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What is the difference between Factory and Strategy patterns?
...ent strategies based on the persistence medium. If your data is stored locally in XML it would use one strategy. If the data were remote in a different database, it would use another.
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Convert data.frame columns from factors to characters
I have a data frame. Let's call him bob :
18 Answers
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Is it possible to dynamically compile and execute C# code fragments?
...gments to a text file (or any input stream), and then execute those dynamically? Assuming what is provided to me would compile fine within any Main() block, is it possible to compile and/or execute this code? I would prefer to compile it for performance reasons.
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Programming with white text on black background?
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It's actually white on black, or rather green or amber on black, that is the traditional way. I've used them all. :)
I believe that the use of black on white started in word processors, because it's a lot easier on your eyes when you...
using facebook sdk in Android studio
...h was written for earlier versions of both). If you're running the latest, all you need to do is this:
Download the Facebook SDK from https://developers.facebook.com/docs/android/
Unzip the archive
In Android Studio 0.5.5 or later, choose "Import Module" from the File menu.
In the wizard, set the ...
Self-references in object literals / initializers
...some kind of one time initialization of the object.
Note that you are actually assigning the return value of init() to foo, therefore you have to return this.
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How to unit test abstract classes: extend with stubs?
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Write a Mock object and use them just for testing. They usually are very very very minimal (inherit from the abstract class) and not more.Then, in your Unit Test you can call the abstract method you want to test.
You should test abstract class that contain some logic like all other ...
What is the difference between RDF and OWL? [closed]
...erence between RDF and OWL. Is OWL an extension of RDF or these two are totally different technologies?
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Javascript switch vs. if…else if…else
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Answering in generalities:
Yes, usually.
See More Info Here
Yes, because each has a different JS processing engine, however, in running a test on the site below, the switch always out performed the if, elseif on a large number of iterations.
Test site
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Order of serialized fields using JSON.NET
...etting the order to 1 will only work if you set an order greater than 1 on all other properties. By default any property without an Order setting will be given an order of -1. So you must either give all serialized properties and order, or set your first item to -2
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