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Why is processing a sorted array slower than an unsorted array?
...e accessed in memory-order. They have been allocated consecutively in RAM. CPUs love accessing memory sequentially because they can speculatively request the next cache line so it will always be present when needed.
When you are sorting the list you put it into random order because your sort keys a...
Is memcached a dinosaur in comparison to Redis? [closed]
...ation to memcached. Other things are also dated (redis is super fast now, etc), but FYI if you're here five years later...
– dannysauer
Mar 11 '15 at 16:02
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How to convert decimal to hexadecimal in JavaScript
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I am "pulling" numbers from an array ('255,0,55', etc) and the .toString(16) didn't work. All I got were the same numbers! I added the "Number" function to the front, and now it works! Only spent about four hours trying to find the solution!!
– Cristofa...
创建增量同步Oracle物化视图问题 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
创建增量同步Oracle物化视图问题我们采用Oracle的物化视图增量刷新机制定时将数据库A上的某个表的数据同步到另一个数据库B上。我们常用的最简单的实现步骤是这样。首先在数...我们采用Oracle的物化视图增量刷新机制定时将数...
线程访问窗口资源的问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
线程访问窗口资源的问题在开个线程时常为所开的线程传入个窗口参数（cwnd），这里里面有个很大的隐患就是当做CWnd::AssertValid()检查，就会遇到断言失败。具...时常为所开的线程传入个窗口参数 （cwnd），这里里面有个很大的...
“21天教你学会C++” - 创意 - 清泛网 - 专注C/C++及内核技术
...未命中的情况），从磁盘上读取连续的数据要多长时间，定位到磁盘上的新位置又要多长时间。（答案在这里）
尝试参与到一项语言标准化工作中。可以是ANSI C++委员会，也可以是决定自己团队的编码风格到底采用2个空格的缩...
How does a “stack overflow” occur and how do you prevent it?
...9 overwrites memory outside the stack. This might overwrite memory, code, etc.
Many programmers make this mistake by calling function A that then calls function B, that then calls function C, that then calls function A. It might work most of the time, but just once the wrong input will cause it t...
Pointer to pointer clarification
...ay
*ipp = ip2;
The * operator turns a pointer back into a variable. We fetch the value of ipp, which is "pointer to ip1 and turn it into a variable. What variable? ip1 of course!
Therefore this is simply another way of saying
ip1 = ip2;
So we fetch the value of ip2. What is it? "pointer to j...
What is LDAP used for?
...ntain by network administrators. For example you can:
use the same login/passwd to login on an Intranet and on your local computer.
give specific permissions to a group of user. For example some could access some specific page of your Intranet, or some specific directories on a shared drive.
get a...
Asynctask vs Thread in android
...bytes may take a long time, when the server is busy, unreachable (timeout) etc. A fix could be to use AsyncTask with own scheduler.
– xmedeko
Jun 17 '16 at 7:55
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