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Equivalent of “throw” in R

How does one "throw" an error in R? I have a function that takes a data frame and some column names and does stuff with them. If the columns don't exist, I want the function to stop and to stop all functions depending on it. ...
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How to “properly” create a custom object in JavaScript?

I wonder about what the best way is to create an JavaScript object that has properties and methods. 15 Answers ...
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Fastest way to determine if an integer's square root is an integer

I'm looking for the fastest way to determine if a long value is a perfect square (i.e. its square root is another integer): ...
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Add regression line equation and R^2 on graph

I wonder how to add regression line equation and R^2 on the ggplot . My code is: 9 Answers ...
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General suggestions for debugging in R

I get an error when using an R function that I wrote: 13 Answers 13 ...
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Change Image of ImageView programmatically in Android

When I change the image programmatically‎, it shows new image on top of the old image which is set originally in layout file? ...
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Example JavaScript code to parse CSV data

Where could I find some JavaScript code to parse CSV data? 12 Answers 12 ...
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What are the differences between “=” and “

What are the differences between the assignment operators = and <- in R? 7 Answers ...
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Android get color as string value

If i defined a color in resources 11 Answers 11 ...
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What is your preferred style for naming variables in R? [closed]

Which conventions for naming variables and functions do you favor in R code? 9 Answers ...