I was loosely following a hotbar tutorial while trying to understand what they are doing. this video by Shiroo
I don’t understand what is happening when they write
inputOrder[i]["tool"]
I’ve replicated it by making a dictionary and an array that orders the keys just like in the video.
local slots = {
["SlotOne"] = "empty",
["SlotTwo"] = "empty",
["SlotThree"] = "empty",
["SlotFour"] = "empty",
["SlotFive"] = "empty",
["SlotSix"] = "empty",
["SlotSeven"] = "empty",
["SlotEight"] = "empty"
}
local slotOrder = {
slots["SlotOne"],slots["SlotTwo"],slots["SlotThree"],slots["SlotFour"],slots["SlotFive"],slots["SlotSix"],slots["SlotSeven"],slots["SlotEight"]
}
local function onAdded(added)
for i=1, #slotOrder do
print(slotOrder[i]["hi"])
end
print(slotOrder)
end
player.Backpack.ChildAdded:Connect(onAdded)
I understand that the “i” in “slotOrder[i][“hi”]” stands for whatever number the for loop is on. What I don’t understand is what the second brackets are doing. No matter what is put in there it will return nil.
I would like to know what the second bracket is for, which I haven’t found anything about on the documents. I’d also like to know how it is used in making a custom hotbar (Which I am trying to do). Thank you!
What you’re seeing is multi-dimensional indexing, which is born from multi-dimensional tables. Tables can contain tables, and to index the content within those contained tables, you must index them from the containing table:
local containing = {
{"A", "B", "C"},
{"D", "E", "F"},
}
print(containing[1][1]) --> A
print(containing[2][1]) --> D
The example makes containing a 2-dimensional table. I see no 2D tables in the code you provided, so it’s clear why a second index operation will not result in any value. You may have yet to complete the tutorial or made a mistake copying the code
Of course it won’t output anything. Because you didn’t put any value in ["hi"]. I saw the video which you provided and the code was inputOrder[i]["tool"] = adding.
just to note: this wouldn’t work in his example because “empty” isn’t a table.
slotOrder[i][“hi”] would be nil;
and if you try to add a value to “empty” (slotOrder[i][“hi”] = 123) you should get an error “attempt to index string with ‘hello’”
Roblox scripting tutorials are beyond unorganized. It’s highly likely the YouTuber intended for a different design while failing to adhere to it early on. It will be remedied at some point in the video
