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Purpose of memory alignment
...eviously is alignment on cache lines which are (for example, on some CPUs) 64B.
For more info on how much performance can be gained by leveraging caches, take a look at Gallery of Processor Cache Effects; from this question on cache-line sizes
Understanding of cache lines can be important for c...
Convert NSData to String?
...);
You can use an online converter to convert your binary data into base 64 (http://tomeko.net/online_tools/hex_to_base64.php?lang=en) and compare it to the private key in your cert file after using the following command and checking the output of mypkey.pem:
openssl pkcs12 -in myCert.p12 -nocert...
Unable to execute dex: GC overhead limit exceeded in Eclipse
... @MuhammadRiyaz It depends on your OS and whether you're using a 32-bit or 64-bit JVM. If you're on a 64 bit JVM, you can safely set it to anything smaller than your RAM size minus overhead for OS/other applications. On a 32 bit VM, you'll want to keep it smaller than about 1500M (on Linux) or 110...
Strings in a DataFrame, but dtype is object
...ndarray. Every element in a ndarray must has the same size in byte. For int64 and float64, they are 8 bytes. But for strings, the length of the string is not fixed. So instead of save the bytes of strings in the ndarray directly, Pandas use object ndarray, which save pointers to objects, because of ...
Eclipse Android Plugin — libncurses.so.5
...ghtily with installing ADT (Android Dev Tools) on Eclipse in Fedora 16 OS, 64-bit.
7 Answers
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10 条真心有趣的 Linux 命令 - 创意 - 清泛网 - 专注C/C++及内核技术
10 条真心有趣的 Linux 命令在终端工作是一件很有趣的事情。今天，我们将会列举一些有趣得为你带来欢笑的Linux命令。1.rev创建一个文件，在文件里面输入几个单词，rev...
在终端工作是一件很有趣的事情。今天，我们将会列举...
CMap用法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...就需要使用CMap类来简化你的代码，提高你的效率。CMap就是对Hash表的一种实现。先上实例：
int _tmain(int argc, char* argv[])
{
//定义
typedef CMap<int, int, CString, CString> CMapInt;
CMapInt map;
//添加key，val
map.SetAt(1, "str1");
map.SetAt(...
选中CListCtrl指定行并发送LVN_ITEMCHANGED消息 - C/C++ - 清泛网 - 专注C/C++及内核技术
...我们需要向CListCtrl控件发送LVN_ITEMCHANGED消息，LVN_ITEMCHANGED是CListCtrl的WM_NOTIFY消息，其消息映射形式为ON_NOTIFY(TCN_SELCHANGE, IDC_TAB, &CWorkAidDlg::OnTcnSelchangeTab)，向指定控件发送WM_NOTIFY消息是一件比较麻烦的事情，该程序实现的 完整代...
MFC OnKeyDown没反应，不响应键盘操作 - C/C++ - 清泛网 - 专注C/C++及内核技术
...反应，不响应键盘操作在MFC中添加键盘的消息响应，通常是通过OnKeyDown函数来完成消息的捕捉和响应。afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, U...在MFC中添加键盘的消息响应，通常是通过OnKeyDown函数来完成消息的捕捉和响应。
afx...
MFC中MDI消息处理流程 - C/C++ - 清泛网 - 专注C/C++及内核技术
MFC中MDI消息处理流程在MFC中，消息是通过一个向上递交的方式进行处理，例如一个WM_COMMAND消息的处理流程可能为：1) MDI主窗口(CMDIFrameWnd)收到命令消息WM_C...在MFC中，消息是通过一个向上递交的方式进行处理，例如一个WM_COMMAND消...