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prefer map access syntax

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Adam Millerchip 2022-12-08 02:21:36 +09:00
parent d8c7478ad6
commit 7bde581e50
1 changed files with 3 additions and 3 deletions
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2022/day7.exs
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@ -24,7 +24,7 @@ defmodule Day7 do
end end
defp put_dir_size(path, tree) do defp put_dir_size(path, tree) do
{:dir, nil, paths} = Map.get(tree, path) {:dir, nil, paths} = tree[path]
size = tree |> Map.take(paths) |> Enum.map(fn {_, {_, size, _}} -> size end) |> Enum.sum() size = tree |> Map.take(paths) |> Enum.map(fn {_, {_, size, _}} -> size end) |> Enum.sum()
Map.put(tree, path, {:dir, size, paths}) Map.put(tree, path, {:dir, size, paths})
end end
@ -33,7 +33,7 @@ defmodule Day7 do
defp dirs_fewest_descendents_first(_tree, [], found_dirs), do: found_dirs defp dirs_fewest_descendents_first(_tree, [], found_dirs), do: found_dirs
defp dirs_fewest_descendents_first(tree, [node | rest], dirs) do defp dirs_fewest_descendents_first(tree, [node | rest], dirs) do
case Map.get(tree, node) do case tree[node] do
{:file, _size, nil} -> dirs_fewest_descendents_first(tree, rest, dirs) {:file, _size, nil} -> dirs_fewest_descendents_first(tree, rest, dirs)
{:dir, _size, paths} -> dirs_fewest_descendents_first(tree, paths ++ rest, [node | dirs]) {:dir, _size, paths} -> dirs_fewest_descendents_first(tree, paths ++ rest, [node | dirs])
end end
@ -72,7 +72,7 @@ defmodule Day7 do
def part2(input) do def part2(input) do
tree = filetree_with_dir_sizes(input) tree = filetree_with_dir_sizes(input)
{:dir, space_used, _} = Map.get(tree, @root) {:dir, space_used, _} = tree[@root]
unused_space = @total_size - space_used unused_space = @total_size - space_used
space_to_free = @space_needed - unused_space space_to_free = @space_needed - unused_space