I'm new in Lua and looking for internet I don't find a solution to my problem, or an answer if I actually can do the next thing.
I have the next table. As you can see the key has a í:
DB = {
["Vigía"] = 112
}
If I try to retrieve that value from the table it returns nil.
I tried removing the í character and then I can get the value 112.
Can I use latin characters as a key in this scenario?,
Thanks!
You should be able to, but there are some caveats (lua-users.org)
I've run your code at ideone, and it works fine. Perhaps your editor is doing something weird? What version of Lua are you using?
DB = {
["Vigía"] = 112
}
print(DB["Vigía"])
print(_VERSION)
Result:
Success time: 0.02 memory: 2540 signal:0
112
Lua 5.1
Related
I am trying to use the pipe character "|" in SPSS syntax with strange results:
In the syntax it appears like this:
But when I copy this line from the syntax window to here, this is what I get:
SELECT IF(SEX = 1 SEX = 2).
The pipe just disappears!
If I run this line, this is the output:
SELECT IF(SEX = 1 SEX = 2).
Error # 4007 in column 20. Text: SEX
The expression is incomplete. Check for missing operands, invalid operators,
unmatched parentheses or excessive string length.
Execution of this command stops.
So the pipe is invisible to the program too!
When I save this syntax and reopen it, the pipe is gone...
The only way I found to get SPSS to work with the pipe is when I edited the syntax (adding the pipe) and saved it in an alternative editor (notepad++ in this case). Now, without opening the syntax, I ran it from another syntax using insert command, and it worked.
EDIT: some background info:
I have spss version 23 (+service pack 3) 64 bit.
The same things happens if I use my locale (encoding: windows-1255) or Unicode (Encoding: UTF-8). Suspecting my Hebrew keyboard I tried copying syntax from the web with same results.
Can anyone shed any light on this subject?
Turns out (according to SPSS support) that's a version specific (ver. 21) bug and was fixed in later versions.
If i have a string like "123123123" - Here 123 is repeated 3 times.
1. So how can i get only "123" in ruby?
2. So if the string is "12312312" - Here 123 is repeated 2 times and then just 12, so here still i need to get "123".
3. Even if string is 99123123123, still i need to get 123.
Is this possible in Ruby Regex?
EDIT: I want this to solve Project Euler Problem 26 . So here 123 can be anything. All i want is to extract 1 number of at-least 2 repeated numbers.
This regex will detect all repeating groups.
(\d+)(?=.*\1)
Demo
Works great with ruby too.
result = '9912341234123'.scan(/(\d+)(?=.*\1)/)
#gets group with largest length
longestRepeatingGroup = result.max_by{|arr| arr[0].length}
puts longestRepeatingGroup
puts longestRepeatingGroup[0].length
Try this
99123123123.scan(/123/).count
12312312.scan(/123/).count
I'm trying to parse a text file using lua and store the results in two arrays. I thought my pattern would be correct, but this is the first time I've done anything of the sort.
fileio.lua:
questNames = {}
questLevels = {}
lineNumber = 1
file = io.open("results.txt", "w")
io.input(file)
for line in io.lines("questlist.txt") do
questNames[lineNumber], questLevels[lineNumber]= string.match(line, "(%a+)(%d+)")
lineNumber = lineNumber + 1
end
for i=1,lineNumber do
if (questNames[i] ~= nil and questLevels[i] ~= nil) then
file:write(questNames[i])
file:write(" ")
file:write(questLevels[i])
file:write("\n")
end
end
io.close(file)
Here's a small snippet of questlist.txt:
If the dead could talk16
Forgotten soul16
The Toothmaul Ploy9
Well-Armed Savages9
And here's a matching snippet of results.txt:
talk 16
soul 16
Ploy 9
Savages 9
What I'm after in results.txt is:
If the dead could talk 16
Forgotten soul 16
The Toothmaul Ploy 9
Well-Armed Savages 9
So my question is, which pattern do I use in order to select all text up to a number?
Thanks for your time.
%a matches letters. It does not match spaces.
If you want to match everything up to a sequence of digits you want (.-)(%d+).
If you want to match a leading sequence of non-digits then you want ([^%d]+)(%d+).
That being said if all you want to do is insert a space before a sequence of digits then you can just use line:gsub("%d+", " %0", 1) to do that (the one to only do it for the first match, leave that off to do it for every match on the line).
As an aside I don't think io.input(file) is doing anything useful for you (or what you might expect). It is replacing the default standard input file handle with the file handle file.
I'm trying to find the hexadecimal non-printable character 00h within a string with Lua. I tried it with an escape character and as a result I get the same location I start in (that's a printable character). I fiddled around with the character classes, but that didn't amount to anything. My approach looks like this:
location = string.find(variable,"\00",startlocation)
I also tried it this way, but no luck:
location = string.find(variable, string.char(00),startlocation)
How can I find this non-printable pattern in Lua?
It works fine for me:
> return string.find("one\0two\0,three","\0,")
8 9
> return string.find("one\0two\0,three","\0")
4 4
> return string.find("one\0two\0,three","\00")
4 4
> return string.find("one\0two\0,three","\00",6)
8 8
Why i need to use it is because for some printers using TPrinter prints some weird hieroglyph at the beginning of the printable area.
My problem is that if i send some commands, nothing happens.
ESC E (#27 #69) - Sending this escape sequence didn't work as i expected. It removed first letter and rest of the string made bold. eg. Hello -> ello. After i changed it to ESC E ESC (#27 #69 #27), it worked fine. This example i managed to figure out, but...
trying to select character table "ESC t n" (#27 #116 n), to make "õäöü" work. This command just doesn't work. Nothing happens! And this command is supported by esc/p, esc/p 2 and 9-pin esc/p, so it should work just fine.
Manual can be found here.
If anyone has ever needed to use esc/p commands then maybe one can shed some light how to work with them!
Thanks in advance!
EDIT:
In my previous post i asked more or less the same question though answers were about how did i send commands to the printer. (I'll change my question there according to what was the answers!)
I accepted Ken's answer, because he claimed that the way i transferred the commands wasn't the best and i got it to work with Escape command.
The problem was that after trying to use my program with another printer, it didn't work as expected, because it uses TPrinter.Begindoc and EndDoc.
So actually i must use the other solution that Rob Kennedy helped me with!
EDIT 2:
As it turned out, i used wrong manual, where commands are little different (though still supporting esc/p as it proclaims). Thank you all for your help!
PS!
I still have a question: I need a character table where
245 = õ
228 = ä
246 = ö
252 = ü
which is iso 8859. But in manual there is no such character table or any similar to it. Should i do some string manipulation and replace eg 228 to 132 or does anyone know any better approuch?
I keep it unanswered for a while, and then accept stukelly's answer.
Based on your previous question, I think you are using the wrong commands to control the EPSON TM-T70 receipt printer. After some research I found the product brochure and POSMicro both mention ESC/POS.
The ESC/POS command for turning bold on and off requires has a third value, as follows.
ASCII ESC E n
Hex 1B 45 n
Decimal 27 69 n
Where n is 0 or 1, turning bold off or on.
Here is a detailed ESC/POS reference.