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How do I make a matrix from a list of vectors in R?
Goal: from a list of vectors of equal length, create a matrix where each vector becomes a row.
6 Answers
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Is there a way to zoom the Visual Studio text editor with a keyboard shortcut?
Yesterday I found myself needing to zoom my Visual Studio text editor and was without a mouse (don't ask). Typically I do this by holding down CTRL and scrolling the mouse wheel. I also couldn't figure out how to tab into the area where you can specify your zoom level in the lower left hand corner...
Running multiple commands in one line in shell
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You are using | (pipe) to direct the output of a command into another command. What you are looking for is && operator to execute the next command only if the previous one succeeded:
cp /templates/apple /templates/used...
How to include a child object's child object in Entity Framework 5
I am using Entity Framework 5 code first and ASP.NET MVC 3 .
4 Answers
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Rails: how do I validate that something is a boolean?
Does rails have a validator like validates_numericality_of for boolean or do I need to roll my own?
5 Answers
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How do you manually execute SQL commands in Ruby On Rails using NuoDB
I'm trying to manually execute SQL commands so I can access procedures in NuoDB.
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How to Diff between local uncommitted changes and origin
...oned a repository and started modifying files. I know that if I have local uncommitted changes, I can do a diff as follows git diff test.txt and it will show me the difference between the current local HEAD and the modified, uncommitted changes in the file. If I commit those changes I can diff it ...
How do I use CMake?
I am trying to use CMake in order to compile opencv.
4 Answers
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RabbitMQ message size and types
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Theoretically anything can be stored/sent as a message. You actually don't want to store anything on the queues. The system works most efficiently if the queues are empty most of the time. You can send anything you want to the queue with two preconditions:
The thing you are send...
Virtualizing an ItemsControl?
I have an ItemsControl containing a list of data that I would like to virtualize, however VirtualizingStackPanel.IsVirtualizing="True" does not seem to work with an ItemsControl .
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