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What does “dereferencing” a pointer mean?
...his way C encodes text in memory is known as ASCIIZ.
For example, if the string literal happened to be at address 0x1000 and p a 32-bit pointer at 0x2000, the memory content would be:
Memory Address (hex) Variable name Contents
1000 'a' == 97 (ASCII)
1001...
(grep) Regex to match non-ASCII characters?
...
[^\x00-\x7F] and [^[:ascii:]] miss some control bytes so strings can be the better option sometimes. For example cat test.torrent | perl -pe 's/[^[:ascii:]]+/\n/g' will do odd things to your terminal, where as strings test.torrent will behave.
...
How do ports work with IPv6?
Conventional IPv4 dotted quad notation separates the address from the port with a colon, as in this example of a webserver on the loopback interface:
...
What's wrong with this 1988 C code?
...colon after the 1 and the 0, when IN and OUT got replaced in the code, the extra semicolon after the number produced invalid code, for instance this line:
else if (state == OUT)
Ended up looking like this:
else if (state == 0;)
But what you wanted was this:
else if (state == 0)
Solution: re...
How do I break a string over multiple lines?
In YAML, I have a string that's very long. I want to keep this within the 80-column (or so) view of my editor, so I'd like to break the string. What's the syntax for this?
...
Typedef function pointer?
...he original type, for instance
typedef int myinteger;
typedef char *mystring;
typedef void (*myfunc)();
using them like
myinteger i; // is equivalent to int i;
mystring s; // is the same as char *s;
myfunc f; // compile equally as void (*f)();
As you can see, you...
Is there a way to loop through a table variable in TSQL without using a cursor?
... --decrease count
END
No Cursors, no temporary tables, no extra columns.
The USERID column must be a unique integer, as most Primary Keys are.
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Read error response body in Java
...nges for encoding or other things. Works in current environment.)
private String dispatch(HttpURLConnection http) throws Exception {
try {
return readStream(http.getInputStream());
} catch(Exception ex) {
readAndThrowError(http);
return null; // <- never gets here...
Mac OSX Lion DNS lookup order [closed]
... the hosts file, I have found that in some circumstances, Lion queries the IPv6 address for a domain if it senses that a domain is unreachable over the IPv4 network.
I discovered this when I noticed some ads that I had never seen before on Snow Leopard because I had redirected the ad domains to 127...
Use space as a delimiter with cut command
...pplications to specify the option and option-argument in the same argument string without intervening characters.
In other words: In this case, because -d's option-argument is mandatory, you can choose whether to specify the delimiter as:
(s) EITHER: a separate argument
(d) OR: as a value dire...