大约有 3,000 项符合查询结果(耗时:0.0111秒) [XML]

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Redis消息通知系统的实现 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...户,如此一来顶多是反应慢点,但不会崩溃。 Redis的LIST数据类型可以很自然的创建一个队列,代码如下: <?php $redis = new Redis; $redis->connect('/tmp/redis.sock'); $redis->lPush('usr', <USRID>); while ($usr = $redis->rPop('usr')) { var_dump($u...
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Simplest two-way encryption using PHP

...ge Example $message = 'Ready your ammunition; we attack at dawn.'; $key = hex2bin('000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f'); $encrypted = UnsafeCrypto::encrypt($message, $key); $decrypted = UnsafeCrypto::decrypt($encrypted, $key); var_dump($encrypted, $decrypted); Demo...
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App Inventor 2 字典代码块 · App Inventor 2 中文网

...列表,是一种将一个值(通常称为键)与另一个值关联的数据结构。 Q:App Inventor 2 什么情况下需要使用字典? A:列表能完成字典的绝大部分功能,不过字典具有比列表更好的查找性能,因此如果要对数据结构执行大量的操作...
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How can I get the iOS 7 default blue color programmatically?

... And if you prefer hex: 0x007aff – Jason Moore Dec 12 '13 at 20:00 ...
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将Linux代码移植到Windows的简单方法 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术

...ndir.h> header file. */ /* #undef HAVE_NDIR_H */ 第二步,调整各种数据类型的定义,可能在linux下面会有很多特殊的数据类型定义,Config.h文件中也包含了一部分可以变动的数据类型定义项。这些定义一般都是基本数据类型的重定义。可...
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如何查看Oracle用户的SQL执行历史记录? - 数据库(内核) - 清泛网 - 专注C/...

...和其他角色的系统权限 select * from dba_tab_privs; 数据库中对象的所有授权 select * from user_role_privs; 查看当前用户的角色 清泛网注:以下内容更详细深入,来源:http://www.cnblogs.com/net2012/archive/2013/01/21/2869636.html...
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Why declare unicode by string in python?

...for ü which is U+00FC. When the byte string was printed, Python sent the hex value 81 to the console directly. When the Unicode string was printed, Python correctly detected my console encoding as cp437 and translated Unicode ü to the cp437 value for ü. Here's what happens with a file declared...
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What is the argument for printf that formats a long?

...ently, when I'm printing 64-bit values, I find it helpful to print them in hex (usually with numbers that big, they are pointers or bit fields). unsigned long long n; printf("0x%016llX", n); // "0x" followed by "0-padded", "16 char wide", "long long", "HEX with 0-9A-F" will print: 0x00000000DEAD...
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浅谈APM在电子交易系统中的应用 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...快速定位应用系统性能故障:通过对应用系统各种组件(数据库、中间件)的监测,迅速定位系统故障,如发生Oracle数据库死锁等问题。 优化系统性能:精确分析系统各个组件占用系统资源情况,中间件、数据库执行效率,根...
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JAVA线程池管理及分布式HADOOP调度框架搭建 - 人工智能(AI) - 清泛IT社区,...

...d类、实现java.lang.Runnable接口。 先看个例子,假设有100个数据需要分发并且计算。看下单线程的处理速度:package thread; import java.util.Vector; public class OneMain { &nbsp; &nbsp;&nbsp; &nbsp; public static void main(String[] args) throws InterruptedExceptio...