Error I cannot understand.

chat:120: attempt to index ? (a nil value)

file = fs.open("ProgramData/Chat/Username", "w")
file:write(newusername)			   -- This is line 120
file:close()

Pinkishu, on 07 October 2012 - 01:52 AM said:

Use file.write :3

Pinkishu, on 07 October 2012 - 01:58 AM said:

Does the directory exist?

Pinkishu, on 07 October 2012 - 02:10 AM said:

Seems it doesn't xD atleast it worked for me once I created it

Pinkishu, on 07 October 2012 - 02:59 AM said:

hmm strange, it fixed the error for me XD

chiloxsan, on 07 October 2012 - 03:28 AM said:

Try using io.open instead of fs.open.

/
|
+ - Folder1
...|
...+- Program
...+- ProgramData
....+- Chat
......+- Username

chiloxsan, on 07 October 2012 - 03:56 AM said:

Also, when using file paths in ComputerCraft programs, the path is not relative to where the program is being run, everything is based off the root directory.

So, for example I had a directory tree like this:

/
|
+ - Folder1
...|
...+- Program
...+- ProgramData
....+- Chat
......+- Username

If I ran my program in Folder1 and it tried to open "ProgramData/Chat/Username", it wouldn't open "Folder1/ProgramData/Chat/Username", it would open "/ProgramData/Chat/Username"

chat:150: attempt to call nil

-- BETA CONFIG


username = "Default"

WirelessModemSide = "left"  -- Define the side
-- your wireless modem is on

-- Available Sides: top, bottom, left, right,
-- front, back


-- END OF BETA CONFIG







line1 = " "
line2 = " "
line3 = " "
line4 = " "
line5 = " "
line6 = " "
line7 = " "
line8 = " "
line9 = " "
line10 = " "
line11 = " "
line12 = " "
line13 = " "
line14 = " "
line15 = " "
line16 = " "
line17 = " "

rednet.open(WirelessModemSide)
function receiver()
id, message = rednet.receive()
term.clear()
term.setCursorPos(1, 1)
line1 = line2
line2 = line3
line3 = line4
line4 = line5
line5 = line6
line6 = line7
line7 = line8
line8 = line9
line9 = line10
line10 = line11
line11 = line12
line12 = line13
line13 = line14
line14 = line15
line15 = line16
line16 = line17
line17 = message
print(line1)
print(line2)
print(line3)
print(line4)
print(line5)
print(line6)
print(line7)
print(line8)
print(line9)
print(line10)
print(line11)
print(line12)
print(line13)
print(line14)
print(line15)
print(line16)
print(line17)
end

function chat()
term.setCursorPos(1, 18)
write("> ")
chatmessageraw = read()
chatmessage = (username..": "..chatmessageraw)
rednet.broadcast(chatmessage)
line1 = line2
line2 = line3
line3 = line4
line4 = line5
line5 = line6
line6 = line7
line7 = line8
line8 = line9
line9 = line10
line10 = line11
line11 = line12
line12 = line13
line13 = line14
line14 = line15
line15 = line16
line16 = line17
line17 = chatmessage
print(line1)
print(line2)
print(line3)
print(line4)
print(line5)
print(line6)
print(line7)
print(line8)
print(line9)
print(line10)
print(line11)
print(line12)
print(line13)
print(line14)
print(line15)
print(line16)
print(line17)
end

term.clear()
term.setCursorPos(1, 1)
if fs.exists("ProgramData/Chat") == false then
print("-------------------------------------------------")
print("|			    Choose Username			    |")
print("-------------------------------------------------")
print("|											   |")
print("|											   |")
print("|											   |")
print("-------------------------------------------------")
term.setCursorPos(3, 5)
write("Username: ")
newusername = read()
term.clear()
term.setCursorPos(1, 2)
print("Writing..")
sleep(0.5)
fs.makeDir("ProgramData")
fs.makeDir("ProgramData/Chat")
file = fs.open("/ProgramData/Chat/Username", "w")
file:write(newusername)
file:close()
term.clear()
term.setCursorPos(1, 1)
end

file = fs.open("/ProgramData/Chat/Username", "r")
file = username
file:close()			  -- Line 150

while true do
parallel.waitForAny(receiver, chat)
end

file = username

username = file:readAll()

chiloxsan, on 07 October 2012 - 04:22 AM said:

On line 149, replace

file = username

with

username = file:readAll()

file:close()
--should actually be
file.close()
--and
file:readAll()
--should be
file.readAll()

luanub, on 07 October 2012 - 04:46 AM said:

