Hi, still pretty new to Elixir. Is there a library equivalent of this? I’ve look but I haven’t found anything that looks right, but I want to make sure before I write a library to do it. It seems pretty general so I just assume it’s eluding me. # recursive get from collections defp getr(x, [hea…

Have a look at the Access behaviour. Access.elem/1 Access.at/1 Access.key/2 etc. iex(1)> users = [{"john", 27}, {"meg", 23}] [{"john", 27}, {"meg", 23}] iex(2)> keys = [Access.at(1), Access.elem(0)] [#Function<1.79554587/3 in Access.at/1>, #Function<2.79554587/3 in Access.elem/1>] iex(…

Ok. There it is I guess. I had seen get_in/2 and thought it would work at first, but the Access behaviour looked like it wouldn’t deal with lists and tuples, so I kept looking. I didn’t see the functions-as-keys approach. Seems clunkier than what I came up with, but I assume I’m missing something. …

[image] decasm: but I assume I’m missing something Functions also work with get_and_update_in/3 update_in/3 and Access.key/2 can return a default value if the entry is not found. There’s also Access.filter/1 and Access.all/0 .

The whole get_in/2 and update_in/3 are Elixir version of lenses which is functional structure for handling and manipulating nested structure. In it core functionality these are 2 functions: get which extracts data from the structure set which put data within structure So get_in/2 can be thought a…

Elixir Programming Language Forum

Standard library suggested addition

Questions & Help Questions

LostKobrakai May 21, 2019, 3:52pm 2

This seems like an implementation of get_in/2.