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util.set: Change '/' operator from filter to map+filter (nil to drop from set, false is a valid item). No code found which depends on current behaviour.

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This commit is contained in:
Matthew Wild 2012-05-24 18:51:18 +01:00
parent 81a34bee5e
commit ea48b240ef
1 changed files with 3 additions and 2 deletions
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5
util/set.lua
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@ -26,8 +26,9 @@ function set_mt.__div(set, func)
local new_set, new_items = _M.new();
local items, new_items = set._items, new_set._items;
for item in pairs(items) do
if func(item) then
new_items[item] = true;
local new_item = func(item);
if new_item ~= nil then
new_items[new_item] = true;
end
end
return new_set;