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Using the field of an object as a generic Dictionary key
...You might want to start with the Equals-Method and then (in GetHashCode()) xor the hash code of every member you compare in Equals.
public class Foo {
public string A;
public string B;
override bool Equals(object other) {
var otherFoo = other as Foo;
if (otherFo...
浅析为什么char类型的范围是 -128~+127 - C/C++ - 清泛网 - 专注C/C++及内核技术
...， 所以，这就是为什么能用 1000 0000表示-128的原因。
从而也是为什么char 是-128~127，而不是-127~127 ，short int 同样如此 -32768~32767 因为在16位中，-32768为原码为17位，丢弃最高位剩下的16为- 0 的原码相同。。。。
还有一个问...
一分钟读懂低功耗蓝牙(BLE) MTU交换数据包 - 创客硬件开发 - 清泛IT社区，...
...以一次性传输到对方）。
* MTU 交换是为了在主从双方设置一个PDU中最大能够交换的数据量，通过MTU的交换和双方确认（注意这个MTU是不可以协商的，只是通知对方，双方在知道对方的极限后会选择一个较小的值作为以...
快速开发CSS的利器LESS 系列教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...a中的packages文件夹中。
html文件能够解析less文件的设置
从http://lesscss.org下载less.js，并将less.js文件引入html页面中。
注意：
引入 XX.less 文件时，rel属性要设置为“stylesheet/less”
less.js 之前引入.less后缀的文件，即less.js最后...
Code Golf: Lasers
...ation in the main loop, we update $d if the beam is currently on a mirror. XOR'ing by 3 gives the correct behavior for a \ mirror and XOR'ing by 1 gives the correct behavior for a / mirror.
$d^=3*/\\/+m</>
Next, the current position $r is updated accoring to the current direction.
$r+=(1,-...
推荐系统算法初探 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...、个性歌单、热点微博，这些都是推荐系统的输出内容。从这些我们就可以总结出，推荐系统到底是做什么的。
目的1. 帮助用户找到想要的商品（新闻/音乐/……），发掘长尾
帮用户找到想要的东西，谈何容易。商品茫茫多，...
Merge multiple lines (two blocks) in Vim
...ng block (in the example in the question abc and def) have the same length XOR
the first line of the starting block is the longest, and you don't care about the additional spaces in between) XOR
The first line of the starting block is not the longest, and you additional spaces to the end.
...
Bash if statement with multiple conditions throws an error
...ither or both of its operands are true. You're thinking of "exclusive or" (XOR), which is true if exactly one of its operands is true. (Actually, there are versions of XOR that work on more than 2 operands, in which case it's true if an odd number of operands are true.)
– Gordo...
国内最美旅游景点TOP10 总有一处让你心动 - 杂谈 - 清泛网 - 专注C/C++及内核技术
...海的月和大理古城，大理还有更多“风花雪月”的风光，从千丝万缕的细节里给人们曼妙的体验。美丽的自然风光再配上身穿白族服装的少女，大理让人流连忘返。
主要景点：大理古城、洱海、双廊、苍山、崇圣寺三塔、蝴蝶...
Bitwise operation and usage
...wise it's 0.
OR is 1 if one or both of its inputs are 1, otherwise it's 0.
XOR is 1 only if exactly one of its inputs are 1, otherwise it's 0.
NOT is 1 only if its input is 0, otherwise it's 0.
These can often be best shown as truth tables. Input possibilities are on the top and left, the resulta...