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cartesian product in pandas
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This won't win a code golf competition, and borrows from the previous answers - but clearly shows how the key is added, and how the join works. This creates 2 new data frames from lists, then adds the key to do the cartesian product on....
Why is Visual Studio 2013 very slow?
I'm running Visual Studio 2013 Pro (RTM version) on my formatted PC (Windows 8.1 fresh install).
31 Answers
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泡在Stack Overflow答题30天 - 创意 - 清泛网 - 专注C/C++及内核技术
泡在Stack Overflow答题30天想法的萌芽如果非要总结下我多年来是如何使用Stack Overflow的话，我的答案就是：打开网页，搜索问题，查看Stack Overflow的搜索结果，参...想法的萌芽
如果非要总结下我多年来是如何使用Stack Overflow的话，...
JavaScript query string [closed]
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This is not a win. What if a key's value has the '=' character in it? E.g. dork.com/?equation=10=2. You could argue it SHOULD be URL-encoded but it sure doesn't have to be. I made the mistake of writing a naive function like this myself on...
Should I use Python 32bit or Python 64bit
I have a win7 64bit installation. Must I use Python 64bit? What are the differences between the 32bit and 64bit Python versions anyway? Do different Python packages (such as south, django, mysqldb etc) support only 32bit/64bit?
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CSS display: table min-height not working
...ks and min-height doesn't in Chrome 37, Safari 7 and FF 32 on mac. IE11 on Win 8.1 gives the correct behavior in both. jsfiddle.net/nuwcyvwn/1
– Stephan Muller
Sep 23 '14 at 11:54
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界面布局组件 · App Inventor 2 中文网
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水平布局
使用水平布局组件来展示一组从左到右排列的组件，你可以在其中从左到右放置应该显示的组件。如果你想让组件显示在另一个上面，使用 垂直布局 代替。
在水平布局中，组件沿水平轴排列，垂直居中对齐。
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JRE 1.7 - java version - returns: java/lang/NoClassDefFoundError: java/lang/Object
... run unpack200 on all .pack files in the JRE's lib/ and lib/ext/ folders.
Windows
To unpack one .pack file (for example rt.pack), run:
"%JAVA_HOME%\bin\unpack200" -r -v rt.pack rt.jar
To recursively unpack all .pack files, from the JRE root run:
for /r %f in (*.pack) do "%JAVA_HOME%\bin\unpack...
故乡的冬日 - 杂谈 - 清泛网 - 专注C/C++及内核技术
故乡的冬日【故乡的冬日】傍晚，昏黄的天空飘下零星的雪花，街灯黄晕的光中，精灵一般纷飞的雪花仿佛将人带入一个童话世界。傍晚，昏黄的天空飘下零星的雪花，街灯黄晕的光中，精灵一般纷飞的雪花仿佛将人带入一个童...
快速开发CSS的利器LESS 系列教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
快速开发CSS的利器LESS 系列教程阅读目录1.快速开发CSS的利器 - 初识less2.快速开发CSS的利器 - less 混入3.快速开发CSS的利器 - less 嵌套规则4.快速开发CSS的利...阅读目录
1.快速开发CSS的利器 - 初识less
2.快速开发CSS的利器 - less 混入
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