How to check if there are multiple of the same thing?

[xft2008 (germ)]

game.Players.PlayerAdded:Connect(function(plr)
	local toolsSaved = toolsDS:GetAsync(plr.UserId .. "-tools") or {}
	
	for i, toolSaved in pairs(toolsSaved) do
		if toolsFolder:FindFirstChild(toolSaved) then 
			toolsFolder[toolSaved]:Clone().Parent = plr.Backpack
			toolsFolder[toolSaved]:Clone().Parent = plr.StarterGear 
		end
	end
	
	plr.CharacterRemoving:Connect(function(char)
		char.Humanoid:UnequipTools()
    end)
end)


game.Players.PlayerRemoving:Connect(function(plr)
	local toolsOwned = {}
	
	for i, toolInBackpack in pairs(plr.Backpack:GetChildren()) do
		table.insert(toolsOwned, toolInBackpack.Name)
	end
	
	local success, errormsg = pcall(function()
		toolsDS:SetAsync(plr.UserId .. "-tools", toolsOwned)
	end)
	
	if errormsg then warn(errormsg) end
end)

First off, this script is a script to save player’s inventory.

Second, I have this unique problem where sometimes you get duplicates of the same item, and I want to check if there are duplicates (when the player joins), and if so, I want to :Destroy() them. (not all, just the duplicates, (you leave the original))

Any help will be appreciated!

[IchVerwendeKeineTool (MinesterioDeSalud)]

a new table called uniqueTools is introduced to keep track of the tools that have already been added to the player’s inventory. When iterating through the saved tools, if a duplicate is found, it is destroyed using the :Destroy() method.

game.Players.PlayerAdded:Connect(function(plr)
    local toolsSaved = toolsDS:GetAsync(plr.UserId .. "-tools") or {}
    local uniqueTools = {}  -- To keep track of unique tools

    for i, toolSaved in pairs(toolsSaved) do
        if toolsFolder:FindFirstChild(toolSaved) then
            -- Check if the tool is already added to the player's inventory
            if uniqueTools[toolSaved] then
                -- Duplicate found, destroy it
                toolsFolder[toolSaved]:Destroy()
            else
                -- Add the tool to the uniqueTools table
                uniqueTools[toolSaved] = true

                -- Clone and add the tool to the player's inventory
                toolsFolder[toolSaved]:Clone().Parent = plr.Backpack
                toolsFolder[toolSaved]:Clone().Parent = plr.StarterGear
            end
        end
    end

    plr.CharacterRemoving:Connect(function(char)
        char.Humanoid:UnequipTools()
    end)
end)

[xft2008 (germ)]

Wow, that was fast!
It works perfectly now thank you!!

[IchVerwendeKeineTool (MinesterioDeSalud)]

Youre welcome, if you need something text me