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What does the Q_OBJECT macro do? Why do all Qt objects need this macro?
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From the Qt documentation:
The Meta-Object Compiler, moc, is the
program that handles Qt's C++
extensions.
The moc tool reads a C++ header file.
If it finds one or more class
declarations that contain the Q_O...
How can I detect if a browser is blocking a popup?
...r user input, or something important), but the popup blocker prevents this from happening.
8 Answers
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How to JSON serialize sets?
...y to recover regular lists; if you convert sets to a dictionary using dict.fromkeys(s) then you lose the ability to recover dictionaries).
A more sophisticated solution is to build-out a custom type that can coexist with other native JSON types. This lets you store nested structures that include l...
Why no generics in Go?
...ow compilers are caused by C++ like generics and slow execution times stem from the boxing-unboxing approach that Java uses.
The fourth possibility not mentioned in the blog is going the C# route. Generating the specialized code like in C++, but at runtime when it is needed. I really like it, but G...
How to “perfectly” override a dict?
...ct that behaves like a dict quite easily with ABCs (Abstract Base Classes) from the collections.abc module. It even tells you if you missed a method, so below is the minimal version that shuts the ABC up.
from collections.abc import MutableMapping
class TransformedDict(MutableMapping):
"""A ...
Storing C++ template function definitions in a .CPP file
...the approach you describe above.
I recommend reading the following points from the C++ FAQ Lite:
Why can’t I separate the definition of my templates class from its declaration and put it inside a .cpp file?
How can I avoid linker errors with my template functions?
How does the C++ keyword expo...
How to affect other elements when one element is hovered
...ction to reverse, so that the elements are displayed in the opposite order from the one they're in the DOM. The screenshot above is from such a widget, implemented with pure CSS.
Flexbox is very well supported by 95% of modern browsers.
.rating {
display: flex;
flex-direction: row-revers...
How to fully delete a git repository created with init?
... also type cd (the space is important), drag and drop your git repo folder from Finder to the terminal window, press return, then type rm -fr .git, then return again.
On Ubuntu, use shortcut Ctrl + H.
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Make the current Git branch a master branch
... Note about git's merge "strategies": --strategy=ours is different from --strategy=recursive -Xours. I.e. "ours" can be a strategy in itself (result will be the current branch no matter what), or passed as an option to the "recursive" strategy (bring in other branch's changes, and automatica...
Does anyone beside me just NOT get ASP.NET MVC? [closed]
...In the Web Forms model, your pages correspond directly to the page request from the browser. Thus, if you are directing a user to a list of Books, you'll likely have a page somewhere called "Booklist.aspx" to which you'll direct him. In that page, you'll have to provide everything needed to show th...