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How to declare a variable in MySQL?
...nitial value is NULL.
The scope of a local variable is the BEGIN ... END block within
which it is declared.
Server System Variables (prefixed with @@):
The MySQL server maintains many system variables configured to a default value.
They can be of type GLOBAL, SESSION or BOTH.
Global variables af...
RAII and smart pointers in C++
...The idea is that often you happen to allocate resources at the begin of a block, and need to release it at the exit of a block. Exiting the block can happen by normal flow control, jumping out of it, and even by an exception. To cover all these cases, the code becomes more complicated and redundant...
CSS Box Shadow - Top and Bottom Only [duplicate]
...est solutions but maybe it will help someone.
HTML
<div class="shadow-block">
<div class="shadow"></div>
<div class="overlay">
<div class="overlay-inner">
content here
</div>
</div>
</div>
CSS
.overlay {
...
How to build Qt for Visual Studio 2010
...elow link and it might be useful
1)https://www.slicer.org/slicerWiki/index.php/Documentation/Nightly/Developers/Build_Instructions/Prerequisites/Qt#Windows_3
2)http://eecs.vanderbilt.edu/research/hmtl/wp/index.php/qt-vs/
sha...
vim, switching between files rapidly using vanilla Vim (no plugins)
....html normal! mH
autocmd BufLeave *.js normal! mJ
autocmd BufLeave *.php normal! mP
augroup END
I recently found this gem in someone else's ~/.vimrc. It creates a file mark at the exact position of the cursor whenever you leave a buffer so that, wherever you are, 'J jumps to the latest Java...
How can I send an inner to the bottom of its parent ?
...to bold the sections I changed, but the Markdown doesn't apply inside code blocks :-P
– Jon Smock
Jan 27 '10 at 14:11
...
What's the best way to determine the location of the current PowerShell script?
...ce to call from for this purpose). When called inside a function or script block, the former returns the empty string, whereas the latter returns the function body's / script block's definition as a string (a piece of PowerShell source code).
– mklement0
Sep 4 ...
Conditional Variable vs Semaphore
...then no other threads are allowed to acquire the resource. The threads get blocked till other threads owning resource releases. In short, the main difference is how many threads are allowed to acquire the resource at once ? Mutex --its ONE. Semaphore -- its DEFINED_COUNT, ( as many as semaphore co...
Twitter image encoding challenge [closed]
...ok for pieces in various orientations that look similar to non-overlapping blocks in the original image. It takes a very brute force approach to this search, but that just makes it easier to introduce my modifications.
The first modification is that instead of just looking at ninety degree rotatio...
Running multiple async tasks and waiting for them all to complete
...n difference between Task.WaitAll and Task.WhenAll is that the former will block (similar to using Wait on a single task) while the latter will not and can be awaited, yielding control back to the caller until all tasks finish.
More so, exception handling differs:
Task.WaitAll:
At least one of the ...