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Using emit vs calling a signal as if it's a regular function in Qt
...:foo()
{
QMetaObject::activate(this, &staticMetaObject, 0, 0);
}
And the code emit foo(); is pre-processed to simply foo();
emit is defined in Qt/qobjectdefs.h (in the open-source flavor of the source anyway), like this:
#ifndef QT_NO_EMIT
# define emit
#endif
(The define guard is to a...
Just what is an IntPtr exactly?
Through using IntelliSense and looking at other people's code, I have come across this IntPtr type; every time it has needed to be used I have simply put null or IntPtr.Zero and found most functions to work. What exactly is it and when/why is it used?
...
Comprehensive beginner's virtualenv tutorial? [closed]
I've been hearing the buzz about virtualenv lately, and I'm interested. But all I've heard is a smattering of praise, and don't have a clear understanding of what it is or how to use it.
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Can I mix Swift with C++? Like the Objective-C .mm files
I just changed my .m files to .mm and use C++. Is there a way to do the same with Swift?
13 Answers
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What are the best practices for catching and re-throwing exceptions?
... do something meaningful.
"Something meaningful" might be one of these:
Handling the exception
The most obvious meaningful action is to handle the exception, e.g. by displaying an error message and aborting the operation:
try {
$connect = new CONNECT($db, $user, $password, $driver, $host);
}...
Prevent jQuery UI dialog from setting focus to first textbox
... textboxes (I only show the code for 1 for brevity) in that dialog div tag and it is changed to be a jQuery UI DatePicker textbox that reacts on focus.
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How to handle anchor hash linking in AngularJS
Do any of you know how to nicely handle anchor hash linking in AngularJS ?
27 Answers
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Difference between getDefaultSharedPreferences and getSharedPreferences
What is the difference between getDefaultSharedPreferences and getSharedPreferences in Android? Can anyone please explain?
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How do I allow HTTPS for Apache on localhost?
...
Ensure you have write permissions to your Apache conf folder
Open a command prompt in Apache2\conf folder
Type
..\bin\openssl req -config openssl.cnf -new -out blarg.csr -keyout blarg.pem
You can leave all questions blank except:
PEM Passphrase: a temporary password such as "password"
Common N...
jQuery or javascript to find memory usage of page
...use. Unfortunately, right now this is still a Chrome only feature (a non-standard extension of window.performance).
window.performance.memory
Browser support: Chrome 6+
2012 Answer
Is there a way to find out how much memory is being used by a web page, or by my jquery application? I'm look...