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Redouane
Master Cheater
![]() Reputation: 3
Joined: 05 Sep 2013
Posts: 363
Location: Algeria
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 Posted: Thu Dec 12, 2013 11:04 am Post subject: io.read() not working? |
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Hey,I tried to do this:
| Code: | a=io.read()
justastringtotest
print(a) -- nil |
the io.read() does not work properly,this code returns an error (it should place the string "justastringtotest" in a,here,a is nil
also,the following few lines work perfectly in the standalone lua interpreter but they don't work in CE's lua engine (CE Freezes when you execute the code)
| Code: | repeat
r=io.read()
main(r)
until r=="stop" |
In fact,the original code is much longer,It'll wait for you to enter a 1st or 2nd degree equation (ax˛+bx+c) then It'll extract a,b,c and calculate the solutions,the whole code works in the lua standalone interpreter but it crashes CE(freezes).
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daspamer
Grandmaster Cheater Supreme
 Reputation: 54
Joined: 13 Sep 2011
Posts: 1588
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| Posted: Thu Dec 12, 2013 11:47 am Post subject: |
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I'm not sure what you're doing... io.read()? no file?.
Use it like this
| Code: | f = io.open(Path, "r") --> Place the file you want to open and read, replace path.
print(f:read()) --> returns first line
print(f:read("*a")) --> returns whole file. |
Also the reason why the second function makes C.E freeze, is because :
You didn't use the
function in your code (allows new clicks and events.. without C.E being frozen on you)
Secondly, you didn't place any 'break' statement, because r = io.read(); equals to nil (based C.E), and you repeated it.. forever.. (without calling the processMessages() function as well).
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I'm rusty and getting older, help me re-learn lua. |
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mgr.inz.Player
I post too much
 Reputation: 222
Joined: 07 Nov 2008
Posts: 4438
Location: W kraju nad Wisla. UTC+01:00
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| Posted: Thu Dec 12, 2013 4:20 pm Post subject: |
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I think, you want to load whole txt file, line by line, to array object (or something similar).
| Code: | filecontent = {}
file = io.open('c:\\test\\testfile.txt', "r")
if file~=nil then
for line in file:lines() do
filecontent[#filecontent+1] = line
end
file:close()
end |
Should be much faster, and you don't need "processMessages" (if txt file isn't too big of course).
Avoid those constructions:
| Code: |
filecontent = ''
for line in file:lines() do
filecontent = filecontent..line
end |
I saw few benchmarks. "Table" is better than "string" (concatenating inside loop).
Read Lua manual too (http://www.lua.org/)
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Redouane
Master Cheater
![]() Reputation: 3
Joined: 05 Sep 2013
Posts: 363
Location: Algeria
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| Posted: Sun Dec 15, 2013 5:54 am Post subject: |
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I'm not trying to read a file,my code asks the user to enter a string (equation) then it reads the string with that,It's just an experiment that worked fine in the standalone lua interpreter.
In the standalone lua interpreter,if you enter a=io.read("*number"),then on the next line you enter 5354 It will assign the value 5354 to a,here,it reads the whole line.
@Daspammer thanks for the processMessages() function 
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mgr.inz.Player
I post too much
Reputation: 222
Joined: 07 Nov 2008
Posts: 4438
Location: W kraju nad Wisla. UTC+01:00
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| Posted: Sun Dec 15, 2013 9:52 am Post subject: |
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Oh, you didn't write you want to read user input from stdin.
In CE, there's no Lua Console. You can mimic this. You need form, editbox and OnKeyPress method.
You can test below CT file. Open it with CE, execute lua script.
Type whatever you want, if input is a number (it can be converted to a number) it will assign than number to variable A, otherwise it will NIL variable A.
| Code: | function passwordeditkeypress(sender, key)
if key ~= '\r' then return key end
local input=UDF1.CEEdit1.Caption
UDF1.CEEdit1.Caption=''
if input=='' then return end
if tonumber(input) then
A = input+0 -- cast to number
UDF1.CEMemo1.append('assigned value '..input..' to variable A')
else
A = nil
UDF1.CEMemo1.append('user input: '..input..'. Variable A NIL\'ed')
end
end
UDF1.CEEdit1.OnKeyPress = passwordeditkeypress
UDF1.show() |
CEMemo1 is only for logging. You can remove lines with CEMemo1.
Paste your original code you use in the lua standalone interpreter. I can try to port it to CE Lua.
| Description: |
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Download |
| Filename: |
userinput.ct |
| Filesize: |
1 KB |
| Downloaded: |
882 Time(s) |
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