ComputerCraft cant access data in tables

Question

I want to try and compare the two variables capacity and amount but I have no clue as to how to access the data. I will include screenshots from in-game. Here is the code:

t=peripheral.wrap("left")
local infoTable = t.getTankInfo("west")
print(infoTable.capacity)

The function returns the following.

{
 {
  capacity = 16000,
  contents = {
    id = 0;
    amount = 0,
  },
 },
}

EDIT: I got it. Its a table of tables. so to access it.

infoTable[1].capacity

and for the cotents table

infoTable[1].contents.amount

http://puu.sh/gtzX9/acc0839b11.jpg
http://puu.sh/gtzZW/6b2aa52f12.jpg

Also, please include the code in the question, and not as an off-site link. — Colonel Thirty Two, Mar 09 '15 at 21:57

score 1 · Answer 1 · answered Mar 09 '15 at 21:56

1

foo[bar] takes whatever is in the variable bar and uses it to index foo. Since in your example, variable capacity doesn't exist, it's value is nil.

You want infoTable.capacity, which is the same as infoTable["capacity"]

answered Mar 09 '15 at 21:56

Colonel Thirty Two

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I just tried infoTable.capacity, The program just prints a empty line. – theindiandood Mar 10 '15 at 01:45
@theindiandood Make sure the table actually has a `capacity` field. Do `for k,v in pairs(infoTable) do print(k, " ", v) end`. – Colonel Thirty Two Mar 10 '15 at 12:09

ComputerCraft cant access data in tables

1 Answers1