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Is [UIScreen mainScreen].bounds.size becoming orientation-dependent in iOS8?

...: "View Controller Advancements in iOS 8" Quote from the presentation: UIScreen is now interface oriented: [UIScreen bounds] now interface-oriented [UIScreen applicationFrame] now interface-oriented Status bar frame notifications are interface-oriented Keyboard frame notifications are interface-...
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内存优化总结:ptmalloc、tcmalloc和jemalloc - 操作系统(内核) - 清泛网 - ...

... ptmalloc原理 系统调用接口 上图是 x86_64 下 Linux 进程的默认地址空间, 对 heap 的操作, 操作系统提供了brk()系统调用,设置了Heap的上边界; 对 mmap 映射区域的操作,操作系 统 供了 mmap()和 munmap()函数。 因为系统调用的代价很高...
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OceanBase使用libeasy原理源码分析:服务器端 - 数据库(内核) - 清泛网 - ...

...nn_list_node; // file description // default_message_len 默认是16, 大小是8KB, first_message_len默认是2, 大小是1KB // libeasy对于每个连接收数据的时候,如果上次对于这个连接已经收到了1个或者n个完整的包(easy_request_t对应于...
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搭建高可用mongodb集群(二)—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...

...laveOk=false", "code" : 13435 } at src/mongo/shell/query.js:128 #mongodb默认是从主节点读写数据的,副本节点上不允许读,需要设置副本节点可以读。 repset:SECONDARY> db.getMongo().setSlaveOk(); #可以看到数据已经复制到了副本集。 repset:SECONDARY>...
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How to check an Android device is HDPI screen or MDPI screen?

... Density values described at: developer.android.com/guide/practices/screens_support.html – esilver Jan 21 '14 at 21:52 1 ...
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How can I get the current screen orientation?

...onConfigurationChanged() may crash. User will use this code to get current screen orientation. public int getScreenOrientation() { Display getOrient = getActivity().getWindowManager().getDefaultDisplay(); int orientation = Configuration.ORIENTATION_UNDEFINED; if(getOrient.getWidth()==g...
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Why is printing to stdout so slow? Can it be sped up?

...can it be that writing to physical disk is WAY faster than writing to the "screen" (presumably an all-RAM op), and is effectively as fast as simply dumping to the garbage with /dev/null? Congratulations, you have just discovered the importance of I/O buffering. :-) The disk appears to be faster, ...
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CListCtrl 如何设置单元格颜色? - C/C++ - 清泛网 - 专注C/C++及内核技术

CListCtrl 如何设置单元格颜色?CListCtrl默认可设置的内容很少,如单元格颜色默认无法设置。若想设置单元格颜色,需要对CListCtrl进行拓展,已有老外为我们写好demo,这里...CListCtrl默认可设置的内容很少,如单元格颜色默认无法...
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MFC非客户区完美自绘(标题栏,边框,标题按钮)例子 - C/C++ - 清泛网 - 专...

...是很多初学者最苦恼的问题,目前网上的例子要么是系统默认的标题按钮时不时的会重现出来,要么是影响了窗口非客户区原来默认的行... 标题栏自绘是很多初学者最苦恼的问题,目前网上的例子要么是系统默认的标题按钮...
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解决:CStatic控件单击STN_CLICKED消息没反应 - C/C++ - 清泛网 - 专注C/C++及内核技术

...atic控件的Notify属性(即SS_NOTIFY风格),将其改成TRUE就OK了,默认的属性为FASLE,即静态文本控件在默认情况下是不发送通告消息的...修改CStatic控件的Notify属性(即SS_NOTIFY风格),将其改成TRUE就OK了,默认的属性为FASLE,即静态文本控...