Weighted selections

So, you want to make loot tables? Too bad, I'm telling you anyway. Loot tables are simple enough - Consider a table where every key is the unique loot, and every value is the probability of it being dropped (relative to the others)

Loot = {
  Loot1 = 1;
  Loot2 = 3;
  Loot3 = 10;
  ReallyFarTooCommonLoot = 1000;
}

Then, we can generate that table into an array of values:

newLoot = {}
for k,v in next, Loot do
  for i=1, v do
    newLoot[#newLoot+1] = k
  end
end
Loot = newLoot;

And then we can randomly select an entry from that loot table array.

Drop = Loot[math.random(#Loot)]

And now you have your chosen drop, with a weighted chance of selection.

This is just an idea on how you could go about doing this

So you could use a random number and have a table and based on the random number, one of the items in the table is chosen.

local items = {"common","common","common","common","uncommon","common","common",
"common","common","uncommon","rare"}

Then say whatever happens, and they are going to get the item

local items = {"common","common","common","common","uncommon","common","common",
"common","common","uncommon","rare"}
local chosen = items[math.random(1,#items)] -- gets a random one from the list
print(chosen)

Then just if the item is common then whatever, elseif it is uncommon then whatever, elseif it is rare then whatever.

local items = {"common","common","common","common","uncommon","common","common",
"common","common","uncommon","rare"}
local chosen = items[math.random(1,#items)] -- gets a random one from the list
print(chosen)
if chosen == "common" then
    --Do whatever you want
elseif chosen == "uncommon" then
    --Do whatever
elseif chosen == "rare" then
    --Do whatever
end

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