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Which C++ idioms are deprecated in C++11?
With the new standard, there are new ways of doing things, and many are nicer than the old ways, but the old way is still fine. It's also clear that the new standard doesn't officially deprecate very much, for backward compatibility reasons. So the question that remains is:
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Mean per group in a data.frame [duplicate]
I have a data.frame and I need to calculate the mean per group (i.e. per Month , below).
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Group by multiple columns in dplyr, using string vector input
I'm trying to transfer my understanding of plyr into dplyr, but I can't figure out how to group by multiple columns.
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Can't compare naive and aware datetime.now()
I am trying to compare the current date and time with dates and times specified in models using comparison operators:
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What does “|=” mean? (pipe equal operator)
I tried searching using Google Search and Stack Overflow, but it didn't show up any results. I have seen this in opensource library code:
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使用CSplitterWnd实现拆分窗口（多视图显示） - C/C++ - 清泛网 - 专注C/C++及内核技术
使用CSplitterWnd实现拆分窗口（多视图显示）MFC支持两种类型的拆分窗口：静态的和动态的。静态拆分窗口的行列数在拆分窗口被创建时就设置好了，用户不能更改。但是用户可以缩放各行各...MFC支持两种类型的拆分窗口：静态的...
How to create GUID / UUID?
I'm trying to create globally-unique identifiers in JavaScript. I'm not sure what routines are available on all browsers, how "random" and seeded the built-in random number generator is, etc.
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How to swap the buffers in 2 windows emacs
I am using emacs I find that sometimes I have 2 files separated into 2 windows.
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How to get a subset of a javascript object's properties
Say I have an object:
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How can I get the list of files in a directory using C or C++?
How can I determine the list of files in a directory from inside my C or C++ code?
26 Answers
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