NUL is the abbreviation for the null character in several character sets
NUL has a value of 0 and is often written as the escape sequence \0. It is used as a terminator in c standard strings.
Questions tagged [nul]
179 questions
2
votes
1 answer
>nul redirection before or after command in batch
In command prompt, the following two lines give the same output, I want to know the usage difference between them. Thanks.
>nul dir
dir >nul
Moe
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2
votes
3 answers
*char ending with double '\0'
My code is crashing because of a lack of the char '\0' at the end of some strings.
It's pretty clear to me why we have to use this termination char. My question is,
is there a problem adding a potential 2nd null character to a character array - to…
Rômulo M. Farias
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2
votes
2 answers
Nul byte representation in Python
I have question that I am having a hard time understanding what the code might look like so I will explain the best I can. I am trying to view and search a NUL byte and replace it with with another NUL type byte, but the computer needs to be able to…
LookingForAnswer
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2
votes
1 answer
How does a null character (\u0000) end up in a string?
I have a class in which there is a method that terminates the program in case a string has the NUL character in it. The particular expression is this:
stringVar.indexOf('\u0000') < 0
This string is read from the user via Scanner and I really wonder…
Haggra
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2
votes
0 answers
TypeError: "embedded NUL character" to stick little pictures on a white picture
I want to create a "DOBBLE" game, but,
to create a DOBBLE card game, I just want to put some symbols (little pictures) on a bigger, but the Shell return this:
"embedded NUL character".
My program is:
def creer_carte(L):
S=associer() #a list of…
Jérémy André
- 33
- 4
2
votes
2 answers
Update multiple columns in MySQL but only when a value is not null
I have a MySQL table with multiple columns, A, B, and C.
I would like to update those columns using only one SQL statement. However, sometimes some of the columns can be null.
So, if A is null, only update B and C.
If A and B are null, only update…
Greeso
- 7,544
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2
votes
1 answer
How to add a NUL character separator using AWK in bash?
I have a function which outputs some file paths, I need these paths are separated by NUL charachter instead of new line \n character. I tried following code:
function myfunc
{
declare -a DUPS
# some commands to fill DUPS with appropriate…
PHP Learner
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2
votes
3 answers
Isn't '\0' != 0 true?
I am having some difficulties in understanding the condition of the while loop given below:
int main()
{
char s[]="Let's Get it Started";
int i=0;
while(s[i]!=0)
{
//do something
++i
}
}
I know that string is…
Patel
- 87
- 8
2
votes
0 answers
Odd Notepad++ Issue...Code Completely Replaced by NUL
I just had a really strange thing happen to me with Notepad++, and it could have been potentially devastating.
My entire JS/HTML5 file (~350 lines) was randomly replaced with NUL's.
All I know is that I saved my program, left Notepad++ going, and…
Quicksting
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2
votes
1 answer
Sublime Text returning nul control character
This seems to happen sporadically but every so often, a nul control character will appear in my Sublime Text editor. The file types are not limited - so far it has appeared in .scss, .html, .php and .js files. Its particularly annoying when editing…
Simon Shahriveri
- 31
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2
votes
1 answer
Create A Batch File Within Batch File - Echo ">NUL"
Situation:
I have a text log file that gets updated frequently.
I already have a batch file that can check it manually.
I want it (upon start-up of batch) to create a new .bat.
I'm having problems exporting/creating the "timeOut /t 2 >NUL"
part.
It…
Semedar
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2
votes
4 answers
NUL undeclared- first use in this function
From the web I understand that C contains NUL keyword.
But while compiling I get an error
NUL undeclared first use in this function'
My code fragment:
for (;;) {
char ch = (*pzDest = *pzSrc);
if (ch == NUL)
break;
…
Tinyspark
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1
vote
0 answers
IBOutlet will not instantiate
Alright,
I have a weird one here. I have created a VERY simple UIViewController that has 1 big UITextView on it.
In my .h file I declare a property like this:
@property (nonatomic, strong) IBOutlet UITextView *displayTextView;
and then synthesize…
iOS4Life
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- 13
1
vote
2 answers
wchar_t NUL in managed/unmanaged C++
I need to use this (unmanaged) C++ library. One of the methods has a wchar_t* as a parameter. Tried using it in C#, but all my attempts resulted in an error code 'invalid argument'.
I wrote a managed C++ wrapper for it - same problem. Now I compared…
Stonehead
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1
vote
1 answer
How to read a text file containing NUL characters?
I have a file that contains NUL characters.
This file is generated by another program I have no control over, but I have to read it in order to get some crucial information.
Unfortunately, readChar() truncates the output with this warning:
In…
Dan Chaltiel
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