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__attribute__ - C/C++ - 清泛网 - 专注C/C++及内核技术
...用一个带有相同参数值的函数，具体如下：
extern int square(int n) __attribute__ ((const));...
for (i = 0; i < 100; i++ )
{
total += square (5) + i;
}
通过添加__attribute__((const))声明，编译器只调用了函数一次，以后只是直接...
String literals and escape characters in postgresql
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Note that on PostgreSQL 9.0 E'testing\\x20double-slash' will evaluate as 'testing\\x20double-slash', so only single-slash approach works for E'string' style literals
– Alexander
Aug 14 '12 at 14:02
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How to measure time in milliseconds using ANSI C?
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Doesn't this measure cpu time and not wall time?
– krs013
Feb 1 '15 at 4:53
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Understanding recursion [closed]
...A binary tree is a tree made of nodes that have exactly two children, typically called "left" and "right"; again the children can be nodes, or null. A root is a node that is not the child of any other node.
Imagine that a node, in addition to its children, has a value, a number, and imagine that we...
Purpose of ESI & EDI registers?
...hat matches some search criterion (I'm not sure if it's only searching on equality, or what – you can look it up :) )
That's most of what those regs are for.
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Stopping scripters from slamming your website
...r technologies. I work closely with the developers and have talked through all of the answers here (and many other ideas we've had).
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What is private bytes, virtual bytes, working set?
...se values are a reliable indicator of how much memory an executable is actually using, and none of them are really appropriate for debugging a memory leak.
Private Bytes refer to the amount of memory that the process executable has asked for - not necessarily the amount it is actually using. They ...
How does facebook, gmail send the real time notification?
...ever, this can be pretty network intensive, and you often make pointless requests, because nothing has happened.
The way Facebook does it is using the comet approach, rather than polling on an interval, as soon as one poll completes, it issues another one. However, each request to the script on th...
Static function variables in Swift
...the natural evolution of programming. Trying to code in old fashion ways requires hacks. In my opinion, adding an extra nested data type as opposed to utilising variable capturing reduces code readability.
– nstein
Jul 25 '16 at 12:07
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How to integrate nodeJS + Socket.IO and PHP?
...our project, like realtime notifications, chat, ... And you want to manage all the other stuff with PHP, because it is probably more easy for you (and you can take advantage of the existing frameworks, like CodeIgniter or Symfony).
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