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How to avoid warning when introducing NAs by coercion

I generally prefer to code R so that I don't get warnings, but I don't know how to avoid getting a warning when using as.numeric to convert a character vector. ...
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Difference Between ViewResult() and ActionResult()

What is the difference between ViewResult() and ActionResult() in ASP.NET MVC? 8 Answers ...
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What is the difference between `-fpic` and `-fPIC` gcc parameters?

I've already read the gcc manpage, but I still can't understand the difference between -fpic and -fPIC . Can someone explain it, in a very simple and clear way? ...
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When vectors are allocated, do they use memory on the heap or the stack?

Are all of the following statements true? 5 Answers 5 ...
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How to easily truncate an array with JavaScript?

Linq has a convenient operator method called Take() to return a given number of elements in anything that implements IEnumerable . Is there anything similar in jQuery for working with arrays? ...
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“sending 'const NSString *' to parameter of type 'NSString *' discards qualifiers” warning

I have Constants NSString, that I want to call like: 3 Answers 3 ...
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What is the difference between String.slice and String.substring?

Does anyone know what the difference is between these two methods? 8 Answers 8 ...
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Store a closure as a variable in Swift

In Objective-C, you can define a block's input and output, store one of those blocks that's passed in to a method, then use that block later: ...
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UITableView, Separator color where to set?

I have added a UITableView in IB and set the "delegate" and "datasource" and all is working well. What I wanted to do next was change the separator color, but the only way I could find to do this was to add the method to one of the delegate callbacks, is there a better place I should put this? ...
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How do you reindex an array in PHP?

I have the following array, which I would like to reindex so the keys are reversed (ideally starting at 1): 21 Answers ...