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When to use f:viewAction / preRenderView versus PostConstruct?
...bean's constructor. This will thus run only once per view, session or application when the bean is view, session or application scoped. The <f:viewAction> is by default only invoked on initial GET request, but can via onPostback="true" attribute be configured to be invoked on postback requests...
C# Convert List to Dictionary
...e first lambda lets you pick the key, the second one picks the value.
You can play with it and make values differ from the keys, like this:
var res = list.ToDictionary(x => x, x => string.Format("Val: {0}", x));
If your list contains duplicates, add Distinct() like this:
var res = list.Di...
Does constexpr imply inline?
...tions in C++11 required them to be simple enough that they were often good candidates for inline expansion (the primary exception being those that are recursive). Since then, however, the rules have gotten progressively looser, so constexpr can be applied to substantially larger, more complex functi...
How do I include related model fields using Django Rest Framework?
...t will only include relationships for forward relationships, which in this case isn't quite what you need, since the teachers field is a reverse relationship.
If you've got more complex requirements (eg. include reverse relationships, nest some fields, but not others, or nest only a specific subset...
ImportError: no module named win32api
...
This is resolve my case as found on
Where to find the win32api module for Python?
pip install pypiwin32
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How do I make a matrix from a list of vectors in R?
...
One option is to use do.call():
> do.call(rbind, a)
[,1] [,2] [,3] [,4] [,5] [,6]
[1,] 1 1 2 3 4 5
[2,] 2 1 2 3 4 5
[3,] 3 1 2 3 4 5
[4,] 4 1 2 3 4 5
[5,] 5 ...
How to prevent gcc optimizing some statements in C?
... memory access has side effects, and therefore must be preserved. In this case, the store has the side effect of causing a page fault, and you want the compiler to preserve the page fault.
This way, the surrounding code can still be optimized, and your code is portable to other compilers which don...
How to collapse all methods in Xcode?
... and move/hover mouse cursor on any (start or end) braces. It will automatically highlight, block area.
Keep (hold) ⌘(command) button in pressed condition and click on highlighted area. It will enable quick menu popover window with Fold option.
Select Fold from menu list. It will fold your code an...
Is there a way to zoom the Visual Studio text editor with a keyboard shortcut?
...zoom my Visual Studio text editor and was without a mouse (don't ask). Typically I do this by holding down CTRL and scrolling the mouse wheel. I also couldn't figure out how to tab into the area where you can specify your zoom level in the lower left hand corner of the text editor window.
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Running multiple commands in one line in shell
...s command succeeded or failed. Unless set -e was previously invoked, which causes bash to fail on an error.
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