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What do the following phrases mean in C++: zero-, default- and value-initialization?
...) {}; ~C(); int m; }; // non-POD, default-initialising m
int main()
{
char buf[sizeof(B)];
std::memset( buf, 0x5a, sizeof( buf));
// use placement new on the memset'ed buffer to make sure
// if we see a zero result it's due to an explicit
// value initialization
B* pB =...
Detecting which UIButton was pressed in a UITableView
...)metaData:(id)target
Enjoy
#import <objc/runtime.h>
static char const * const kMetaDic = "kMetaDic";
#pragma mark - Getters / Setters
- (id)metaData:(id)target {
return objc_getAssociatedObject(target, kMetaDic);
}
- (void)setMetaData:(id)target withObject:(id)newObj {
...
What is the use of the square brackets [] in sql statements?
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The brackets are required if you use keywords or special chars in the column names or identifiers. You could name a column [First Name] (with a space)--but then you'd need to use brackets every time you referred to that column.
The newer tools add them everywhere just in case or f...
Fastest method to escape HTML tags as HTML entities?
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In normal text escaped characters are rare. It's better to call replace only when needed, if you care about max speed: if (/[<>&"]/.test(str) { ... }
– Vitaly
Oct 26 '14 at 4:22
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How do I replace whitespaces with underscore?
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This doesn't work with other whitespace characters, such as \t or a non-breaking space.
– Roberto Bonvallet
Jun 17 '09 at 15:49
13
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How to stop C++ console application from exiting immediately?
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Edit: As Charles Bailey rightly points out in a comment below, this won't work if there are characters buffered in stdin, and there's really no good way to work around that. If you're running with a debugger attached, John Dibling's ...
Is there a way to ignore header lines in a UNIX sort?
... after the end of the first line. If you run it on a pipe, bash reads one char at a time until it passes the end of the line.
– Sam Watkins
May 5 '15 at 9:01
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Search for all occurrences of a string in a mysql database [duplicate]
... search (it will search in selected tables only)
In search you can use wildChars.
MySQL Workbench screen shot:
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getting type T from IEnumerable
...separate if statement to handle strings since it implements IEnumerable<char>
– Edmund P Charumbira
Aug 16 '18 at 9:23
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What is the $? (dollar question mark) variable in shell scripting? [duplicate]
...able hold? I can't Google search the answer because they block punctuation characters.
9 Answers
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