Created
May 9, 2019 17:34
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Use MapSets to find differences in new ids vs current/existing ids. This really could be used for any many to many ids table.
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| def diff_ids_update(new, existing) do | |
| # Use MapSets to find differences in new ids vs current/existing ids. This really could be used for any many to many ids table. | |
| new = new |> MapSet.new() | |
| existing = existing |> MapSet.new() | |
| remove = MapSet.difference(existing, new) |> MapSet.to_list() | |
| add = MapSet.difference(new, existing) |> MapSet.to_list() | |
| {remove, add} | |
| end |
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