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Linux C/C++程序常用的调试手段及异常排查总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...是否可以对职责场景覆盖全面？
代码规范
变量名、函数名、类名是否简单、精准的表达变量的含义？所有变量命名是否可以保持一致性？缩进，换行，可读性如何？
（驼峰、下划线，这个根据公司或者谷歌等的编码规范...
ZeroMQ的学习和研究（PHP代码实例） - C/C++ - 清泛网 - 专注C/C++及内核技术
...();
printf ("Received request: [%s]\n", $request);
// Do some 'work'
sleep (1);
// Send reply back to client
$responder->send ("World");
}
Client 程序如下：
<?php
/*
* Hello World client
* Connects REQ socket to tcp://localhost:5555
* Sends "Hello" to serve...
Multithreading: What is the point of more threads than cores?
...running. Many applications of threads involve some of the threads going to sleep until it's time for them to do something - for instance, user input triggering threads to wake up, do some processing, and go back to sleep.
Essentially, threads are individual tasks that can operate independently of o...
写出高质量代码的10个Tips - 更多技术 - 清泛网 - 专注C/C++及内核技术
...主要还是原生的测试框架不够方便，每跑一次用例需要在模拟器或者真机上运行，效率太低，也不方便在CI环境下自动构建单元测试，好在有Robolectric，能帮我们解决部分问题。
单元测试的一个非常显著的优点是，当你需要修改...
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/...
...
--开启附加日志
alter database add supplemental log data;
--模拟DML操作
conn p_chenming/...
SQL> select * from test2;
SQL> insert into test2 values(7,77);
SQL> commit;
conn / as sysdba
--切归档
SQL> alter system switch logfile;
SQL> select name,dest_id,thread#,sequen...
How to make a Java thread wait for another thread's output?
... call() throws Exception {
print("One...");
Thread.sleep(6000);
print("One!!");
return 100;
}
}
public class Two implements Callable<String> {
public String call() throws Exception {
print("Two...");
...
Difference between WAIT and BLOCKED thread states
...en join() is called.
TIMED_WAITING- when below methods are called:
Thread.sleep
Object.wait with timeout
Thread.join with timeout
TERMINATED- thread returned from run() method.*/
public class ThreadBlockingState{
public static void main(String[] args) throws InterruptedException {
Object obj...
How can I view live MySQL queries?
...ial setup.
SELECT * FROM INFORMATION_SCHEMA.PROCESSLIST WHERE COMMAND != 'Sleep';
The only catch is that you often miss queries which execute very quickly, so it is most useful for longer-running queries or when the MySQL server has queries which are backing up - in my experience this is exactly ...
普通码农和CTO之间的差距，就是这7点了 - 杂谈 - 清泛网 - 专注C/C++及内核技术
...人喜欢用if来不停的判断，看起来就像C语言一样“二”。函数的执行结果并不是很明显，每次都要get一下才能拿到结果。所以我用异常来处理错误，如果出错则抛出“RuntimeException”；函数的执行结果通过函数的返回值返回。
这...
实战低成本服务器搭建千万级数据采集系统 - 更多技术 - 清泛网 - 专注C/C++...
...博的网页搜索，可见即可抓的方式，结合反监控系统模块模拟人的正常行为操作，搜索30万关键词数据，使资源最大化利用。为了保证在一个小时采集到，需要采用分布式多线程模式抓取，并发采集。并发的时候不能从同一个ip...