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Difference between Observer, Pub/Sub, and Data Binding
What is the difference between the Observer Pattern , Publish/Subscribe , and Data Binding ?
4 Answers
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Why does the C# compiler not fault code where a static method calls an instance method?
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How to install Java SDK on CentOS?
I have CentOS 5, but I don't know the steps to install Java SDK on Linux.
12 Answers
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How to rsync only a specific list of files?
I've about 50 or so files in various sub-directories that I'd like to push to a remote server. I figured rsync would be able to do this for me using the --include-from option. Without the --exclude="*" option, all the files in the directory are being synced, with the option, no files are.
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How to only get file name with Linux 'find'?
I'm using find to all files in directory, so I get a list of paths. However, I need only file names. i.e. I get ./dir1/dir2/file.txt and I want to get file.txt
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what is the difference between a portlet and a servlet?
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dplyr summarise: Equivalent of “.drop=FALSE” to keep groups with zero length in output
...function, empty categories are dropped by default. You can change this behavior by adding .drop = FALSE . However, this doesn't work when using summarise with dplyr . Is there another way to keep empty categories in the result?
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How do I quickly rename a MySQL database (change schema name)?
The MySQL manual at MySQL covers this.
48 Answers
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Why XML-Serializable class need a parameterless constructor
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Find the PID of a process that uses a port on Windows
My service crash on startup with the classic:
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