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移动前端开发之viewport的深入理解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...桌面浏览器中，window对象有一个devicePixelRatio属性，它的官方的定义为：设备物理像素和设备独立像素的比例，也就是 devicePixelRatio = 物理像素 / 独立像素。css中的px就可以看做是设备的独立像素，所以通过devicePixelRatio，我们可以...
MongoDB与内存 - 大数据 & AI - 清泛网移动版 - 专注C/C++及内核技术
...一部分内存。
关于MongoDB与内存的话题，大家还可以参考官方文档中的相关介绍。
MongoDB 内存
What is the difference between char array and char pointer in C?
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char* and char[] are different types, but it's not immediately apparent in all cases. This is because arrays decay into pointers, meaning that if an expression of type char[] is provided where one of type char* is expected, the compiler automatically converts the array into a pointer to i...
What are forward declarations in C++?
At: http://www.learncpp.com/cpp-tutorial/19-header-files/
8 Answers
8
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谁在争抢UGC - 资讯 - 清泛网 - 专注C/C++及内核技术
...业务，而是一种用户使用互联网的新方式，即由原来的以下载为主变成下载和上传并重。YouTube、MySpace等网站都可以看做是UGC的成功案例，社区网络、视频分享、博客和播客(视频分享)等都是UGC的主要应用形式。
UGC正在成为互联...
A variable modified inside a while loop is not remembered
... answered May 31 '13 at 9:40
P.PP.P
84.8k1414 gold badges129129 silver badges180180 bronze badges
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Is #pragma once part of the C++11 standard?
...e-compiler directives scheme also called macro-guard scheme (see code snippet below).
2 Answers
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C++ error: undefined reference to 'clock_gettime' and 'clock_settime'
...d you use that in a complete example, somehing like g++ -o main -lrt main.cpp does not work for me
– puk
Nov 29 '13 at 10:25
4
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How come an array's address is equal to its value in C?
...you create a pointer, you can then take its address: int *p = array; int **pp = &p;.
– Jerry Coffin
Sep 12 '12 at 14:06
3
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Python multiprocessing PicklingError: Can't pickle
... __name__ == '__main__':
pool = mp.Pool()
foo = Foo()
pool.apply_async(foo.work)
pool.close()
pool.join()
yields an error almost identical to the one you posted:
Exception in thread Thread-2:
Traceback (most recent call last):
File "/usr/lib/python2.7/threading.py", line ...