My question is part of this problem: 14 Answers 14 ...

...erformance improvements are always coming, so you're probably wasting your time if you're tuning an old version. For example, PostgreSQL 9.2 significantly improves the speed of TRUNCATE and of course adds index-only scans. Even minor releases should always be followed; see the version policy. Don't...

... For scrolling downwards Use j or ↓ to move down one line at a time d to move by half the page screen f to move by a whole page screen For scrolling upwards use k or ↑ to move up one line at a time u to move by half the page screen b to move by a whole page screen press q to quit out...

In my String, I can have an arbitrary number of words which are comma separated. I wanted each word added into an ArrayList. E.g.: ...

...ject (e.g. lines starting with app/... if you are using Rails). 99% of the time the problem is with your own code. To illustrate why interpreting in this order is important... E.g. a Ruby error message that confuses many beginners: You execute code that at some point executes as such: @foo = F...

I'm in a computer systems course and have been struggling , in part, with Two's Complement . I want to understand it but everything I've read hasn't brought the picture together for me. I've read the wikipedia article and various other articles, including my text book . ...

...lling Maven on a 64-bit Mac running Mac OSX 'Mavericks' save yourself some time and some hair pulling trying to get Maven installed. I was trying to follow this (which failed because the location of the java_home has changed on Mavericks: http://maven.apache.org/download.cgi I was pulling my hair ...

...所中阅读。 TCP的RTT算法 从前面的TCP重传机制我们知道Timeout的设置对于重传非常重要。 设长了，重发就慢，丢了老半天才重发，没有效率，性能差； 设短了，会导致可能并没有丢就重发。于是重发的就快，会增加网络拥塞...

I need to cast only 1 char to string . The opposite way is pretty simple like str[0] . 2 Answers ...

...六进制整数0f(0F) e.g. 0x1234 %p 指针 %s 字符串 %S Unicode字符串（双字节） %% "%" 2．标志 左对齐："-" e.g. "%-20s" 右对齐："+" e.g. "%+20s" 空格：若符号为正...