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What does the Q_OBJECT macro do? Why do all Qt objects need this macro?
I just started using Qt and noticed that all the example class definitions have the macro Q_OBJECT as the first line. What is the purpose of this preprocessor macro?
...
Migrating from JSF 1.2 to JSF 2.0
... JSP 2.x
If you're using JSP 2.x and want to keep using it, then you basically don't need to change anything else.
Gradually upgrading
If you're already using a suffix url-pattern for the FacesServlet, like *.jsf, then it's good to know that the FacesServlet will first scan for *.xhtml file and ...
Change the font of a UIBarButtonItem
...t implementation:
buttonItem.setTitleTextAttributes([
NSAttributedStringKey.font: UIFont(name: "Helvetica-Bold", size: 26.0)!,
NSAttributedStringKey.foregroundColor: UIColor.green],
for: .normal)
share
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Nullable type issue with ?: Conditional Operator
...mon ancestor type, it just tries to find a conversion between each other. (Extra bit: C# recognizes a <null> type, i.e. the type of every null expression.)
– IllidanS4 wants Monica back
Nov 4 '14 at 0:50
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How can I launch Safari from an iPhone app?
...
should be the following :
NSURL *url = [NSURL URLWithString:@"http://www.stackoverflow.com"];
if (![[UIApplication sharedApplication] openURL:url]) {
NSLog(@"%@%@",@"Failed to open url:",[url description]);
}
...
Best practices to handle routes for STI subclasses in rails
...ethodError (undefined method `building_url' for
I ended up adding in the extra routes for the child classes and pointing them to the same controllers
resources :structures
resources :buildings, :controller => 'structures'
resources :bridges, :controller => 'structures'
Additionally:
&...
How do I draw a shadow under a UIView?
...
Just add that extra line in addition to the others.
– christophercotton
Oct 2 '11 at 23:43
11
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How can i query for null values in entity framework?
...g this bug!
For backwards compatibility, it will be opt-in - you need manually enable a setting to make entry == value work. No word yet on what this setting is. Stay tuned!
Edit 2: According to this post by the EF team, this issue has been fixed in EF6! Woohoo!
We changed the default be...
What's the difference between including files with JSP include directive, JSP include action and usi
...-app. The included content becomes part of the compiled JSP and there's no extra cost at runtime.
<jsp:include> (and JSTL's <c:import>, which is similar and even more powerful) are best suited to dynamic content. Use these when you need to include content from another URL, local or remo...
Simplest/Cleanest way to implement singleton in JavaScript?
...
return { // public interface
publicMethod1: function () {
// all private members are accessible here
},
publicMethod2: function () {
}
};
})();
This has been called the module pattern, it basically allows you to encapsulate private members on an object, by taking advant...