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Replace a value in a data frame based on a conditional (`if`) statement
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Easier to convert nm to characters and then make the change:
junk$nm <- as.character(junk$nm)
junk$nm[junk$nm == "B"] <- "b"
EDIT: And if indeed you need to maintain nm as factors, add this in the end:
junk$nm <- as.factor(junk$nm)
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What does MissingManifestResourceException mean and how to fix it?
...roblem was to right-click the Resources.resx file in the Solution Explorer and click Run Custom Tool. This re-generates the auto-generated Resources.Designer.cs file.
If the .resx file was added to the project manually, the Custom Tool property of the file must be set to "ResXFileCodeGenerator".
T...
How to access command line parameters?
The Rust tutorial does not explain how to take parameters from the command line. fn main() is only shown with an empty parameter list in all examples.
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How can I present a file for download from an MVC controller?
...r present a "Download File" popup with an arbitrary file type, like a PDF, and a filename:
7 Answers
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Pimpl idiom vs Pure virtual class interface
...would make a programmer to choose either Pimpl idiom or pure virtual class and inheritance.
10 Answers
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Delete all documents from index/type without deleting type
...aving custom mappings; do note that the second option will delete the type and its mappings. So don't forget to remap the index type after deleting. Or else you will be messed up.
– Finny Abraham
Sep 15 '15 at 6:14
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Git merge two local branches
I have branch Master , branchA and branchB .
Now I'm working in the branchA and I need to merge branchA with branchB and proceed my work in the branchA . All files are comitted in the branchA and branchB .
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How do I wrap text in a pre tag?
pre tags are super-useful for code blocks in HTML and for debugging output while writing scripts, but how do I make the text word-wrap instead of printing out one long line?
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jQuery UI dialog positioning
...t viewport (in other words, [0, 0] will always put it in the upper left hand corner of your browser window, regardless of where you are currently scrolled to). However, the only way I know to retrieve the location is of the element relative to the ENTIRE page.
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What is “stdafx.h” used for in Visual Studio?
...rocess. Compiling the huge header structures that form part of Windows API and other large API libraries is a very, very long, slow process. To have to do it over, and over, and over for every single Cpp source file is a death knell.
This is not unique to Windows but an old problem faced by all com...