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What does “1 line adds whitespace errors” mean when applying a patch?

I'm editing some markdown files of a cloned remote repository, and wanted to test creating and applying patches from one branch to another. However, every time I make any change at all, I get the following message during git apply : ...
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Summarizing multiple columns with dplyr? [duplicate]

... a bit with the dplyr-syntax. I have a data frame with different variables and one grouping variable. Now I want to calculate the mean for each column within each group, using dplyr in R. ...
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How do I install cURL on cygwin?

I tried to enable curl on cygwin but it says bash: curl: command not found 17 Answers ...
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Difference between Mutable objects and Immutable objects [duplicate]

Any one please give the diff between Mutable objects and Immutable objects with example. 5 Answers ...
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When do I really need to use atomic instead of bool? [duplicate]

...ic by nature" unless it is an std::atomic*-something. That's because the standard says so. In practice, the actual hardware instructions that are emitted to manipulate an std::atomic<bool> may (or may not) be the same as those for an ordinary bool, but being atomic is a larger concept with wi...
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Developing for Android in Eclipse: R.java not regenerating

...sn't contain information about my new resources, so I decided to delete it and thought that Eclipse would generate a new one. But that didn't happen, and I don't have R.java now. How can I regenerate one? ...
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Why C# fails to compare two object types with each other but VB doesn't?

I have two objects in C# and don't know if it's Boolean or any other type. However when I try to compare those C# fails to give the right answer. I have tried the same code with VB.NET and that did it ! ...
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Python matplotlib multiple bars

...lotlib, when I tried to call the bar function multiple times, they overlap and as seen the below figure the highest value red can be seen only. How can I plot the multiple bars with dates on the x-axes? ...
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Why does this loop produce “warning: iteration 3u invokes undefined behavior” and output more than 4

...s no such thing as "unsigned integer overflow") means undefined behaviour. And this means anything can happen, and discussing why does it happen under the rules of C++ doesn't make sense. C++11 draft N3337: §5.4:1 If during the evaluation of an expression, the result is not mathematically de...
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Difference between Rebuild and Clean + Build in Visual Studio

What is the difference between just a Rebuild and doing a Clean + Build in Visual Studio 2008? Is Clean + Build different then doing Clean + Rebuild ? ...