Api Help - ComputerCraft Forums (archive)

DarkNinja2462 #1

DarkNinja2462's profile picture

102 posts

Location The 4th Dimension

Posted 24 February 2012 - 01:08 AM

I made an api to add some extra turtle functions. I also made a program to run it.
Currently the only function is to see if the turtle's inventory is full.
I got the error:


isFull:3: attempt to index ? (a nil value)

The program isFull:


os.loadAPI("turtle2")
state = turtle2.isFull()
print(state)

The API turtle2:


if not turtle then
error( "Cannot load turtle API on computer" )
end
function isFull()
if turtle.getItemCount(1) == 64 and turtle.getItemCount(2) == 64 and turtle.getItemCount(3) == 64 and turtle.getItemCount(4) == 64 and turtle.getItemCount(5) == 64 and turtle.getItemCount(6) == 64 and turtle.getItemCount(7) == 64 and turtle.getItemCount(8) == 64 and turtle.getItemCount(9) == 64 then
return true
else
return false
end
end

I followed the API tutorial to the letter.
Plz tell me whats wrong?

FuzzyPurp #2

496 posts

Location Harlem, NY

Posted 24 February 2012 - 01:26 AM

Program


os.loadAPI("turtle2")
print(state)

API


if not turtle then
error( "Cannot load turtle API on computer" )
end
function isFull()
if turtle.getItemCount(1) == 64 and turtle.getItemCount(2) == 64 and turtle.getItemCount(3) == 64 and turtle.getItemCount(4) == 64 and turtle.getItemCount(5) == 64 and turtle.getItemCount(6) == 64 and turtle.getItemCount(7) == 64 and turtle.getItemCount(8) == 64 and turtle.getItemCount(9) == 64 then
state = true
else
state = false
end
end

DarkNinja2462 #3

DarkNinja2462's profile picture

102 posts

Location The 4th Dimension

Posted 24 February 2012 - 01:27 AM

no, I typed turtle2.isFull()
Function isFull s defined in turtle2

FuzzyPurp #4

496 posts

Location Harlem, NY

Posted 24 February 2012 - 01:34 AM

DarkNinja2462, on 24 February 2012 - 01:27 AM said:
no, I typed turtle2.isFull()
Function isFull s defined in turtle2

Edited my post - try that, otherwise wait for a lua pro shark - shouldnt be long. They haven't ate much today.

DarkNinja2462 #5

DarkNinja2462's profile picture

102 posts

Location The 4th Dimension

Posted 24 February 2012 - 01:42 AM

Where do I place the API file?
/rom/??
/rom/apis/??
/rom/programs/??

DarkNinja2462 #6

DarkNinja2462's profile picture

102 posts

Location The 4th Dimension

Posted 24 February 2012 - 01:45 AM

And I did what you said above except in the program I added the turtle2.isFull().
So now my program looks like:


if not turtle then
error( "Cannot load turtle API on computer" )
end
function isFull()
if turtle.getItemCount(1) == 64 and turtle.getItemCount(2) == 64 and turtle.getItemCount(3) == 64 and turtle.getItemCount(4) == 64 and turtle.getItemCount(5) == 64 and turtle.getItemCount(6) == 64 and turtle.getItemCount(7) == 64 and turtle.getItemCount(8) == 64 and turtle.getItemCount(9) == 64 then
  state = true
else
  state = false
end
end

And the program is now:


os.loadAPI("turtle2")
turtle2.isFull()
print(state)

FuzzyPurp #7

496 posts

Location Harlem, NY

Posted 24 February 2012 - 02:14 AM

DarkNinja2462, on 24 February 2012 - 01:42 AM said:
Where do I place the API file?
/rom/??
/rom/apis/??
/rom/programs/??

to think of it that might have been your original problem too. put the api in /rom/apis folder and it gets loaded auto with craftOS apis. and you would call its functions like so: turtle2.isFull()

if you put the api in programs folder for instance then
os.loadAPI("rom/programs/turtle2")

Xtansia #8

496 posts

Location New Zealand

Posted 24 February 2012 - 03:09 AM

DarkNinja2462, on 24 February 2012 - 01:45 AM said:

