That is why @LostKobrakai suggested to use a filter with for 
If You set up correctly the filter, You will iterate only for the values You want.
kokolegorille
ycv005
Can you tell me how to do? Modify my code please and tell me. I can’t figure out. Its been 10 hr looking onto it.
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kokolegorille
From documentation linked…
# A comprehension with a generator and a filter
for n <- [1, 2, 3, 4, 5, 6], rem(n, 2) == 0, do: n
[2, 4, 6]
This will take each 2 elements.
Is this what You are looking for?
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peerreynders
Get rid of the for comprehension and define a function in the view to do the work
<%= form_for second_changeset(@candidate_pipelines), "#", [class: "d-inline", phx_change: "update_candidate_stage"], fn f -> %>
<input type="hidden" value="<%= candidate_pipeline.id %>" name="candidate_id"/>
<%= select f, :job_stage_id, Enum.map(@job_stages, &{&1.name, &1.id}), [class: "custom-select custom-select-sm"] %>
<% end %>
For example you can pick the second element in a list this way:
iex(1)> second = fn [_, value| _] -> value end
#Function<6.128620087/1 in :erl_eval.expr/5>
iex(2)> list = [1,2,3]
[1, 2, 3]
iex(3)> second.(list)
2
iex(4)>
Example of defining view functions (page_view.ex) being used in index.html.eex
1
kokolegorille
ycv005
Can I do something like this-
Enum.at( @candidate_pipelines, get_current_pipeline_index(__something___)).id
Can I access “id” like this or other attributes like this?
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peerreynders
iex(1)> list = [%{id: 1}, %{id: 2}, %{id: 3}]
[%{id: 1}, %{id: 2}, %{id: 3}]
iex(2)> second = Enum.at(list,1)
%{id: 2}
iex(3)> IO.puts("#{inspect(second.id)}")
2
:ok
iex(4)> list |> Enum.at(1) |> Map.get(:id)
2
iex(5)>
What is stopping you from assigning the necessary candidate and changeset in the controller for easy access in the template?
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