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Objective-C: Property / instance variable in category
...e, it wouldn't work.
Fortunately, the Objective-C runtime has this thing called Associated Objects that can do exactly what you're wanting:
#import <objc/runtime.h>
static void *MyClassResultKey;
@implementation MyClass
- (NSString *)test {
NSString *result = objc_getAssociatedObject(sel...
Struct like objects in Java
...ck such methods in your tests. If you create a new class you might not see all possible actions. It's like defensive programming - someday getters and setters may be helpful, and it doesn't cost a lot to create/use them. So they are sometimes useful.
In practice, most fields have simple getters and...
How to use the C socket API in C++ on z/OS
...nnect() API. When I do that, this is what I see:
FORMAT
X/Open
#define _XOPEN_SOURCE_EXTENDED 1
#include <sys/socket.h>
int connect(int socket, const struct sockaddr *address, socklen_t address_len);
Berkeley Sockets
#define _OE_SOCKETS
#include <sys/types.h>
#include <sys/soc...
Can't start Eclipse - Java was started but returned exit code=13
...ng Eclipse. I ran into this problem when trying to run Eclipse, having installed version 4.2 only minutes ago.
44 Answers
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Is it possible to figure out the parameter type and return type of a lambda?
...Andry that's a fundamental problem with function objects that have (potentially) multiple overloads of operator() not with this implementation. auto is not a type, so it can't ever be the answer to traits::template arg<0>::type
– Caleth
Jan 16 '18 at 12:1...
Logical operators (“and”, “or”) in DOS batch
...an implicit conjunction.
IF Exist File1.Dat IF Exist File2.Dat GOTO FILE12_EXIST_LABEL
If File1.Dat and File1.Dat exist then jump the label FILE12_EXIST_LABEL.
See also: IF /?
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The model backing the context has changed since the database was created
...
Ps, this goes in Global.asax Application_Start()
– BritishDeveloper
Feb 23 '13 at 0:08
48
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Using jquery to get element's position relative to viewport
...
Look into the Dimensions plugin, specifically scrollTop()/scrollLeft(). Information can be found at http://api.jquery.com/scrollTop.
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Generate random numbers with a given (numerical) distribution
...> choices(population, weights)
4
The optional keyword-only argument k allows one to request more than one sample at once. This is valuable because there's some preparatory work that random.choices has to do every time it's called, prior to generating any samples; by generating many samples at o...
How can I start PostgreSQL server on Mac OS X?
...
The Homebrew package manager includes launchctl plists to start automatically. For more information, run brew info postgres.
Start manually
pg_ctl -D /usr/local/var/postgres start
Stop manually
pg_ctl -D /usr/local/var/postgres stop
Start automatically
"To have launchd start postgresql now and res...