Skip to content

[Sync Iteration] elixir/sum-of-multiples/1 #24

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
exercism-solutions-syncer wants to merge 1 commit into
base: main
Choose a base branch
from
Open

[Sync Iteration] elixir/sum-of-multiples/1 #24

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
18 changes: 18 additions & 0 deletions solutions/elixir/sum-of-multiples/1/lib/sum_of_multiples.ex
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
defmodule SumOfMultiples do
@doc """
Adds up all numbers from 1 to a given end number that are multiples of the factors provided.
"""
@spec to(non_neg_integer, [non_neg_integer]) :: non_neg_integer
def to(limit, factors), do: gen_score(factors, limit - 1)

defp gen_score(scores \\ [], factors, limit)
defp gen_score(scores, [], _), do: scores |> MapSet.new() |> Enum.sum()
defp gen_score(scores, [0 | tail], max), do: gen_score([0 | scores], tail, max)
defp gen_score(scores, [factor | tail], max) do
factor
|> Range.new(max, factor)
|> Range.to_list()
|> Kernel.++(scores)
|> gen_score(tail, max)
end
end