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Android应用内存泄露分析、改善经验总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术

... } } } } IO操作后,没有关闭文件导致的内存泄露,比如Cursor、FileInputStream、FileOutputStream使用完后没有关闭,这种问题在Android Studio 2.0中能够通过静态代码分析检查出来,直接改善就可以了; 自...
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MySQL error: key specification without a key length

...aracters for a single-byte charset like LATIN1 and only 255 characters for UTF8 (MySQL only uses BMP which requires at most 3 bytes per character) If you need your whole column to be the PRIMARY KEY, calculate SHA1 or MD5 hash and use it as a PRIMARY KEY. ...
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libevent对比libev的基准测试 - C/C++ - 清泛网 - 专注C/C++及内核技术

...它使用红黑树来组织计时器和其他类型的双向链表。每个文件描述符或信号最多可以有一个读取和一个写入观察者。它还提供了一个简单的 DNS 解析器和服务器以及 HTTP 服务器和客户端代码,以及一个套接字缓冲抽象。 Libev 概...
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A better similarity ranking algorithm for variable length strings

...s discussion has been really helpful, thanks. I converted the algorithm to VBA for use with Excel and wrote a few versions of a worksheet function, one for simple comparison of a pair of strings, the other for comparing one string to a
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Changing the maximum length of a varchar column?

...le` CHANGE `property` `property` VARCHAR(whatever_you_want) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL; share | improve this answer | follow | ...
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How do I match any character across multiple lines in a regular expression?

...\S] or the JS workarounds (demo): regex rex(R"(([\s\S]*)<FooBar>)"); vba vbscript - Use the same approach as in JavaScript, ([\s\S]*)<Foobar>. (NOTE: The MultiLine property of the RegExp object is sometimes erroneously thought to be the option to allow . match across line breaks, while,...
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VC/Linux C++ 递归访问目录下所有文件 - C/C++ - 清泛网 - 专注C/C++及内核技术

VC/Linux C++ 递归访问目录下所有文件VC函数,部分代码如下:find(char * lpPath){ char szFind[MAX_PATH]; WIN32_FIND_DATA FindFileData; strcpy(sz...VC函数,部分代码如下: find(char * lpPath) { char szFind[MAX_PATH]; WIN32_FIND_DATA FindFileData; ...
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error C2220: 警告被视为错误 - 没有生成“object”文件 - C/C++ - 清泛网 ...

error C2220: 警告被视为错误 - 没有生成“object”文件出现这种编译错误,当然可以取消掉警告视为错误选项(右击属性->配置属性->c c++->常规,将警告视为错误的选项改为否,就可以!),不过还 出现这种编译错误,当然可以取...
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ifstream 线程安全读文件 - C/C++ - 清泛网 - 专注C/C++及内核技术

ifstream 线程安全读文件函数 safeGetline:std::istream& safeGetline(std::istream& is, std::string& t){ t clear(); 使用std::streambuf 函数 safeGetline: std::istream& safeGetline(std::istream& is, std::string& t) { t.clear(); //这比使用std::istream逐个读...
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[解决]MySql提示:The server quit without updating PID file(…)失败 - 数...

...后在处理这个问题!如图所示: [root@rekfan ~]# df 文件系统 1K-块 已用 可用 已用% 挂载点 /dev/mapper/vg_rekfan-lv_root 51606140 47734848 1249852 100% / tmpfs 1953396 88 1953308 1% /dev...