295 posts
Posted 02 August 2013 - 11:48 AM
Hi,
I have a system that essentially is this:
while true do
print("Example code")
wait(2)
exit
I want it so I can type in "stop" and it will exit that loop.That or I press any key to exit the loop.
I am new to lua and Computercraft so help is much appreciated.
1190 posts
Location
RHIT
Posted 02 August 2013 - 12:00 PM
Hello adencraft,
There are a few ways that you can exit from a loop. The first one is to have the loop check a condition every time it runs.
Example:
local shouldStop = false
while not shouldStop do
print("Not stopping yet!")
local event, keyCode = os.pullEvent("key")
if keyCode == keys.space then
shouldStop = true
end
end
In the above example, the program will continue writing "Not stopping yet!" until you hit the correct key (in this case the spacebar).
Another way to exit a loop is to use the break statement.
Example:
local sleepTime = 0
while true do
print("Not stopping yet!")
sleep(1)
sleepTime = sleepTime + 1
if sleepTime > 5 then
break
end
end
If you want to get more familiar with how loops, I would suggest checking out the
Programming in Lua online manual. It's very handy and every Lua programmer should read it to get the basics of Lua.
295 posts
Posted 02 August 2013 - 12:07 PM
Thanks
295 posts
Posted 02 August 2013 - 12:39 PM
Off topic:
This is being printed to my MINECRAFT console log NOT the computer
2013-08-03 02:38:01 [INFO] [STDOUT] ComputerCraft: Error running task.
2013-08-03 02:38:01 [INFO] [STDERR] java.lang.NoClassDefFoundError: dan200/computer/core/IMountedFileNormal
2013-08-03 02:38:01 [INFO] [STDERR] at dan200.computer.core.FileSystem.<init>(FileSystem.java:25)
2013-08-03 02:38:01 [INFO] [STDERR] at dan200.computer.core.Computer.initFileSystem(Computer.java:626)
2013-08-03 02:38:01 [INFO] [STDERR] at dan200.computer.core.Computer.access$1000(Computer.java:33)
2013-08-03 02:38:01 [INFO] [STDERR] at dan200.computer.core.Computer$1.execute(Computer.java:865)
2013-08-03 02:38:01 [INFO] [STDERR] at dan200.computer.core.ComputerThread$1$1.run(ComputerThread.java:117)
2013-08-03 02:38:01 [INFO] [STDERR] at java.lang.Thread.run(Thread.java:680)
2013-08-03 02:38:01 [INFO] [STDERR] Caused by: java.lang.ClassNotFoundException: dan200.computer.core.IMountedFileNormal
2013-08-03 02:38:01 [INFO] [STDERR] at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:139)
2013-08-03 02:38:01 [INFO] [STDERR] at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
2013-08-03 02:38:01 [INFO] [STDERR] at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
2013-08-03 02:38:01 [INFO] [STDERR] ... 6 more
Any idea what the problem is (probably more for a java dev but idk.)EDIT:
Fixed
Edited on 02 August 2013 - 11:16 AM
1029 posts
Location
Missouri, United States, America, Earth, Solar System, Milky Way, Universe 42B, Life Street, Multiverse, 4th Dimension
Posted 02 August 2013 - 12:56 PM
It would be best you make another topic for the above. Idk where it would go, just look around the forums.
295 posts
Posted 02 August 2013 - 01:15 PM
Okay so I used example 1 and it would not loop, Code can be found here:
http://pastebin.com/8CAkZYG9
1190 posts
Location
RHIT
Posted 02 August 2013 - 02:05 PM
Okay so I used example 1 and it would not loop, Code can be found here:
http://pastebin.com/8CAkZYG9
How exactly do you want this to behave? The code is valid and should have the turtle do the thing endlessly - however, you have to hit a key every time you want the turtle to do something. If you want to the turtle to just continuously do something until you hit a key, you will need to use the parallel API or coroutines. These are somewhat more advanced topics, but if you'd like I can go into more detail.
Another alternative is to have the turtle just do something a certain number of times. For this we would use a for loop.
Example:
for i=1,5 do
turtle.dig()
turtle.forward()
turtle.digUp()
end
295 posts
Posted 02 August 2013 - 04:03 PM
Okay so I used example 1 and it would not loop, Code can be found here:
http://pastebin.com/8CAkZYG9
How exactly do you want this to behave? The code is valid and should have the turtle do the thing endlessly - however, you have to hit a key every time you want the turtle to do something. If you want to the turtle to just continuously do something until you hit a key, you will need to use the parallel API or coroutines. These are somewhat more advanced topics, but if you'd like I can go into more detail.
Another alternative is to have the turtle just do something a certain number of times. For this we would use a for loop.
Example:
for i=1,5 do
turtle.dig()
turtle.forward()
turtle.digUp()
end
So would this work?
for i=1,5 do
turtle.dig()
turtle.forward()
turtle.digUp()
end
local event, keyCode = os.pullEvent("key")
if keyCode == keys.space then
print("Stopping")
sleep(2)
exit()
end
EDIT:
So could you make the loop be entered like
mine 3
and it would mine 3 in that direction?
Could you please go in to detail with the parallel API for me :)/>
295 posts
Posted 02 August 2013 - 05:07 PM
I got the turtle working another way:
http://pastebin.com/xwS2x1abThanks for the help
295 posts
Posted 03 August 2013 - 01:03 AM
Okay so I used example 1 and it would not loop, Code can be found here:
http://pastebin.com/8CAkZYG9
How exactly do you want this to behave? The code is valid and should have the turtle do the thing endlessly - however, you have to hit a key every time you want the turtle to do something. If you want to the turtle to just continuously do something until you hit a key, you will need to use the parallel API or coroutines. These are somewhat more advanced topics, but if you'd like I can go into more detail.
Another alternative is to have the turtle just do something a certain number of times. For this we would use a for loop.
Example:
for i=1,5 do
turtle.dig()
turtle.forward()
turtle.digUp()
end
So… Could i put a "for loop" inside for loop?
52 posts
Posted 03 August 2013 - 02:49 AM
Okay so I used example 1 and it would not loop, Code can be found here:
http://pastebin.com/8CAkZYG9
How exactly do you want this to behave? The code is valid and should have the turtle do the thing endlessly - however, you have to hit a key every time you want the turtle to do something. If you want to the turtle to just continuously do something until you hit a key, you will need to use the parallel API or coroutines. These are somewhat more advanced topics, but if you'd like I can go into more detail.
Another alternative is to have the turtle just do something a certain number of times. For this we would use a for loop.
Example:
for i=1,5 do
turtle.dig()
turtle.forward()
turtle.digUp()
end
So… Could i put a "for loop" inside for loop?
yes you can put a for loop in side a for loop.