Alternative to enum.each to process a list

Questions / Help
1

Newbie here
I am using enum.each to process a list and call a function.
I need to return a value other than :ok.
Whats the best alternative for enum.each

Thanks for the help and patience.

Regards

2

If you would like to return the transformed list, you can use Enum.map/2.

Enum.map([1, 2, 3], fn num ->
  num * 2
end)

# [2, 4, 6]
3

Thanks
the list is a list of files.
I need to slice out parts of the file names and return a map or list with info on the file names.

Regards
Thanks again

4

@bww00 I hope we’re not doing your homework for you :wink:

Is it a list of paths to files or the contents?

"./path/to/files"
|> File.ls!()
|> Enum.map(fn path ->
  path
  |> File.read!()
  |> do_something()
end)
5

At least you didn’t ask for my lunch money!!
Last homework I had was 35 years ago.
This old dog is trying to learn some new tricks and what looks like a fantastic language.
Trying to ease into using elixir at work on a couple of small projects were sent my way.

Your help is much appreciated.

Regards and stay safe

2 Likes
6

It’s actually a list of files from a Sftp server

I managed t get sftp_ex working to get connected and a list of files.
Now I have to futz around with the list

Thanks again

7

Ha-ha - about the same. There’s a few of us old dogs here. I suspect higher than average for a “new-ish” language.

Enum.map and Enum.reduce are worth spending a bit of time getting your head around. If you want to dig into them I can recommend Recursion | Learn You Some Erlang for Great Good! and the following chaper on higher order functions - it uses Erlang to explain the concepts, but it provides a good theoretical underpinning of how these work and how you can harness them.

2 Likes
8

Thanks again for your help