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C++虚继承的概念 - C/C++ - 清泛网 - 专注C/C++及内核技术
...t.cpp
3: //说明：C++虚拟继承学习演示
4: //环境：VS2005
5: //blog：pppboy.blog.163.com
6: //----------------------------------------------------
7: #include "stdafx.h"
8: #include <iostream>
9: using namespace std;
10:
11: //Base
12: class ...
Scatterplot with marginal histograms in ggplot2
... of the ggplot objects:
hist_top <- ggplot()+geom_histogram(aes(rnorm(100)))
empty <- ggplot()+geom_point(aes(1,1), colour="white")+
theme(axis.ticks=element_blank(),
panel.background=element_blank(),
axis.text.x=element_blank(), axis.text.y=element_bl...
Why there can be only one TIMESTAMP column with CURRENT_TIMESTAMP in DEFAULT clause?
... has been lifted in recent versions of MySQL:
Changes in MySQL 5.6.5 (2012-04-10, Milestone 8)
Previously, at most one TIMESTAMP column per table could be
automatically initialized or updated to the current date and time.
This restriction has been lifted. Any TIMESTAMP column definitio...
What are 'closures' in .NET?
...ion();
}
static Action CreateAction()
{
int counter = 0;
return delegate
{
// Yes, it could be done in one statement;
// but it is clearer like this.
counter++;
Console.WriteLine("counter={0}", counter);
};...
How to select only 1 row from oracle sql?
....
SELECT user FROM Dual WHERE ROWNUM = 1
http://docs.oracle.com/cd/B19306_01/server.102/b14200/pseudocolumns009.htm
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convert string array to string
...
string[] test = new string[2];
test[0] = "Hello ";
test[1] = "World!";
string.Join("", test);
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pretty-print JSON using JavaScript
...
+100
Pretty-printing is implemented natively in JSON.stringify(). The third argument enables pretty printing and sets the spacing to use:
...
I need to get all the cookies from the browser
...et a list of escaped key=value pairs seperated by a semicolon.
secret=do%20not%20tell%you;last_visit=1225445171794
To simplify the access, you have to parse the string and unescape all entries:
var getCookies = function(){
var pairs = document.cookie.split(";");
var cookies = {};
for (var ...
iPhone Keyboard Covers UITextField
...
290
The usual solution is to slide the field (and everything above it) up with an animation, and the...
socket.error: [Errno 48] Address already in use
...
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