Trying to read dictionary. getting error attempt to index nil with nil

[KRYPTIC010]

You can write your topic however you want, but you need to answer these questions:

1. What do you want to achieve? Keep it simple and clear!
   how to ready this dictionary
2. What is the issue? Include screenshots / videos if possible!
   error report on line of reading dictionary. i have read dictionaries before don’t know why this is not working

local resourceN = _G.BuildingInfo[season][build]["Resource"] -- error on this line
-- the dictionary
_G.BuildingInfo = {
	Basic = {
		House = {
			Name = "House",
			Health = 100,
			Cost = 50,000,
			Resource = "BasicCoin"
		}
	}
}

[SeargentAUS (Seargent)]

I’m going to assume that the variables season and build are both nil at that point in the script. I would suggest you look to try and identify why they are nil

[Ziffixture (Ziffix)]

You should not be using _G. Unless your codebase follows SSA (single script architecture) or any other architecture that invites a single entry-point, the order of execution of the scripts in your codebase is not guaranteed. The script you’re accessing this extension of _G from is likely executing before the script you’ve presented to us, leaving that extension of _G non-existent. This is one of the flaws of _G that is only solved by a major and imposing structural change to your codebase. Furthermore, _G’s contents cannot be known as the table can be written to from anywhere throughout the codebase. This leads to further race conditions and absent type annotations (auto-completion). You should be using a ModuleScript to implement globally accessible content for your codebase

Additionally, the following is a syntax error in your code. Should your script end up running before those that access _G, this will cause your extension of _G to fail to be completed as an error will be raised:

Cost = 50,000,

If your goal was to improve clarity, you can use the following formatting:

-- Legal syntax; do not be alarmed by absent syntax highlighting.
Cost = 50_000

[KRYPTIC010]

there in a module script now same error. also before the line runs in the old code it runs a dictionary search for a _G. , Do you have any other ideas what wrong?

local GameInfo = {}

BuildingInfo = {
	Basic = {
		House = {
			Name = "House",
			Health = 100,
			Cost = 50000,
			Resource = "BasicCoin"
		}
	}
}

function GameInfo.getResource(s, b)
	v = BuildingInfo[s][b]["Resource"]
	return v
end

return GameInfo

[KRYPTIC010]

i am using function with the variables caried like function(season, build)

[SeargentAUS (Seargent)]

at some point in your function, you are calling the function without the required parameters, or are trying to pass a value that is nil into the function

[EmilyBendsSpace]

@KRYPTIC010

local GameInfo = {}

BuildingInfo = {
	Basic = {
		House = {
			Name = "House",
			Health = 100,
			Cost = 50000,
			Resource = "BasicCoin"
		}
	}
}

function GameInfo.getResource(s, b)
	v = BuildingInfo[s][b]["Resource"]
	return v
end

return GameInfo

This code is functional. I just copy-pasted it into a ModuleScript named GameInfo, and parented it to a Script that calls it like so:

local gameInfo = require(script:FindFirstChild("GameInfo"))
print( gameInfo.getResource("Basic","House"))

It prints:

  16:39:48.774  BasicCoin  -  Server - Script:3

Your problem must be that your calling code is calling the function with a key that is not in your dictionary. Set a breakpoint where the function is called, or just print the arguments being passed into it to see what’s wrong.

[KRYPTIC010]

You were right i found it. i must have error some where while editing. i had two variables in the function when i was supposed to be reading 4 variables.

[KRYPTIC010]

Now i have a function building placement system that goes through a purchase process. congrats to me. (placement of building was working before, the errors where in the purchase part). thanks for the help