大约有 2,300 项符合查询结果（耗时：0.0226秒） [XML]
How efficient is locking an unlocked mutex? What is the cost of a mutex?
...ens often, then multiple locks would increase parallelism. At the cost of maintainability, since more locking means more debugging of the locking.
How efficient is it to lock a mutex? I.e. how much assembler instructions are there likely and how much time do they take (in the case that the mutex...
周鸿祎创业以来的“六大战役” 酷派会是最后一战 - 资讯 - 清泛网 - 专注C/...
...，导致了最终一拍两散。对于其中内幕，网上流传着各种版本，各执一词。不过通过梳理一遍，我相信错误是一半一半的。
2005年傅盛加入360，带领团队打造360安全卫士，而此时的周鸿祎依旧醉心于他的搜索，而结果就是，周鸿...
逆向工程——二进制炸弹(CSAPP Project) - 操作系统(内核) - 清泛网 - 专注...
...，只不过稍微分支多了点。可以写出如下的C代码的递归版本：
int fun7(const int *a, int b)
{
if (a == NULL)
return -1;
int ret = 0;
if (*a - b > 0)
{
ret = fun7(*(a + 4), b);
ret *= 2
}
else if (*a - b == 0...
What's the difference between utf8_general_ci and utf8_unicode_ci?
..., utf8 is a flawed UTF-8 implementation from early MySQL versions which remains only for backward compatibility. The fixed version was given the name utf8mb4.
Note: Newer versions of MySQL have updated Unicode sorting rules, available under names such as utf8mb4_0900_ai_ci for equivalent rules based...
Algorithm to compare two images
...the copy may do stuff like rotating, making negative, or adding trivial details (as well as changing the dimension of the image).
...
Lua简明教程 - 脚本技术 - 清泛IT论坛，有思想、有深度
...lua学习教程lua参考手册Lua参考手册的中文翻译（云风翻译版本）
关于Lua的标库，你可以看看官方文档：string， table， math， io， os。（全文完）
文章转自： 酷 壳 – CoolShell.cn
对外网用户的squid代理+认证 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...功能限制）的同时再增加对外网用户提供squid+认证功能。版本为：
FreeBSD6.2-RELEASE + Squid2.6-STABLE12 。
服务器及网络信息：
外网网卡：em0；外网ip：221.6.117.50/255.255.255.240
内网网卡：em1；内网ip：128.0.0.4/255.255.252.0
架设过程：...
Swift 编程语言入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...mberOfSides = 7
var shapeDescription = shape.simpleDescription()
这个版本的 Shape 类有些重要的东西不在：一个构造器来在创建实例时设置类。使用 init 来创建一个。
class NamedShape {
var numberOfSides: Int = 0
var name: String
init(name: Str...
How to convert number to words in java
..." ");
}
/**
* testing
* @param args
*/
public static void main(String[] args) {
System.out.println("*** " + EnglishNumberToWords.convert(0));
System.out.println("*** " + EnglishNumberToWords.convert(1));
System.out.println("*** " + EnglishNumberToWords.convert(16));
S...
Bomb dropping algorithm
...g layer 1, because the
"blast radius" you get from doing so is always contained within the blast radius of
another square from layer 2. You should be able to easily convince yourself of this.
So, we can reduce the problem to finding an optimal way to bomb away the perimeter, then we can repeat t...