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Java compile speed vs Scala compile speed
...Scala 2.8, and I expect the improvements to continue now that the dust has settled on 2.8. This page documents some of the ongoing efforts and ideas to improve the performance of the Scala compiler.
Martin Odersky provides much more detail in his answer.
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How do you create a random string that's suitable for a session ID in PostgreSQL?
... like this, but found when I used it an an UPDATE statement, all rows were set to the same random password instead of unique passwords. I solved this by adding the primary key ID into the formula. I add it to the random value and the subtract it again. The randomness is not changed, but PostgreSQL i...
Regex doesn't work in String.matches()
...ther languages followed suit? From what I know, only C++ has an equivalent set of methods - regex_search and regex_match. In Python, re.match only anchors the match at the start of the string (as if it were \Apattern) and Python 3.x has got a nice .fullmatch() method. In JS, Go, PHP and .NET, the th...
【解决】bufferevent_openssl.c:228:19: error: storage size of \'methods...
【解决】bufferevent_openssl.c:228:19: error: storage size of 'methods_bufferevent' isn't knownxunsearch 升级 安装的时候报 libevent 编译错误：bufferevent_openssl c:228:19: error: storage size of & 39;methods_bufferevent& 39; isn& 39;t knownstatic BIO_ xunsearch 升级/安装的时...
C语言面试那些事儿──一道指针与数组问题 - c++1y / stl - 清泛IT社区，为创新赋能！
首先看如下代码：
int main(int argc, char** argv)
{
int a[5] = {1,2,3,4,5};
int* ptr = (int*)(&a + 1);
printf("%d,%d\n", *(a+1), *(ptr-1));
return 0;
}这道题在很多所谓经典C语言面试题里是常见的不能再...
C++11 rvalues and move semantics confusion (return statement)
I'm trying to understand rvalue references and move semantics of C++11.
6 Answers
6
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Where does 'Hello world' come from?
...xample for any programming language. I've always wondered where this sentence came from and where was it first used.
7 Answ...
MFC中ComboBox控件的使用 - C/C++ - 清泛网 - 专注C/C++及内核技术
MFC中ComboBox控件的使用一、如何添加 删除Combo Box内容1，在ComboBox控件属性的Data标签里面添加，一行表示ComboBox下拉列表中的一行。换行用ctrl+回车。2，在程...一、如何添加/删除Combo Box内容
1，在ComboBox控件属性的Data标签里面添...
三个退出程序消息：WM_CLOSE、WM_DESTROY、WM_QUIT区别 - C/C++ - 清泛网 -...
三个退出程序消息：WM_CLOSE、WM_DESTROY、WM_QUIT区别1、发送消息SendMessage、PostMessagePostMessage将消息放入消息队列后马上返回，而SendMessage直到窗口过程处理完消息后才返回2、三个消息...1、发送消息SendMessage、PostMessage
PostMessage将消...
Short form for Java if statement
... multi user system with a mutable city, there could be an intervening city.setName(null). Your answer neatly handles that.
– emory
Jan 17 '12 at 18:14
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