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Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
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Culprit: False Data Dependency (and the compiler isn't even aware of it)
On Sandy/Ivy Bridge and Haswell processors, the instruction:
popcnt src, dest
appears to have a false dependency on the destination register dest. Even ...
Unit test naming best practices [closed]
What are the best practices for naming unit test classes and test methods?
12 Answers
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Obstructed folders in Subversion
...ted" mean when you try to check into Subversion? I see two folders in red with text status of "obstructed." I don't see what this means anywhere in the docs.
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What exactly is node.js used for? [closed]
Is it a web server or a programming language for server-side scripts?
9 Answers
9
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Is it possible to force Excel recognize UTF-8 CSV files automatically?
...ing some data into CSV files. The application always uses UTF-8 because of its multilingual nature at all levels. But opening such CSV files (containing e.g. diacritics, cyrillic letters, Greek letters) in Excel does not achieve the expected results showing something like Г„/Г¤, Г–/Г¶ . A...
How to enable local network users to access my WAMP sites?
...s from the PC running the server i.e. localhost or 127.0.0.1 or ::1
But as it is a full version of Apache all you need is a little knowledge of the server you are using.
The simple ( hammer to crack a nut ) way is to use the 'Put Online' wampmanager menu option.
left click wampmanager icon -> Put...
raw vs. html_safe vs. h to unescape html
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Considering Rails 3:
html_safe actually "sets the string" as HTML Safe (it's a little more complicated than that, but it's basically it). This way, you can return HTML Safe strings from helpers or models at will.
h can only be used from within a controller or view, since it's from a helper. It w...
Why does Ruby have both private and protected methods?
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protected methods can be called by any instance of the defining class or its subclasses.
private methods can be called only from within the calling object. You cannot access another instance's private methods directly.
Here is a quick practical example:
def compare_to(x)
self.some_method <...
Is there a valid reason for enforcing a maximum width of 80 characters in a code file, this day and
Seriously. On a 22" monitor, it only covers maybe a quarter of the screen. I need some ammo to axe down this rule.
32 Answe...
How to use NSCache
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You use it the same way you would use NSMutableDictionary. The difference is that when NSCache detects excessive memory pressure (i.e. it's caching too many values) it will release some of those values to make room.
If you can recre...