And I did what you said above except in the program I added the turtle2.isFull().
So now my program looks like:


if not turtle then
error( "Cannot load turtle API on computer" )
end
function isFull()
if turtle.getItemCount(1) == 64 and turtle.getItemCount(2) == 64 and turtle.getItemCount(3) == 64 and turtle.getItemCount(4) == 64 and turtle.getItemCount(5) == 64 and turtle.getItemCount(6) == 64 and turtle.getItemCount(7) == 64 and turtle.getItemCount(8) == 64 and turtle.getItemCount(9) == 64 then
  state = true
else
  state = false
end
end

And the program is now:


os.loadAPI("turtle2")
turtle2.isFull()
print(state)

API:


if not turtle then
    error( "Cannot load turtle API on computer" )
end
function isFull()
local state
if turtle.getItemCount(1) == 64 and turtle.getItemCount(2) == 64 and turtle.getItemCount(3) == 64 and turtle.getItemCount(4) == 64 and turtle.getItemCount(5) == 64 and turtle.getItemCount(6) == 64 and turtle.getItemCount(7) == 64 and turtle.getItemCount(8) == 64 and turtle.getItemCount(9) == 64 then
     state = true
else
     state = false
end
return state
end

Program:


os.loadAPI("turtle2")
local state = turtle2.isFull()
print(state)

Advert #9

Advert's profile picture

454 posts

Location London

Posted 24 February 2012 - 04:11 AM

DarkNinja2462, on 24 February 2012 - 01:08 AM said:
I made an api to add some extra turtle functions. I also made a program to run it.
Currently the only function is to see if the turtle's inventory is full.
I got the error:
isFull:3: attempt to index ? (a nil value)
The program isFull:
os.loadAPI("turtle2")
state = turtle2.isFull()
print(state)
The API turtle2:
if not turtle then
error( "Cannot load turtle API on computer" )
end
function isFull()
if turtle.getItemCount(1) == 64 and turtle.getItemCount(2) == 64 and turtle.getItemCount(3) == 64 and turtle.getItemCount(4) == 64 and turtle.getItemCount(5) == 64 and turtle.getItemCount(6) == 64 and turtle.getItemCount(7) == 64 and turtle.getItemCount(8) == 64 and turtle.getItemCount(9) == 64 then
return true
else
return false
end
end
I followed the API tutorial to the letter.
Plz tell me whats wrong?

After some experimentation, I think what's wrong is that you tried loading turtle2, but it errored (possibly when you were making the program); then you fixed the error, but since in the turtle, the API is still "being loaded", and when you call os.loadAPI again, it sees that the API is already being loaded, and doesn't do anything; hence turtle2 is nil.
Rebooting the turtle should fix this, as I can't see anything wrong with your code.

Here's what I used to test:


-- Testing code
os.loadAPI("turtle2")
print(turtle2.isFull())

turtle2


if not turtle then
 error("NAT")
end

function isFull()
 for i = 1, 9 do
  if turtle.getItemCount(i) ~= 64 then
   return false
  end
 end
 return true
end

FuzzyPurp #10

496 posts

Location Harlem, NY

Posted 24 February 2012 - 05:18 AM

^ I told you the sharks are circling ^

DarkNinja2462 #11

DarkNinja2462's profile picture

102 posts

Location The 4th Dimension

Posted 24 February 2012 - 04:15 PM

I did Exactly as you said but I put turtle2 in /rom/apis/turtle/
So my isFull is here:

Spoiler


os.loadAPI("rom/apis/turtle/turtle2")
print(turtle2.isFull())

My API

Spoiler


if not turtle then
error( "Cannot load turtle API on computer" )
end
function isFull()
for i = 1, 9 do
  if turtle.getItemCount(i) -= 64 then
   return false
  end
end
return true
end

[

The ERROR:

Spoiler


bios:206: [string "turtle2"]:7:
unexpected symbol
TurtleOS 1.3
> isFull
API turtle2 is already being loaded
isFull:2: attempt to index ? (a nil value)

Is something wrong with my bios.lua?

