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Android应用开发性能优化完全分析 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...费时，完全没有static final的变量好用、高效。
Handler发送消息时尽量使用obtain去获取已经存在的Message对象进行复用，而不是新new Message对象，这样可以减轻内存压力。
在使用后台Service时尽量将能够替换为IntentService的地方...
廉价共享存储解决方案1-drbd+ha+nfs - 更多技术 - 清泛网 - 专注C/C++及内核技术
...度器之间，通过tcp/ip发给另外一台主机到对方的tcp/ip最终发送给对方的drbd，再由对方的drbd存储在本地对应磁盘 上，类似于一个网络RAID-1功能。在高可用(HA)中使用DRBD功能，可以代替使用一个共享盘阵。本地(主节点)与远程主机(...
Eclipse RCP开发桌面程序 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...：
可以看到，Navigate方法的id为0x00000068，转化为十进制就是104，而它需要的参数第一个是一个字符串，其它的都是可选的，因此，我们可以这样调用它的方法：
Variant url = new Variant("http://www.blogjava.net/");
automation.invoke(104, ...
Win32汇编--使用MASM - C/C++ - 清泛网 - 专注C/C++及内核技术
...试和忽略
MB_HELP——消息框上显示一个帮助按钮，按下后发送WM_HELP消息
MB_OK——消息框上显示一个确定按钮，这是默认值
……
要在消息框中显示图标，用下面的某一个标志：
MB_ICONWARNING——显示惊叹号图标
MB_ICONINFORMATION—...
NSRange to Range
...
juancazalla
9461010 silver badges1616 bronze badges
answered Oct 22 '14 at 21:46
Alex PretzlavAlex Pretzlav
15....
u'\ufeff' in Python string
...BOM, and is used to tell the difference between big- and little-endian UTF-16 encoding. If you decode the web page using the right codec, Python will remove it for you. Examples:
#!python2
#coding: utf8
u = u'ABC'
e8 = u.encode('utf-8') # encode without BOM
e8s = u.encode('utf-8-sig') # ...
How many bytes does one Unicode character take?
...s information. Those are the various unicode encodings, such as utf-8, utf-16le, utf-32 etc. They are distinguished largely by the size of of their codeunits. UTF-32 is the simplest encoding, it has a codeunit that is 32bits, which means an individual codepoint fits comfortably into a codeunit. The ...
What do numbers using 0x notation mean?
...
Literals that start with 0x are hexadecimal integers. (base 16)
The number 0x6400 is 25600.
6 * 16^3 + 4 * 16^2 = 25600
For an example including letters (also used in hexadecimal notation where A = 10, B = 11 ... F = 15)
The number 0x6BF0 is 27632.
6 * 16^3 + 11 * 16^2 + 15 * 16...
RGB to hex and hex to RGB
...d zero padding:
function componentToHex(c) {
var hex = c.toString(16);
return hex.length == 1 ? "0" + hex : hex;
}
function rgbToHex(r, g, b) {
return "#" + componentToHex(r) + componentToHex(g) + componentToHex(b);
}
alert(rgbToHex(0, 51, 255)); // #0033ff
Converting t...
What is a “surrogate pair” in Java?
...to a means of encoding Unicode characters with high code-points in the UTF-16 encoding scheme.
In the Unicode character encoding, characters are mapped to values between 0x0 and 0x10FFFF.
Internally, Java uses the UTF-16 encoding scheme to store strings of Unicode text. In UTF-16, 16-bit (two-byte...