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Factors in R: more than an annoyance?

One of the basic data types in R is factors. In my experience factors are basically a pain and I never use them. I always convert to characters. I feel oddly like I'm missing something. ...
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Python Requests and persistent sessions

I am using the requests module (version 0.10.0 with Python 2.5). I have figured out how to submit data to a login form on a website and retrieve the session key, but I can't see an obvious way to use this session key in subsequent requests. Can someone fill in the ellipsis in the code below or sug...
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Android image caching

... And now the punchline: use the system cache. URL url = new URL(strUrl); URLConnection connection = url.openConnection(); connection.setUseCaches(true); Object response = connection.getContent(); if (response instanceof Bitmap) { Bitmap bitm...
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In Vim, how do I apply a macro to a set of lines?

I have a file with a bunch of lines. I have recorded a macro that performs an operation on a single line. I want to repeat that macro on all of the remaining lines in the file. Is there a quick way to do this? ...
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How can I merge two hashes without overwritten duplicate keys in Ruby?

Is there an easy or elegant way to merge two hashes without overwriting duplicate keys? 5 Answers ...
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Pass a parameter to a fixture function

I am using py.test to test some DLL code wrapped in a python class MyTester. For validating purpose I need to log some test data during the tests and do more processing afterwards. As I have many test_... files I want to reuse the tester object creation (instance of MyTester) for most of my tests. ...
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How to detect the swipe left or Right in Android?

I have an EditText view in android. On this I want to detect swipe left or right. I am able to get it on an empty space using the code below. But this does not work when I swipe on an EditText . How do I do that? Please let me know If I am doing something wrong. Thank you. ...
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XML schema or DTD for logback.xml?

...ck.xml file to have at least the very basic validation and auto-completion in IDEs like IDEA or Eclipse, but I never saw any solution. ...
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How do I make a reference to a figure in markdown using pandoc?

I'm currently writing a document in markdown and I'd like to make a reference to an image from my text. 6 Answers ...
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Xcode changes unmodified storyboard and XIB files

Storyboards are rather a royal pain from a git workflow perspective when multiple people are collaborating on them. For example, the XML in the .storyboard file has its starting <document> tag's toolsVersion and systemVersion attributes altered by whatever configuration the most recent f...