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How can I programmatically get the MAC address of an iphone
.....
- (NSString *)getMacAddress
{
int mgmtInfoBase[6];
char *msgBuffer = NULL;
size_t length;
unsigned char macAddress[6];
struct if_msghdr *interfaceMsgStruct;
struct sockaddr_dl *socketStruct;
NSString *errorFlag = NULL...
Does Notepad++ show all hidden characters?
...ould identify the character, where cursor takes 2 arrow keys
to move, just select that character.
do Ctrl-F
now you can count or
replace or even mark all such characters
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Assign one struct to another in C
...ment is supported for structs. However, there are problems:
struct S {
char * p;
};
struct S s1, s2;
s1.p = malloc(100);
s2 = s1;
Now the pointers of both structs point to the same block of memory - the compiler does not copy the pointed to data. It is now difficult to know which struct insta...
Smart way to truncate long strings
...rd" and "soft" limits, like, for example, if the string is longer than 500 character, truncate it to 400. This may be useful, when the user wants to see the whole text and clicks some link for it. If, as a result, you load just 1 or 2 chars more, it will look really ugly.
– Max...
How to convert integer to string in C? [duplicate]
...
Use sprintf():
int someInt = 368;
char str[12];
sprintf(str, "%d", someInt);
All numbers that are representable by int will fit in a 12-char-array without overflow, unless your compiler is somehow using more than 32-bits for int. When using numbers with gre...
Why is the Windows cmd.exe limited to 80 characters wide?
...
It isn't. You can right click the title bar, select properties, and in the "Layout" tab alter the screen buffer size (line width and scrollback) and the window size (viewport size). If you started cmd from a shortcut, you can save these settings for future sessions.
...
How to convert a string of numbers to an array of numbers?
... the string so x=>+x (which is even shorter than the Number function (5 chars instead of 6)) is equivalent to :
function(x){return parseInt(x,10)}// version from techfoobar
(x)=>{return parseInt(x)} // lambda are shorter and parseInt default is 10
(x)=>{return +x} ...
Check if a string has white space
...) {
return /\s/g.test(s);
}
This will also check for other white space characters like Tab.
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Concept behind these four lines of tricky C code
... {
m[0] *= 2;
main();
}
else
{
printf((char*) m);
}
}
It recursively calls main() 771 times.
In the beginning, m[0] = 7709179928849219.0, which stands for C++Suc;C. In every call, m[0] gets doubled, to "repair" last two letters. In the last call, m[0] cont...
Textarea onchange detection
...lly know how off you are: could be typing or deleting, and could have text selected meaning it's more than just +/- 1).
– brianmearns
Apr 26 '12 at 15:24
66
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