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Relative frequencies / proportions with dplyr

Suppose I want to calculate the proportion of different values within each group. For example, using the mtcars data, how do I calculate the relative frequency of number of gears by am (automatic/manual) in one go with dplyr ? ...
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Adding values to a C# array

Probably a really simple one this - I'm starting out with C# and need to add values to an array, for example: 23 Answers ...
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Converting Mercurial folder to a Git repository

I don't have a huge experience with Mercurial, I'm mostly a Git guy. 9 Answers 9 ...
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Most pythonic way to delete a file which may not exist

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How to append contents of multiple files into one file

I want to copy the contents of five files to one file as is. I tried doing it using cp for each file. But that overwrites the contents copied from the previous file. I also tried ...
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Total width of element (including padding and border) in jQuery

As in the subject, how can one get the total width of an element, including its border and padding, using jQuery? I've got the jQuery dimensions plugin, and running .width() on my 760px-wide , 10px padding DIV returns 760 . ...
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How to match “any character” in regular expression?

The following should be matched: 11 Answers 11 ...
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How can I force a long string without any blank to be wrapped?

I have a long string (a DNA sequence). It does not contain any whitespace character. 13 Answers ...
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How to grant remote access to MySQL for a whole subnet?

I can easily grant access to one IP using this code: 7 Answers 7 ...
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How do I pull from a Git repository through an HTTP proxy?

Note: while the use-case described is about using submodules within a project, the same applies to a normal git clone of a repository over HTTP. ...