Advert #12

Advert's profile picture

454 posts

Location London

Posted 24 February 2012 - 04:18 PM

DarkNinja2462, on 24 February 2012 - 04:15 PM said:
I did Exactly as you said but I put turtle2 in /rom/apis/turtle/
So my isFull is here:
Spoiler
os.loadAPI("rom/apis/turtle/turtle2")
print(turtle2.isFull())
My API
Spoiler
if not turtle then
error( "Cannot load turtle API on computer" )
end
function isFull()
for i = 1, 9 do
  if turtle.getItemCount(i) -= 64 then
   return false
  end
end
return true
end
[
The ERROR:
Spoiler
bios:206: [string "turtle2"]:7:
unexpected symbol
TurtleOS 1.3
> isFull
API turtle2 is already being loaded
isFull:2: attempt to index ? (a nil value)
Is something wrong with my bios.lua?

You need to replace -= with ~=
and reboot your computercraft computer, since the API is already being loaded.

In addition, if you put your api in rom/apis, you don't have to os.loadAPI it.

BouncyWolf102 #13

BouncyWolf102's profile picture

4 posts

Posted 03 March 2012 - 01:46 PM

hi im new to lua and turtles but is there a way to check if the slots are taken up like with any amount not just 64?

Espen #14

715 posts

Posted 03 March 2012 - 01:55 PM

BouncyWolf102, on 03 March 2012 - 01:46 PM said:
hi im new to lua and turtles but is there a way to check if the slots are taken up like with any amount not just 64?

turtle.getItemCount(SLOTNUMBER) returns the amount of items in slot SLOTNUMBER.
turtle.getItemSpace(SLOTNUMBER) returns how much space is left in slot SLOTNUMBER. Essentially it's the 64 minus the former.^^

MCGamer20000 #15

MCGamer20000's profile picture

45 posts

Posted 08 June 2013 - 05:05 PM

This needs changed. First of all, some items, like the snowball, doesn't have 64 as a full stack. You could only stack 16 snowballs in one place. Also, in ComputerCraft 1.4, the turtle inventory size was changed to 16. A solution for these is:

if not turtle then
error( "Cannot load turtle API on computer" )
end
function isFull()
for i = 1, 16 do
if turtle.getItemSpace(i) ~= 0 then
return false
end
end
return true
end

H4X0RZ #16

H4X0RZ's profile picture

1583 posts

Location Germany

Posted 08 June 2013 - 06:15 PM

@OP
(I think) you can't print out a boolean!

Improvement:
The api


if not turtle then error("some error message",2) end

function isFull()
local fullSlots = 0
for i = 1,16 do
if turtle.getItemCount(i) == 64 then fullSlots = fullSlots + 1 end
if fullSlots == 16 then return true else return false end
end

The program


os.loadAPI("turtle2")
if turtle2.isFull() then
print("The turtle's inventory is full!")
else
print("The turtle's inventory isn't full!")
end

billysback #17

536 posts

Posted 08 June 2013 - 09:10 PM

ummm…
what the hell?
double necro?
February 2012 -> March 2012 -> yesterday!?

also, freack I'm pretty sure you can print a boolean, try


print("boolean: "..tostring(false))

Ninjawolf0007 #18

Ninjawolf0007's profile picture

46 posts

Posted 27 July 2013 - 10:03 PM

I'm having an issue… I'm trying to load my api from a resource pack and in

 os.loadAPI(" *path goes here* ")

I don't know what I should write for the path because if I write

os.loadAPI("rom/apis/t")

I get a "File not found" error… I have the api in a resource pack, but I don't know how to use it or load it from the resource pack. Could anyone help me?

