How to check if the value is already in table?
I have a script where it adds the name of player when it touches the part, but right now it keeps on adding multiple times(every bodypart that touches), and when i touch again it adds additional same person. To prevent that, i want to make a function where it checks if the value already exists so it wont spam the username in table.
Ex.
myTable = {}
local part = script.Parent
part.Touched:Connect(function(registeredTeleport)
if registeredTeleport.Parent:FindFirstChild("Humanoid") then
if registeredTeleport.Parent.Name --[already exists--] then
table.remove(myTable,registeredTeleport.Parent.Name(the one inside table))
elseif registeredTeleport.Parent.Name ~= --[already exist--] then
table.insert(myTable,registeredTeleport.Parent.Name)
end
end
end)
wait(10)
table.sort(myTable)
repeat
local temporaryName = myTable[1]:FindFindFirstChild("Head")
if temporaryName == ~~~~"Head" and temporaryName:FindFirstAncestorOfClass("Model") then
temporaryName.Cframe = Cframe.new(X,Y,Z)
end
table.remove(myTable,[1]
until
#myTable == 0
end
1 answer
There is two ways I can think of.
1. Linear Search
A linear search is a searching algorithm that searches for an element in a list.
lua
local function tableContains(tbl, element)
for _, v in ipairs(tbl) do
if (rawequal(v, element)) then
return true;
end
end
return false;
end
This function returns true if the table contains element, checking each element in tbl one by one.
2. Dictionaries
Table have an array part and a dictionary part. The dictionary part is an unordered mapping of keys to values.
It looks more or so like this:
lua
{
key = "value",
key2 = "value2"
-- and so on
}
So you can use the name of the player as the key, and use true as the value, just to show that they are in the table. Also duplicates will not be an issue.
lua
myTable[player.Name] = true
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