(Simple) How to make a set of random numbers that are never the same

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#1

For a map picking system, I need to pick a few random numbers within any range I need that will never be the same as the others. Like this:

Good: 1, 5 ,4

Bad: 5,1,5

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How to prevent math.random from picking the same map
#2

If the range is small, make a table, insert all the numbers that fall under the range into the table, and randomly choose an index, and remove that index from the table.

#3

Thanks bro! It worked. This was the code I wrote:

local table1 = {1,2,3,4,5,6,7,8}

for i = 1, 3 do

local randomIndex = math.random(1, #table1)

print(table.remove(table1,randomIndex))

end
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