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Why em instead of px?
...tter choice than the other (or both wouldn't have been given their own purpose in the spec). It may even be worth noting that StackOverflow makes extensive use of px units. It is not the poor choice Spoike was told it was.
Definition of units
px is an absolute unit of measurement (like in, pt, ...
overlay two images in android to set an imageview
... android:left, android:right, android:top and android:down to control the position of one of the layers in the .xml file.
– zabawaba99
Oct 24 '12 at 3:44
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What does Docker add to lxc-tools (the userspace LXC tools)?
If you take a look at Docker's features, most of them are already provided by LXC.
5 Answers
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Multithreading: What is the point of more threads than cores?
...
The answer revolves around the purpose of threads, which is parallelism: to run several separate lines of execution at once. In an 'ideal' system, you would have one thread executing per core: no interruption. In reality this isn't the case. Even if you hav...
C++ Dynamic Shared Library on Linux
...ual otherwise linker will try to perform static linkage */
virtual void DoSomething();
private:
int x;
};
#endif
myclass.cc
#include "myclass.h"
#include <iostream>
using namespace std;
extern "C" MyClass* create_object()
{
return new MyClass;
}
extern "C" void destroy_object( My...
Why does changing 0.1f to 0 slow down performance by 10x?
... (or subnormal) numbers are kind of a hack to get some extra values very close to zero out of the floating point representation. Operations on denormalized floating-point can be tens to hundreds of times slower than on normalized floating-point. This is because many processors can't handle them dire...
Sending files using POST with HttpURLConnection
...example on how to send a bitmap "file" (actually an in-memory stream) via POST to an Apache HTTP server. I'm not interested in cookies or authentication or anything complicated, but I just want to have a reliable and logic implementation. All the examples that I've seen around here look more like "l...
Difference between sh and bash
...or the Shell Command Language) is a programming language described by the POSIX
standard.
It has many implementations (ksh88, dash, ...). bash can also be
considered an implementation of sh (see below).
Because sh is a specification, not an implementation, /bin/sh is a symlink
(or a hard link) to a...
tinyxml XML解析库下载（tinyxml2.h 和 tinyxml2.cpp） - 源码下载 - 清泛...
...库下载（tinyxml2.h 和 tinyxml2.cpp）tinyxml XML解析C++编写的，一个 h，一个 cpp，绿色小巧，直接加入工程源码编译，跨平台。使用方法参见《C++ 读写xml方法整理（持续更新）》tinyxml2 h *O C++编写的，一个.h，一个.cpp，绿色小巧，直...
Adding the “Clear” Button to an iPhone UITextField
...n attribute for adding this sub-control in Interface Builder in the iPhone OS 2.2 SDK.
10 Answers
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