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How are 3D games so efficient? [closed]
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In general, it's because
The games are being optimal about what they need to render, and
They take special advantage of your hardware.
For instance, one easy optimization you can make involves not actually trying to draw things that can't be seen. Consider a complex scene like...
How to escape text for regular expression in Java
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I just wantet to point out that this way of escaping applies escaping also on expressions that you introduce afterwards. This may be surprising. If you do "mouse".toUpperCase().replaceAll("OUS","ic") it will return MicE. You would’t expect it to ...
Why should the copy constructor accept its parameter by reference in C++?
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Compilers can happily spit out infinite recursion; I suspect this isn't a special case. However, the program is ill-formed if you declare a copy constructor with a non-reference parameter. So you're right that it shouldn't compile.
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Open firewall port on CentOS 7
...you hit the right one, please. Use firewall-cmd --get-active-zones to find out what zone is used on your system. Also, man firewall-cmd.
– basic6
Apr 14 '15 at 21:27
1
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Are negative array indexes allowed in C?
...lement. Otherwise, it is not valid, because you would be accessing memory outside the bounds of the array. So, for example, this would be wrong:
int arr[10];
int x = arr[-2]; // invalid; out of range
But this would be okay:
int arr[10];
int* p = &arr[2];
int x = p[-2]; // valid: accesse...
What are the precise rules for when you can omit parenthesis, dots, braces, = (functions), etc.?
...tail, and that's postfix notation.
You can chain infix notation calls without problem, as long as no method is curried. For example, I like to use the following style:
(list
filter (...)
map (...)
mkString ", "
)
That's the same thing as:
list filter (...) map (...) mkString ", "
Now, why ...
Git clone particular version of remote repository
I cloned a remote git repository about a month ago. The remote repository has undergone many changes and has now become unstable. Now I need another copy of the repository, version identical to the one I cloned a month ago.
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JavaScript editor within Eclipse [closed]
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Disclaimer, I work at Aptana. I would point out there are some nice features for JS that you might not get so easily elsewhere. One is plugin-level integration of JS libraries that provide CodeAssist, samples, snippets and easy inclusion of the libraries files into you...
Get int value from enum in C#
...fault underlying type for an enum is int.
However, as cecilphillip points out, enums can have different underlying types.
If an enum is declared as a uint, long, or ulong, it should be cast to the type of the enum; e.g. for
enum StarsInMilkyWay:long {Sun = 1, V645Centauri = 2 .. Wolf424B = 2147483...
Create or write/append in text file
I have a website that every time a user logs in or logs out I save it to a text file.
7 Answers
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