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Do sealed classes really offer performance Benefits?
...s do not perform better than non-sealed.
The issue comes down to the call vs callvirt IL op codes. Call is faster than callvirt, and callvirt is mainly used when you don't know if the object has been subclassed. So people assume that if you seal a class all the op codes will change from calvirts to...
Hash function that produces short hashes?
...e a 10 characters hash you get higher entropy if it is encoded with base64 vs base16 (or hex). How higher? With base16 you get 4 bits of information per character, with base64 this figure is 6bits/char. Totaly a 10 char "hex" hash will have 40bits of entropy while a base64 60bits. So it is slightly ...
Haskell, Lisp, and verbosity [closed]
...rious how "pleasant" (to use a horrid term) it is to write code in Haskell vs. Lisp.
8 Answers
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Is there any difference between GROUP BY and DISTINCT
...me execution plan.
http://sqlmag.com/database-performance-tuning/distinct-vs-group
Maybe there is a difference, if there are sub-queries involved:
http://blog.sqlauthority.com/2007/03/29/sql-server-difference-between-distinct-and-group-by-distinct-vs-group-by/
There is no difference (Oracle-styl...
What's the equivalent for eclipse's ALT+UP/DOWN (move line) in Visual Studio?
... + UP/DOWN will move a line up or down.
If you need this functionality in VS2012 (works with VS2010 too), take a look at the MoveLine Visual Studio Extension or the Productivity Power Tools suite.
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Disabling highlighting of current line in the Visual Studio editor
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At least on my machine (VS2013), turning off the annoying highlight bar significantly sped up the scrolling speed - or at least changed from snail-speed to only slow. Changing the color of the bar probably wouldn't do that.
– ...
What are the differences between Autotools, Cmake and Scons?
... like out of a PPA, or their distribution vendor. "Normal" users aren't devs and aren't grabbing tarballs in many cases. That's snobbery on everyone's part for presuming that is going to be the case there. The typical users for tarballs are devs doing things, so they're going to get slammed with ...
What's the difference between jQuery's replaceWith() and html()?
...d="test_id">
<p>My Content</p>
</div>
1.) html() vs replaceWith()
var html = $('#test_id p').html(); will return the "My Content"
But the
var replaceWith = $('#test_id p').replaceWith(); will return the whole DOM object of
<p>My Content</p>.
2.) html('val...
No resource found - Theme.AppCompat.Light.DarkActionBar
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For anyone out there using VS2015, I was getting this error too, and it turns out I hadn't added the library to the project...
Install-Package Xamarin.Android.Support.v7.AppCompat
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What is the correct way to create a single-instance WPF application?
...ia Visual Studio as shown here: msdn.microsoft.com/en-us/library/ms241442(VS.80).aspx
– Matt Davis
Oct 19 '10 at 14:51
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