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util.array: Add method for filtering out duplicate values

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Kim Alvefur 2017-03-31 17:29:08 +02:00
parent 7b5aa05b02
commit 72018f7be7
1 changed files with 12 additions and 0 deletions
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12
util/array.lua
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@ -92,6 +92,18 @@ function array_base.sort(outa, ina, ...)
return outa;
end
function array_base.unique(outa, ina)
local seen = {};
return array_base.filter(outa, ina, function (item)
if seen[item] then
return false;
else
seen[item] = true;
return true;
end
end);
end
function array_base.pluck(outa, ina, key)
for i = 1, #ina do
outa[i] = ina[i][key];