8 replies to this topic

[digpoe]

I have this program for making my RedPower frame quarry work - and I used ComputerCraft since Lua is a LOT easier than Forth - but I got the error in the title. Can anyone help me? Here's the script:

I forgot how you do the code thingy - the button didn't like me.

function usage()
print 'Usage:'
print 'bore 10  -  bores a hole 10 blocks deep'
print 'type bore followed by a number to bore a hole'
end
tArgs = { ... }
if #tArgs == 1 then
if tonumber(tArgs[1]) then
  digHeight = tArgs[1]
  boreDown()
else
  usage()
end
else
usage()
end
function boreDown()
while ( digHeight =~ 0 ) do
  redstone.SetBundledOutput('back', 1)
  sleep(0.800)
  redstone.SetBundledOutput('back', 2)
  sleep(0.800)
  redstone.setBundledOutput('back', 4)
  sleep(0.800)
  digHeight = (digHeight - 1)
end
print 'Completed tunnel boring'
end

Wait. First error I noticed: it's redstone.setBundledOutput, not redstone.SetBundledOutput...

[Lettuce]

Remove the perenthesis on your while statement. You don't need parenthesis there. And I agree, Lua is easier to use AND more widespread than FORTH.

[digpoe]

Lettuce, on 08 September 2012 - 04:45 PM, said:

Remove the perenthesis on your while statement. You don't need parenthesis there. And I agree, Lua is easier to use AND more widespread than FORTH.

I tried that and now i'm getting the error expecting a do in the same line

[Lettuce]

Is there a 'do' on that line?

[digpoe]

Lettuce, on 08 September 2012 - 04:49 PM, said:

Is there a 'do' on that line?

I meant -

function usage()
print 'Usage:'
print 'bore 10  -  bores a hole 10 blocks deep'
print 'type bore followed by a number to bore a hole'
end
tArgs = { ... }
if #tArgs == 1 then
if tonumber(tArgs[1]) then
  digHeight = tArgs[1]
  boreDown()
else
  usage()
end
else
usage()
end
function boreDown()
while digHeight =~ 0 do --Here it is expecting the do
  redstone.setBundledOutput('back', 1)
  sleep(0.800)
  redstone.setBundledOutput('back', 2)
  sleep(0.800)
  redstone.setBundledOutput('back', 4)
  sleep(0.800)
  digHeight = (digHeight - 1)
end
print 'Completed tunnel boring'
end

[Kingdaro]

Your inequality sign is backwards.

while digHeight =~ 0 do

should be

while digHeight ~= 0 do

[digpoe]

Kingdaro, on 08 September 2012 - 04:53 PM, said:

Your inequality sign is backwards.

while digHeight =~ 0 do

should be

while digHeight ~= 0 do

Ah. Thanks. I actually forgot howto do the inequality signs since i haven't used Lua for a long time.
>.< Now it's erroring that :
bore:10: attempt to call nil
which is where the function to start tunnel boring is.. it's saying the function is nonexistant? Oh wait. I can guess why. The function needs to be at the start?

Edited by digpoe, 08 September 2012 - 04:56 PM.

[Kingdaro]

I used to make the mistake all the time too. When I use them, I usually think "is almost equal to" since that's what I was taught the symbol meant before I knew about lua.

"is almost (~) equal (=) to" helped me distinguish the order.

Hope this helps in the future />

You could always replace "almost" with "not" to make things less confusing though, that's just my backwards logic, haha.

[cant_delete_account]

Here ya go:

tArgs = { ... }
function usage()
print 'Usage:'
print 'bore 10  -  bores a hole 10 blocks deep'
print 'type bore followed by a number to bore a hole'
end
function boreDown()
while digHeight ~= 0 do
  redstone.setBundledOutput('back', 1)
  sleep(0.800)
  redstone.setBundledOutput('back', 2)
  sleep(0.800)
  redstone.setBundledOutput('back', 4)
  sleep(0.800)
  digHeight = digHeight-1
end
print 'Completed tunnel boring'
end
if #tArgs == 1 then
if tonumber(tArgs[1]) then
  digHeight = tonumber(tArgs[1])
  boreDown()
else
  usage()
end
else
usage()
end