skedaddl3
How to access all values in a list of map using an identifier?
I have a list of maps containing different values
list =
[
%Samp1{
id: "11111",
sample_data1: "",
sample_data2: "",
other_datas: {}
},
%Samp2{
id: "22222",
sample_data1: "",
sample_data2: "",
other_datas: {}
},
%Samp3{
id: "33333",
sample_data1: "",
sample_data2: "",
other_datas: {}
},
]
How can i get all the values along with the ID i want to match, For Example:
if id == “33333” i want to traverse and get all values with it, so the expected result should be:
%Samp3{
id: "33333",
sample_data1: "",
sample_data2: "",
other_datas: {}
},
I tried Enum.map but I can only fetch single value each
list |> Enum.map(& &1.id)
Result: ["11111", "22222", "33333"]
Marked As Solved
trisolaran
Enum.filter(list, & &1.id == id)
Or did I misunderstand? ![]()
1
Also Liked
benwilson512
Author of Craft GraphQL APIs in Elixir with Absinthe
Hi @skedaddl3 the function you’re looking for is Enum — Elixir v1.14.2 whoops! I mean Enum — Elixir v1.14.2
2
kokolegorille
Enum.find will stop after first match… probably for comprehension, with filter on id would do the trick.
1
Popular in Questions
What’s the safe way to decode a JSON string into a struct? I want to avoid calling String.to_atom. Jason.decode can give me a map with st...
New
How to handle excepions in elixir? Suppose i have A, B, C ,D, E modules. and each module has get() function. A.get() method will call th...
New
In asking this question I am more interested about the expressiveness of the language itself and less concerned about the availability of...
New
Hello all!
I am typing this post from my new MacBook Pro with the M1 chip. I’m loving it so far, and will probably use it as my daily dr...
New
Student & New to elixir. Nice language.
I want to convert a english character, e.g. “a”, which is stored in a variable, to it’s asci...
New
I am using Ecto timestamps with postgres, I can see the timestamps() use the :naive_dateime but for my use case I wanted to store the ti...
New
ExUnit now has describe blocks which is a welcome addition coming from RSpec. In the docs, it states that nested hierarchies of describe ...
New
About me? ( if you have nothing better to do than reading about some random guy in the internet :stuck_out_tongue: )
Hello all, this is ...
New
Mix format works fine if run from the cmd. I’ve followed this to facilitate the implementation into VSC which involves downloading an ext...
New
I’ve been re-reading swift book again and noticed that multiline strings there don’t have a trailing line break, unlike in elixir
iex(2)...
New
Other popular topics
Hi everyone,
One of the features added to Elixir early on to help integration with Erlang code was the idea of overridable function defi...
New
Here are few pieces of (common) Linux knowledge that we use for reasonably small one server apps. We use Ubuntu but this should work for ...
New
In the Dialyzer docs ( http://erlang.org/doc/man/dialyzer.html#requesting-or-suppressing-warnings-in-source-files ), there is a way to tu...
New
I have a server on AWS, and was running a load test using artillery. When looking at the Phoenix dashboard I see the Ports going to 100% ...
New
As the title describes, I’m trying to run Enum.map() over a list of key/value pairs, where the value is a map. My data looks like this:
...
New
Elixir plugin for JetBrain’s IntelliJ Platform (including Rubymine)
This is a plugin that adds support for Elixir to JetBrains IntelliJ...
New
How to set Jason to encode all fields in ecto schema, I don’t care about security and implementing only is taking long list of attributes...
New
When I run the Plug and I recompile I wind up having to use Ctrl C to quit iex and start again. Witht the help of rlwrap I can use the cu...
New
Surface is an experimental library built on top of Phoenix LiveView and its new LiveComponent API that aims to provide a more declarative...
New
Original source of discussion: This topic on the Pragmatic Programmers' Functional Web Development with Elixir, OTP, and Phoenix forum.
...
New








