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Virtual functions and performance - C++
...stion made me curious, so I went ahead and ran some timings on the 3GHz in-order PowerPC CPU we work with. The test I ran was to make a simple 4d vector class with get/set functions
class TestVec
{
float x,y,z,w;
public:
float GetX() { return x; }
float SetX(float to) { return x=to; }...
What is a practical use for a closure in JavaScript?
...clude:
Passing parameterised behaviour into an algorithm (classic higher-order programming):
function proximity_sort(arr, midpoint) {
arr.sort(function(a, b) { a -= midpoint; b -= midpoint; return a*a - b*b; });
}
Simulating object oriented programming:
function counter() {
var a = 0;
...
Where is PHP.ini in Mac OS X Lion? Thought it was in /usr/local/php5/lib
... on my Mac, uncommented httpd.conf, activated web sharing, installed MySQL etc.
I can't seem to find my PHP files, most importantly, PHP.ini.
...
How can you find and replace text in a file using the Windows command-line environment?
...tever is needed. Also beware, if you target UTF8, it may introduce a Byte Order Mark at the beginning of the file that did not appear in the original.
– Wyck
Mar 28 '14 at 17:23
7...
oracle group 取每组第一条 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...CT * FROM(
SELECT z.type , z.code ,ROW_NUMBER()
OVER(PARTITION BY z.type ORDER BY z.code) AS code_id
FROM group_info z
)
WHERE code_id =1;
这里涉及到的over()是oracle的分析函数。
参考sql reference文档：
Analytic functions compute an aggregate value based on a group of ...
SQL Server 2008: How to query all databases sizes?
...er_files F
INNER JOIN sys.databases D ON D.database_id = F.database_id
ORDER BY SizeInBytes desc
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When is it practical to use Depth-First Search (DFS) vs Breadth-First Search (BFS)? [closed]
...istribute even between connected machines if you don't insist on the exact order of visiting the nodes.
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Use of var keyword in C#
... make code more readable in some cases. If I have a Customer class with an Orders property, and I want to assign that to a variable, I will just do this:
var orders = cust.Orders;
I don't care if Customer.Orders is IEnumerable<Order>, ObservableCollection<Order> or BindingList<Orde...
.NET XML serialization gotchas? [closed]
...L through a web page (ASP.NET), you don't want to include the Unicode Byte-Order Mark. Of course, the ways to use or not use the BOM are almost the same:
BAD (includes BOM):
XmlTextWriter wr = new XmlTextWriter(stream, new System.Text.Encoding.UTF8);
GOOD:
XmlTextWriter wr = new XmlTextWriter(...
Write text files without Byte Order Mark (BOM)?
...to do this?
I can write file with UTF8 encoding but, how to remove Byte Order Mark from it?
9 Answers
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