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Explain which gitignore rule is ignoring my file

Is there any way to see why some file is getting ignored by git (i.e. which rule in a .gitignore file is causing the file to be ignored)? ...
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How to navigate through a vector using iterators? (C++)

... the [] operator or the "at" method. From what I understand, iterators can be used to navigate through containers, but I've never used iterators before, and what I'm reading is confusing. ...
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Read an Excel file directly from a R script

... Perl installed on your system -- usually already true on MacOS and Linux, but takes an extra step on Windows, i.e. see http://strawberryperl.com/). There are various caveats, and alternatives, listed on the R wiki page. The only reason I see not to do this directly is that you may want to examine ...
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What does pylint's “Too few public methods” message mean

I'm running pylint on some code, and receiving the error "Too few public methods (0/2)". What does this message mean? The pylint docs are not helpful: ...
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application/x-www-form-urlencoded or multipart/form-data?

...n/x-www-form-urlencoded and multipart/form-data . I understand that most browsers are only able to upload files if multipart/form-data is used. Is there any additional guidance when to use one of the encoding types in an API context (no browser involved)? This might e.g. be based on: ...
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What are the differences between delegates and events?

What are the differences between delegates and an events? Don't both hold references to functions that can be executed? 12 ...
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When should we use mutex and when should we use semaphore

... Here is how I remember when to use what - Semaphore: Use a semaphore when you (thread) want to sleep till some other thread tells you to wake up. Semaphore 'down' happens in one thread (producer) and semaphore 'up' (for same semaphore) happen...
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Why does Git say my master branch is “already up to date” even though it is not?

... I think your basic issue here is that you're misinterpreting and/or misunderstanding what git does and why it does it. When you clone some other repository, git makes a copy of whatever is "over there". It also takes "their" branch labe...
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Short description of the scoping rules?

...olution, from Learning Python, 3rd. Ed.. (These rules are specific to variable names, not attributes. If you reference it without a period, these rules apply.) LEGB Rule Local — Names assigned in any way within a function (def or lambda), and not declared global in that function Enclosing-funct...
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What is a “context bound” in Scala?

One of the new features of Scala 2.8 are context bounds. What is a context bound and where is it useful? 4 Answers ...