my socks off!
Below is something I’m currently on
defmodule Decoder do
# 10 byte metadata
# 5 bytes
@redis_signature <<"REDIS"::utf8>>
# 4 bytes - big endian
@version <<3::big-size(24)>>
# 1 byte
@db_selector <<254::size(8)>>
def read_metadata(
<<@redis_signature, version::big-size(24), @db_selector,
actual_data::bitstring>>
) do
end
