Dictionary Key exist check return error

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#1

Hello, i’m currently making a datatype documentation compiler and in order to make it work i need to check if a key already exist to not accidently overwrite the old one.

The issue is, when i try to check if the key exist using a path with has more than 1 key in it
EX : Result[Name][ConInput[v]][CName]
Where Result is the compiled dictionary. Name is the datatype name. ConInput[v] is the object(Property, Constructor, Function…) category and the CName is the name of the object.
It returns : attempt to index nil with ‘new’ *new is the object name

I tried searching this error but the one that i found with the key error was due to it been a datastore.

local Input = [[
BrickColor
Constructors
BrickColor.new ( number : Numerical Index )
Constructs a BrickColor from its numerical index.
Properties
number BrickColor.Number
The unique number that identifies the BrickColor.
]]

local SectionList = {["Constructors"] = true;["Properties"] = true;["Functions"] = true;["Math Operations"] = true}

function ConvertV2(Input)
	local ConInput = string.split(Input, "\n")
	local Name = ConInput[1]
	local Result = {[Name] = {}}
	local Sections = {}
	
	for i, v in pairs(ConInput) do
		if SectionList[v] then
			table.insert(Sections, #Sections + 1, i)
			table.insert(Result[Name], #Sections + 1, i)
		end
	end
	
	print(Sections)
	
	for i, v in pairs(Sections) do
		if ConInput[v] == "Constructors" then
			for ie, e in pairs(ConInput) do
				if ie > v and ie < Sections[i + 1] then
					local CName = string.split(e, " ")[1]
					CName = string.gsub(CName, Name..".", "")
					local CDesc = ConInput[ie + 1]
					local Arguments = string.match(e, "%b()")
					Arguments = string.gsub(Arguments, ".", {["("]="", [")"]=""})
					Arguments = string.split(Arguments, ",")
					print(Arguments)
					if not Result[Name][ConInput[v]][CName] then
						Result[Name][ConInput[v]][CName] = {{}, {}, {CDesc}}
					else
						table.insert(Result[Name][ConInput[v]][CName][3], #Result[Name][ConInput[v]][CName][3] + 1, CDesc)
					end
					
					for ai, a in pairs(Arguments) do
						local Split = string.split(a, ":")
						print(Split)
						for aai, aa in pairs(Split) do
							if aa == "" then
								table.remove(Split, aai)
							end
						end
						table.insert(Result[Name][ConInput[v]][CName][1], #Result[Name][ConInput[v]][CName][1] + 1, Split[1])
						table.insert(Result[Name][ConInput[v]][CName][2], #Result[Name][ConInput[v]][CName][2] + 1, Split[2])
						print(Split[1].." : "..Split[2])
					end
					print(Result)
				end
			end
		end
	end
end

ConvertV2(Input)
```The code is pretty messy but it is not even totaly working yet so im not at he stage of optimising everything
#2

You can just check if the value retrieved from the table indexing is that of the expected type, so for example if a table value is expected all you need to do is.

if type(result) == "table" then
	--perform actions here after value type has been checked
end
#3

Is result the path? If it is then i tried doing that but it didn’t work :
if type(Result[Name][ConInput[v]][CName]) == "table" then

#4

The error was due to the second key not existing so the game did not undertand with im indexing a key on nil