I am new to Lua scripting and facing issues while creating Set in Lua. I am trying to store unique elements in Lua Set using below code but it isn't working as expected.
local function test()
local t1 = {11,11,22,33,33,44,55,66,77,88,99}
local t = {}
for i, v in ipairs(t1)
do
t[v] = v
end
return t
end
This function is supposed to return unique elements from t1 but it's returning empty array. I think I am doing something wrong but can't figure out what. Can someone help?
Read lot about Lua Sets still couldn't figure out issue. Tried running script locally in docker with different modifications/approaches but nothing helped
Redis converts Lua table to array reply, and you MUST ensure that your Lua table is an array, i.e. index (table key) starting with 1.
However, in your case, t[1] is nil, and Redis takes it as an empty array.
In order to fix the problem, you need to convert t to an array:
-- Your original code generating table `t`
-- Then convert `t` to an array.
local res = {}
for k, v in pairs(t) do
res[#res + 1] = v
end
return res