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What is the real overhead of try/catch in C#?
...!_user.Rights.Contains(rightName))
throw new Exception();
}
When the test database got fuller with test data, this lead to a very visible slowdown while openening new forms etc.
So I refactored it to the following, which - according to later quick 'n dirty measurements - is about 2 orders of ...
Download multiple files as a zip-file using php
...nd stream it to the client. Something like:
$files = array('readme.txt', 'test.html', 'image.gif');
$zipname = 'file.zip';
$zip = new ZipArchive;
$zip->open($zipname, ZipArchive::CREATE);
foreach ($files as $file) {
$zip->addFile($file);
}
$zip->close();
and to stream it:
header('Cont...
Open existing file, append a single line
...xtWriter tw = new StreamWriter("file.txt");
//Write to file
tw.WriteLine("test info");
//Close File
tw.Close();
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Which iomanip manipulators are 'sticky'?
...o the stream. Unfortunately this does not preclude them from being sticky. Tests indicate that all of them except setw are sticky.
setiosflags: Sticky
resetiosflags:Sticky
setbase: Sticky
setfill: Sticky
setprecision: Sticky
All the other manipulators return a stream object. Thus any s...
When to use nil, blank, empty? [duplicate]
...
I found a good explanation here:
nil? tests whether the object is
exactly nil, that is whether it is the
one and only want instance of
NilClass.
empty? is a method some objects
respond to. You need to check the
documentation for each case. For
ex...
What are the most widely used C++ vector/matrix math/linear algebra libraries, and their cost and be
...nefits: Very complete numeric library. Very, very fast (supposedly the fastest solver). By far the largest, most complete mathematical API. Commercially supported, mature, and stable.
Downsides: Cost - not inexpensive. Very few geometric/rendering specific methods, so you'll need to roll your o...
Technically what is the main difference between Oracle JDK and OpenJDK? [duplicate]
...mercial software I would suggest to go for Oracle JDK, as it is thoroughly tested and stable.
I have faced lot of problems with application crashes using OpenJDK, which are fixed just by switching to Oracle JDK
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Difference between window.location.href, window.location.replace and window.location.assign
...nction for a side effect is more readable. Also you can easily mock it for testing.
– Mohamed Ramrami
Sep 14 at 15:08
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Delete all Duplicate Rows except for One in MySQL? [duplicate]
...n your connection for a large table.
NB - You need to do this first on a test copy of your table!
When I did it, I found that unless I also included AND n1.id <> n2.id, it deleted every row in the table.
If you want to keep the row with the lowest id value:
DELETE n1 FROM names n1, nam...
Detect if an element is visible with jQuery [duplicate]
...r to use jQuery considering you're using it in other places anyway:
if($('#testElement').is(':visible')) {
// Code
}
It is important to note that if any one of a target element's parent elements are hidden, then .is(':visible') on the child will return false (which makes sense).
jQuery 3
:visib...