So you want a tree, got it.
Though I still have to point out that the file you have pasted does not look like CSV.
And I can show you how I would solve this but still – what else have you tried? F.ex. do you know about Enum.reduce_while?
dimitarvp
1
sabo66
Yes
Yes it’s a CSV the separator is ‘=>’
I’m new in Elixir and functional programming, I will looking Enum.chunk_while and I don’t know yet Enum.reduce_while I will also look this function thank you 
0
al2o3cr
That’s… not a thing.
The strict definition of a CSV would be a file that conforms to RFC4180 - comma delimited, fields with commas escaped with " etc
The “loose” definition expands that to using single characters other than , (tabs, pipes, etc) as a delimiter.
But saying “the delimiter is =>” stretches that definition beyond reason.
Regarding your original question, +1 for starting with Stream.chunk_while. A possible sequence of operations could look like this:
- use
Stream.chunk_whileto bring together each line starting with a letter and all the following lines that start with a number Stream.flat_mapover each of those chunks:- one row of output with
number: nilfor the line that starts with the letter - one row of output for each line that starts with a number using the letter from above
- one row of output with
2
sabo66
Oh ok ! thank you for the correction
Yes it’s what I’m trying to get, I will try that thank you very much
0
zachdaniel
Creator of Ash
To answer your specific question: no, you cannot assign a value to a variable in a higher scope
So even if it was a good idea, you couldn’t do it.
2
sabo66
D4no0
zachdaniel
Creator of Ash
D4no0
Oh my god, love it, especially the multiple inheritance part! 
Finally I can write code like a normal human being.
1