The reason you are getting this error "chat:150: attempt to call nil" is your using the fs API but using :'s when using the functions. fs uses .'s and io uses :'s.

the command h:close() does not exist for the fs AP so it says your trying to call nil. the syntax for fs is h.close()

file:close()
--should actually be
file.close()
--and
file:readAll()
--should be
file.readAll()

local indentation = {}

function indentation.example()
	local correct = true
	if correct then
		for counter = 1, 10 do
			print('This is an example of "correct" indentation.')
		end
	end
end

indentation.example()

luanub, on 07 October 2012 - 04:53 AM said:

Not in the case of the fs api.

A good tutorial on using fs is here

Watcher7, on 07 October 2012 - 04:56 AM said:

Also, please learn to indent your code with atleast 2 spaces (4 spaces or 1 tab is more common) per block, otherwise people can't read large scripts you make and you might get lost in your own code (and get laughed at by less understanding programmers).

Example of indentation:

local indentation = {}

function indentation.example()
	local correct = true
	if correct then
		for counter = 1, 10 do
			print('This is an example of "correct" indentation.')
		end
	end
end

indentation.example()

brett122798, on 07 October 2012 - 04:58 AM said:

luanub, on 07 October 2012 - 04:53 AM said:

Not in the case of the fs api.

A good tutorial on using fs is here

Both ways work, that is currently not my problem atm. Look above. EDIT: Last Page


EDIT: Ninja'd

Watcher7, on 07 October 2012 - 04:56 AM said:

Also, please learn to indent your code with atleast 2 spaces (4 spaces or 1 tab is more common) per block, otherwise people can't read large scripts you make and you might get lost in your own code (and get laughed at by less understanding programmers).

Example of indentation:

local indentation = {}

function indentation.example()
	local correct = true
	if correct then
		for counter = 1, 10 do
			print('This is an example of "correct" indentation.')
		end
	end
end

indentation.example()

I know, my code looks horrible, but the reason I don't is cause I think it's wasting time.

Watcher7, on 07 October 2012 - 05:01 AM said:

Hitting the tab key isn't that hard.

sType = type(newusername)
print(sType)

brett122798, on 07 October 2012 - 05:05 AM said:

Watcher7, on 07 October 2012 - 05:01 AM said:

Hitting the tab key isn't that hard.

You cannot tab on CC computers, and half my code was done on one.

brett122798, on 07 October 2012 - 05:05 AM said:

Watcher7, on 07 October 2012 - 05:01 AM said:

Hitting the tab key isn't that hard.

You cannot tab on CC computers, and half my code was done on one.

chiloxsan, on 07 October 2012 - 05:09 AM said:

brett122798, on 07 October 2012 - 05:05 AM said:

Watcher7, on 07 October 2012 - 05:01 AM said:

Hitting the tab key isn't that hard.

You cannot tab on CC computers, and half my code was done on one.

If you are playing any version under 1.4 (such as the version that is included on Tekkit), the text editor does not tab. Any version above and when you hit tab the line is indented by 2 spaces.

luanub, on 07 October 2012 - 05:09 AM said:

Try using io.open() and the just file:read() and see what that does. Since your storing a single word string in the file it should properly read it.

Other things to check:
What do the contents of the file look like after the write?
You can also do something like this to check what the variable type is:

sType = type(newusername)
print(sType)

Do the same thing for username.
Also print them on the screen when they are being written or read so that you can see what it is doing. That should give you an idea as to what is going wrong.

Watcher7, on 07 October 2012 - 05:12 AM said:

brett122798, on 07 October 2012 - 05:05 AM said:

Watcher7, on 07 October 2012 - 05:01 AM said:

Hitting the tab key isn't that hard.

You cannot tab on CC computers, and half my code was done on one.

But CC is now able to pull from your clip-board, you should not be doing anything but quick edits in-game with edit. All your work should be done outside in your editor/IDE of choice and transfered over (or edited directly if the files are local).

Cloudy, on 07 October 2012 - 09:21 AM said:

I bet you're one of those kind of people who complain if updates don't happen and also if they do.

I'm curious, what makes 1.3.2 a horrible update?

Cloudy, on 07 October 2012 - 10:16 AM said:

1.3 was a necessary rewrite to allow the modding API. Well worth it in the long run. I'm from alpha too - but I like the changes - I guess that's where we differ - but I'm off topic - bad Cloudy!