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Storing SHA1 hash values in MySQL

...); With million of records binary(20) takes 44.56M, while char(40) takes 64.57M. InnoDB engine. share | improve this answer | follow | ...
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What is the use case of noop [:] in bash?

...s 'SO- stop being evil'Gilles 'SO- stop being evil' 87.9k2424 gold badges184184 silver badges224224 bronze badges ...
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How do I add an existing directory tree to a project in Visual Studio?

... This does not work in my installation of VS 2010 on Vista Ultimate 64 bit. – John Melville Apr 6 '11 at 3:14 13 ...
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How to test if parameters exist in rails

... 87 I am a fan of params[:one].present? Just because it keeps the params[sym] form so it's easie...
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How to set gradle home while importing existing project in Android studio

... | edited Jan 8 '15 at 17:46 Taifun 5,8041313 gold badges5151 silver badges171171 bronze badges answered...
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char类型移动跨平台踩过的坑 - C/C++ - 清泛网 - 专注IT技能提升

...符号处理的,但是在ARM32下被当成了无符号导致问题,ARM64正常有符号。经调查,在PC上,char类型默认为signed-char,但是在一些嵌入式设备 char强转int时,发现在x86平台下是按照有符号处理的,但是在ARM32下被当成了无符号导致问...
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Python学习之Jupyter Notebook和highchart安装 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

Python学习之Jupyter Notebook和highchart安装运行环境Win7 64位 + Python3 5 2一、安装网页端编译器Jupyter Notebook在cmd输入pip3 install jupyter在cmd输入jupyter notebook, 运行环境 Win7 64位 + Python3.5.2 一、安装网页端编译器Jupyter Notebook 在cm...
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启动 Eclipse 弹出“Failed to load the JNI shared library jvm.dll” - ...

...ipse的版本与jre或者jdk版本不一致 对策:要么两者都安装64位的,要么都安装32位的,不能一个是32位一个是64位。 原因2的概率更大一些,原因1不太可能发生。 Eclipse JNI
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微软Win7/Win8自带 tsmmc.msc 远程桌面管理工具(多账号的mstsc远程桌面) ...

... 32位版: http://download.microsoft.com/do ... -x86-RefreshPkg.msu 64位版: http://download.microsoft.com/do ... -x64-RefreshPkg.msu 安装方法: 下载安装后,在控制面板运行“打开或关闭Windows功能”,钩选“远程服务器管理工具->角色管理工具->...
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char类型移动跨平台踩过的坑 - C/C++ - 清泛网 - 专注IT技能提升

...符号处理的,但是在ARM32下被当成了无符号导致问题,ARM64正常有符号。经调查,在PC上,char类型默认为signed-char,但是在一些嵌入式设备 char强转int时,发现在x86平台下是按照有符号处理的,但是在ARM32下被当成了无符号导致问...