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Check for installed packages before running install.packages() [duplicate]
I have an R script that is shared with several users on different computers. One of its lines contains the install.packages("xtable") command.
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How do I edit an existing tag message in git?
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What is the Linux equivalent to DOS pause?
I have a Bash shell script in which I would like to pause execution until the user presses a key. In DOS, this is easily accomplished with the "pause" command. Is there a Linux equivalent I can use in my script?
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How do you create a random string that's suitable for a session ID in PostgreSQL?
I'd like to make a random string for use in session verification using PostgreSQL. I know I can get a random number with SELECT random() , so I tried SELECT md5(random()) , but that doesn't work. How can I do this?
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ASP.NET MVC View Engine Comparison
I've been searching on SO & Google for a breakdown of the various View Engines available for ASP.NET MVC, but haven't found much more than simple high-level descriptions of what a view engine is.
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Force “git push” to overwrite remote files
I want to push my local files, and have them on a remote repo, without having to deal with merge conflicts. I just want my local version to have priority over the remote one.
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How to combine paths in Java?
Is there a Java equivalent for System.IO.Path.Combine() in C#/.NET? Or any code to accomplish this?
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Android Writing Logs to text File
I'm Trying to Write Logs to Custom Log.txt File on Android File using this code of Mine but then this method creates file but contains nothing. Basically I want to read previous contents of the file and then append my data with the existing content.
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Changing all files' extensions in a folder with one command on Windows
How can I use the Windows command line to change the extensions of thousands of files to *****.jpg ?
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Is it bad to have my virtualenv directory inside my git repository?
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