How to make a Check Duplicate Script

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#1

i have this script that check if the player has a duplicated items in there backpack
if the script founds one it will delete the duplicated item
but it dosent work
this is the script

p = game.Players:GetChildren()

config = { tooltype1 = "Tool",
		tooltype2 = "HopperBin",
		waitt = 5,
		}
tools = { }

while true do
	wait(config.waitt)
	for i = 1,#p do
		if p[i].className == "Player" then
			t = p[i].Backpack:GetChildren()
			for i = 1, #t do
				if (t[i].className == config.tooltype1) or (t[i].className == config.tooltype2) then
					table.insert(tools, string.lower(t[i].Name))
				end
			end
			table.sort(tools)
			for i = 1, #tools do
				if tools[i] == tools[i-1] then
					t[i]:remove()
					table.remove(tools, i)
				end
			end
		end
	tools = { }
	end
end
1 Like
#2 
-- reference to tool that you want to give to the player
local toolToGive = tool

-- try to find a tool with the same name as the tool that you want to give
local playerBackpackTool = player.Backpack:FindFirstChild(toolToGive.Name) or player.Character:FindFirstChild(toolToGive.Name)

-- if tool with same name doesn't exist then
if not playerBackpackTool then
    -- give tool to player
    toolToGive:Clone().Parent = player.Backpack
end
1 Like
#3 
local Players = game:GetService("Players")
local Player = Players.LocalPlayer
local Character = Player.Character or Player.CharacterAdded:Wait()
local Backpack = Player:WaitForChild("Backpack")

local function RemoveDuplicateTools()
	local ToolQuantities = {}
	local EquippedTool = Character:FindFirstChildOfClass("Tool")
	if EquippedTool then
		ToolQuantities[EquippedTool.Name] = 1
	end
	
	for _, Tool in ipairs(Backpack:GetChildren()) do
		if not ToolQuantities[Tool.Name] then
			ToolQuantities[Tool.Name] = 1
		else
			ToolQuantities[Tool.Name] += 1
		end
	end

	for ToolName, ToolQuantity in pairs(ToolQuantities) do
		if ToolQuantity > 1 then
			for Index = 1, ToolQuantity - 1 do
				local Tool = Backpack:FindFirstChild(ToolName)
				if Tool then
					Tool:Destroy()
				end
			end
		end
	end
end
RemoveDuplicateTools()

Character.ChildAdded:Connect(RemoveDuplicateTools)
Backpack.ChildAdded:Connect(RemoveDuplicateTools)

Tested and works, local script inside StarterCharacterScripts.

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