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Interface vs Base class

...pecifically, quadruped mammals (animals are waaay too general). Let us assume that you have an abstract class Mammal, for both of them: public abstract class Mammal This base class will probably have default methods such as: Feed Mate All of which are behavior that have more or less the same ...
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How do I vertically center text with CSS? [duplicate]

I have a <div> element which contains text and I want to align the contents of this <div> vertically center. ...
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jQuery get specific option tag text

... It's looking for an element with id list which has a property value equal to 2. What you want is the option child of the list: $("#list option[value='2']").text() share ...
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Extracting the last n characters from a ruby string

To get the last n characters from a string, I assumed you could use 8 Answers 8 ...
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How does Zalgo text work?

...on various forums. It's kind of annoying to look at, but it really bothers me because it undermines my notion of what a character is supposed to be. My understanding is that a character is supposed to move horizontally across a line and stay within a certain "container". Obviously the Zalgo text is ...
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jQuery date/time picker [closed]

...looking around for a decent jQuery plugin that can handle both dates and times. The core UI DatePicker is great, but unfortunately I need to be able to take time in as well. ...
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Can I add jars to maven 2 build classpath without installing them?

Maven2 is driving me crazy during the experimentation / quick and dirty mock-up phase of development. 24 Answers ...
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How to return a result (startActivityForResult) from a TabHost Activity?

...ending several hours and downloading the Android sources, I have finally come to a solution. If you look at the Activity class, you will see, that finish() method only sends back the result if there is a mParent property set to null. Otherwise the result is lost. public void finish() { if (mPa...
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How to permanently add a private key with ssh-add on Ubuntu? [closed]

...ply: nano ~/.ssh/config ...and enter the lines above as per your requirements. For this to work the file needs to have chmod 600. You can use the command chmod 600 ~/.ssh/config. If you want all users on the computer to use the key put these lines into /etc/ssh/ssh_config and the key in a folde...
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Where can I learn how to write C code to speed up slow R functions? [closed]

...very efficient) C code one can study, and CRAN has hundreds of packages, some from authors you trust. That provides real, tested examples to study and adapt. But as Josh suspected, I lean more towards C++ and hence Rcpp. It also has plenty of examples. Edit: There were two books I found helpful: ...