Module:TableTools: Difference between revisions
add getUnion function
m>Mr. Stradivarius (add a fancy introductory comment) |
m>Mr. Stradivarius (add getUnion function) |
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end | end | ||
end | end | ||
--[[ | |||
------------------------------------------------------------------------------------ | |||
-- getUnion | |||
-- | |||
-- This returns the union of the values of n tables, as an array. For example, for | |||
-- the tables {1, 3, 4, 5, foo = 7} and {2, 3, 5, bar = 6}, getUnion will return | |||
-- {1, 2, 3, 4, 5, 6, 7}. | |||
------------------------------------------------------------------------------------ | |||
--]] | |||
function p.getUnion(...) | |||
local arrays = {...} | |||
local vals, ret = {}, {} | |||
for _, t in ipairs(arrays) do | |||
for k, v in pairs(t) do | |||
vals[v] = true | |||
end | |||
end | |||
for val in pairs(vals) do | |||
ret[#ret + 1] = val | |||
end | |||
table.sort(ret) | |||
end | |||
--[[ | --[[ | ||