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jemalloc 接入方法:提高内存使用效率解决内存泄漏 - C/C++ - 清泛网 - 专...

...jemalloc 介绍及编译步骤本文直接略过,仅记录一下C++程序如何接入jemalloc,以及如何确认jemalloc已载入。注:jemalloc是非侵入式的,目标程序无需依赖jemalloc库,只需要在目标 jemalloc 介绍及编译步骤本文直接略过,仅记录一下C++...
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App Inventor 2 计时器(Clock)详细用法示例 · App Inventor 2 中文网

...返回的当前时刻格式化成文本: 24小时格式怎么写? 如何定时一小时? 如何定点执行,比如到20:23分执行? « 返回首页 计时器在界面设计中的哪里? 计时器怎么启动? 默认计时器是自动启用的,也可程序控制它的属...
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MySQL string replace

... http://www.example.com/articles/news/43 http://www.electrictoolbox.com/mysql-find-replace-text/ share | improve this answer | follow | ...
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MySql: Tinyint (2) vs tinyint(1) - what is the difference?

I knew boolean in mysql as tinyint (1) . 4 Answers 4 ...
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“INSERT IGNORE” vs “INSERT … ON DUPLICATE KEY UPDATE”

... but the values you insert don't map to a partition. If you use REPLACE, MySQL actually does a DELETE followed by an INSERT internally, which has some unexpected side effects: A new auto-increment ID is allocated. Dependent rows with foreign keys may be deleted (if you use cascading foreign ke...
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Cast int to varchar

... @JonathanSayce I'm not overly familiar with the ins & outs of MySQL and it might not use something arbitrary, but I wouldn't rely on the MySQL engine to be that smart (no offense to MySQL). In order to be sure you get the proper length, I would always explicitly provide one. ...
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Installing specific package versions with pip

I'm trying to install version 1.2.2 of the MySQL_python adaptor, using a fresh virtualenv created with the --no-site-packages option. The current version shown in PyPi is 1.2.3 . Is there a way to install the older version? I found an article stating that this should do it: ...
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智能手机图形解锁有多少种可能 - 创意 - 清泛网 - 专注C/C++及内核技术

...这个人的个人网站也不错,http://www.matrix67.com/ Android 的密码是 3 × 3 点阵中的一条路径,这条路径可以交叉,可以“走日字”,几乎是无所不能(只要不经过重复点),但却有一个例外:路径不允许跳过途中必须要经过的点...
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Linux编程中各种头文件 - C/C++ - 清泛网 - 专注C/C++及内核技术

...h> #include <fcntl.h> #include <fcntl.h> 涉及到用户权限及密码验证问题时加入如下语句: #include <shadow.h> #include <crypt.h> #include <pwd.h> 需要注意的是,应该在编译时链接加密算法库,即增加编译选项: -lcrypt 涉及到文件...
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git使用代理服务器,提升git速度 - 开源 & Github - 清泛网 - 专注C/C++及内核技术

...要鉴权的代理设置,如果需要鉴权,可能需要添加用户名密码信息: git config http.proxy http://username:password@127.0.0.1:8088 如果git的所有项目都需要启用代理,那么可以直接启用全局设置: git config --global http.proxy http://127.0.0.1:8088...