Spoiler

My API… very few things I know, but could someone help?



print("API Loaded. Place fuel in slot 16 if fuel is required.")

function printMessage(message)
   print(message)
end

function Fuel()
  if turtle.getFuelLevel() < 20 then
    turtle.select(16)
    turtle.refuel(1)
  end
end

function fd()
  Fuel()
  turtle.forward()
end

function bk()
  Fuel()
  turtle.back()
end

function up()
  Fuel()
  turtle.up()
end

function dn()
  Fuel()
  turtle.down()
end

function lt()
  turtle.turnLeft()
end

function rt()
  turtle.turnRight()
end

TheOddByte #19

1852 posts

Location Sweden

Posted 28 July 2013 - 04:20 PM

billysback, on 08 June 2013 - 09:10 PM said:
ummm…
what the hell?
double necro?
February 2012 -> March 2012 -> yesterday!?

also, freack I'm pretty sure you can print a boolean, try
print("boolean: "..tostring(false))

Yes you can print a boolean value, But you can't write 'em…
Also why did ya all necro this post?!? D:
(I know I also kinda did that right now.. .-.)

TheOddByte #20

1852 posts

Location Sweden

Posted 28 July 2013 - 04:24 PM

Ninjawolf0007, on 27 July 2013 - 10:03 PM said:
I'm having an issue… I'm trying to load my api from a resource pack and in
 os.loadAPI(" *path goes here* ")
I don't know what I should write for the path because if I write
os.loadAPI("rom/apis/t")
I get a "File not found" error… I have the api in a resource pack, but I don't know how to use it or load it from the resource pack. Could anyone help me?
Spoiler
My API… very few things I know, but could someone help?
print("API Loaded. Place fuel in slot 16 if fuel is required.")

function printMessage(message)
   print(message)
end

function Fuel()
  if turtle.getFuelLevel() < 20 then
    turtle.select(16)
    turtle.refuel(1)
  end
end

function fd()
  Fuel()
  turtle.forward()
end

function bk()
  Fuel()
  turtle.back()
end

function up()
  Fuel()
  turtle.up()
end

function dn()
  Fuel()
  turtle.down()
end

function lt()
  turtle.turnLeft()
end

function rt()
  turtle.turnRight()
end

Are you sure it's in the rom/apis folder? .-.
Or do you just have it on the computer?
If you do you could just do


os.loadAPI("Api Name Here")

But i'm not sure since I haven't installed the new CC version and I'm not sure how the resource packs work etc.

EDIT: Btw.. I think if you have it in the apis folder it should load automatically :)/>

Ninjawolf0007 #21

Ninjawolf0007's profile picture

46 posts

Posted 28 July 2013 - 08:20 PM

Hellkid98, on 28 July 2013 - 04:24 PM said:
Ninjawolf0007, on 27 July 2013 - 10:03 PM said:
I'm having an issue… I'm trying to load my api from a resource pack and in
 os.loadAPI(" *path goes here* ")
I don't know what I should write for the path because if I write
os.loadAPI("rom/apis/t")
I get a "File not found" error… I have the api in a resource pack, but I don't know how to use it or load it from the resource pack. Could anyone help me?
Spoiler
My API… very few things I know, but could someone help?
print("API Loaded. Place fuel in slot 16 if fuel is required.")

function printMessage(message)
   print(message)
end

function Fuel()
  if turtle.getFuelLevel() < 20 then
	turtle.select(16)
	turtle.refuel(1)
  end
end

function fd()
  Fuel()
  turtle.forward()
end

function bk()
  Fuel()
  turtle.back()
end

function up()
  Fuel()
  turtle.up()
end

function dn()
  Fuel()
  turtle.down()
end

function lt()
  turtle.turnLeft()
end

function rt()
  turtle.turnRight()
end
Are you sure it's in the rom/apis folder? .-.
Or do you just have it on the computer?
If you do you could just do
os.loadAPI("Api Name Here")
But i'm not sure since I haven't installed the new CC version and I'm not sure how the resource packs work etc.

EDIT: Btw.. I think if you have it in the apis folder it should load automatically :)/>

Yea, I put it in resourcepacks/ComputerCraftCode/assets/computercraft/lua/rom/apis… It's just not always loading :/ *sigh* I'll figure it out eventually and post here once I get it…

Edit: I got it after I unzipped my resource pack with my api and then re-zipped it… hmm… I wonder if I can have a resource pack that isn't zipped for computercraft… I doubt it…

Ninjawolf0007 #22

Ninjawolf0007's profile picture

46 posts

Posted 28 July 2013 - 08:59 PM

You can't have a non-zipped resourcepack for Computercraft :(/>