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Dynamically select data frame columns using $ and a character value
...ariable from mtcars using a dynamic subset of cols , nether of these work
8 Answers
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LINQ Distinct operator, ignore case?
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Marc Gravell♦Marc Gravell
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实战Nginx与PHP（FastCGI）的安装、配置与优化 - 更多技术 - 清泛网 - 专注...
...优异的一些端倪，因为nginx做的更加专注，只做好异步socket服务器这样的容器，其他的动态部分交给各自的语言通过server的形式去做就ok了（ps:语言与语言之间存在一个万能的socket），内容如下：
一、什么是 FastCGI
FastCGI是一个...
Quick and easy file dialog in Python?
...riendly, especially because the user can't copy/paste the path. I would like a quick and easy way to present a file selection dialog to the user, they can select the file, and then it's loaded to the database. (In my use case, if they happened to chose the wrong file, it would fail parsing, and wo...
How do i find out what all symbols are exported from a shared object?
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bdesham
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answered Aug 9 '09 at 4:17
Employed RussianEm...
How to delete a cookie?
Is my function of creating a cookie correct? How do I delete the cookie at the beginning of my program? is there a simple coding?
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Why is creating a Thread said to be expensive?
... expensive? What exactly is happening when a Java Thread is created that makes its creation expensive? I'm taking the statement as true, but I'm just interested in mechanics of Thread creation in JVM.
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How to read/write a boolean when implementing the Parcelable interface?
I'm trying to make an ArrayList Parcelable in order to pass to an activity a list of custom object. I start writing a myObjectList class which extends ArrayList<myObject> and implement Parcelable .
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How to use mod operator in bash?
I'm trying a line like this:
4 Answers
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Difference between UIViewContentModeScaleAspectFit and UIViewContentModeScaleToFill?
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If you are talking about UIViewContentMode, the following is from the Doc.
UIViewContentModeScaleToFill
Scales the content to fit the size of itself by changing the aspect ratio of the content if necessary.
UIViewContentModeScaleA...