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Objective-C: Property / instance variable in category
...
.h-file
@interface NSObject (LaserUnicorn)
@property (nonatomic, strong) LaserUnicorn *laserUnicorn;
@end
.m-file
#import <objc/runtime.h>
static void * LaserUnicornPropertyKey = &LaserUnicornPropertyKey;
@implementat...
Constructors in Go
... have a struct like this :
type Thing struct {
Name string
Num int
}
then, if the zero values aren't fitting, you would typically construct an instance with a NewThing function returning a pointer :
func NewThing(someParameter string) *Thing {
p := new(Thing)
p.Name = somePara...
How do you create a Swift Date object?
... Time in Swift
In Swift, dates and times are stored in a 64-bit floating point number measuring the number of seconds since the reference date of January 1, 2001 at 00:00:00 UTC. This is expressed in the Date structure. The following would give you the current date and time:
let currentDateTime = Da...
When to make a type non-movable in C++11?
...s address is part of its value. For example, the OS might keep a list of pointers to all initialized mutex objects. If std::mutex contained a native OS mutex type as a data member and the native type's address must stay fixed (because the OS maintains a list of pointers to its mutexes) then either s...
How to map a composite key with JPA and Hibernate?
...inner class):
public class TimePK implements Serializable {
protected Integer levelStation;
protected Integer confPathID;
public TimePK() {}
public TimePK(Integer levelStation, Integer confPathID) {
this.levelStation = levelStation;
this.confPathID = confPathID;
...
When is -XAllowAmbiguousTypes appropriate?
...s that a type is ambiguous if it doesn't appear to the right of the constraint, unless the constraint is using functional dependencies to infer the otherwise-ambiguous type from other non-ambiguous types. So let's compare the contexts of the two functions and look for functional dependencies.
class...
How to add JTable in JPanel with null layout?
I want to add JTable into JPanel whose layout is null . JPanel contains other components. I have to add JTable at proper position.
...
How to render a PDF file in Android
...rer(getSeekableFileDescriptor());
// let us just render all pages
final int pageCount = renderer.getPageCount();
for (int i = 0; i < pageCount; i++) {
Page page = renderer.openPage(i);
// say we render for showing on the screen
page.render(mBitmap, null, null, Page.RENDER_MODE...
What is the correct format to use for Date/Time in an XML file
...
Keep in mind this converts the date to UTC. When you process the date, you must convert it back to your current timezone based on locale (unless you are processing everything in UTC). Also, usually you would put a 'Z' at the end to denote the ...
Swift Programming: getter/setter in stored property
...ace the one that was just set.
So all you have to do is this:
var rank: Int = 0 {
didSet {
// Say 1000 is not good for you and 999 is the maximum you want to be stored there
if rank >= 1000 {
rank = 999
}
}
}
...