Need help with transforming items.

[Qbee]

Hi there. Im learning lua since a couple of days, and i just need a little help out. Let's say i need a script which works like that: When player use item1 on item2, then item2 has 50% chance to transform into item3 and 50% chance to transform into item4. I hope that someone can help me.

Thanks in advance.

@edit

Oh god it's wrong section, im so sorry.

 

[Cykotitan]

Newbie version:

-- We'll be using TRUE and FALSE for backwards compatibility with both TFS 0.3 and 0.2
function onUse(cid, item, fromPosition, itemEx, toPosition)
	-- itemEx is the item that we clicked on either with right mouse button or using Use with... (depends on Control settings in client)
	-- Since it's actually a table, we need to call field itemid
	if itemEx.itemid == 2500 then
		-- Found match
		local random = math.random(1, 2) -- Randomizing
		if random == 1 then -- In case the random number is 1
			doTransformItem(itemEx.uid, 2400)
		elseif random == 2 then -- In case it's 2
			doTransformItem(itemEx.uid, 2450)
		end
		return TRUE -- placed it here because item was used on correct itemEx and we don't want 'You cannot use this object.' to popup
	end
	return FALSE -- If we return FALSE or nothing (nil), the player will receive 'You cannot use this object.' message
	-- Notice: FALSE is the same as boolean false in TFS 0.3, and number 0 in TFS 0.2
end

Not readable:

function onUse(cid, item, fromPosition, itemEx, toPosition)
	local random = math.random(2)
	return itemEx.itemid == 2500 and doTransformItem(itemEx.uid, random == 1 and 2400 or 2450) and TRUE or FALSE
end

The right way:

local config = {
	useOnItem = 2500,
	table = {
		{randomRange = {1, 50}, item_id = 2400},
		{randomRange = {51, 100}, item_id = 2450}
	}
}
function onUse(cid, item, fromPosition, itemEx, toPosition)
	if itemEx.itemid == config.useOnItem then
		local random = math.random(100)
		for _, v in pairs(config.table) do
			if random >= v.randomRange[1] and random <= v.randomRange[2] then
				return TRUE, doTransformItem(itemEx.uid, v.item_id)
			end
		end
	end
	return FALSE
end

more:

local config = {
	useOnItem = 2500,
	table = {
		[2400] = {1, 50},
		[2450] = {51, 100}
	}
}
function onUse(cid, item, fromPosition, itemEx, toPosition)
	if itemEx.itemid == config.useOnItem then
		local random = math.random(100)
		for item_id, range in pairs(config.table) do
			if random >= range[1] and random <= range[2] then
				return TRUE, doTransformItem(itemEx.uid, item_id)
			end
		end
	end
	return FALSE
end