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Nil data for a module script?

Asked by
iRexBot 147
7 years ago 
local Core = require(game.Workspace.Music.Core)

while true do
    script.Parent.MusicPlayer.Song.Value = math.random(1, 13)
    wait(st)
    wait(0.1)
    print(script.Parent.MusicPlayer.Song.Value)
    if script.Parent.MusicPlayer.Song.Value == 0 then
        wait(4)
        st = 206.513
        script.Parent.Sound.SoundId = "rbxassetid://419901901"
        game.Workspace.Music.MusicName.Value = "Alan Walker - Faded (Sep Remix)"
        Core.Change()
        script.Parent.Sound:Play()
        wait(119.98)
        script.Parent.Sound.SoundId = "rbxassetid://419901917"
        script.Parent.Sound:Play()
    end 
end

Module Script named Core:

local Core = {}

function Change()
    game.Workspace.Music.MainText.Value = game.Workspace.Music.MusicName.Value
end

return Core

Why won't this script work it keeps on saying Nil Value on Core.Change()

1 answer

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Answered by
Link150 1355 Badge of Merit Moderation Voter
7 years ago

This is because you didn't add Change to Core. You defined it as a global variable. You want to insert it into your Core table, otherwise there is no way for the script require()ing the module to retrieve your function back.

There are multiple ways to do this, the best in your case is probably:

function Core.Change()
    -- ...
end

This has the advantage to be easily readable. In the context of a module, anyway.

Another way is to insert them into your table literal:

local Core = {
    ["Change"] = function()
        -- ...
    end,

    -- Or, without square brackets:
    Change = function()
            -- ...
    end
}

but it's not as easily readable.

You could also insert them afterwards:

local Core = {}

local function Change()
    -- ...
end


Core["Change"] = Change

-- Or, without square brackets:
Core.Change = Change
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