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Android phone orientation overview including compass

I've been trying to get my head around the Android orientation sensors for a while. I thought I understood it. Then I realised I didn't. Now I think (hope) I have a better feeling for it again but I am still not 100%. I will try and explain my patchy understanding of it and hopefully people will be ...
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How to format a Java string with leading zero?

Here is the String, for example: 21 Answers 21 ...
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How is a CRC32 checksum calculated?

Maybe I'm just not seeing it, but CRC32 seems either needlessly complicated, or insufficiently explained anywhere I could find on the web. ...
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How to get the type of a variable in MATLAB?

Does MATLAB have a function/operator that indicates the type of a variable (similar to the typeof operator in JavaScript)? ...
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What characters are valid for JavaScript variable names?

Which characters can be used for naming a JavaScript variable? 12 Answers 12 ...
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adding noise to a signal in python

I want to add some random noise to some 100 bin signal that I am simulating in Python - to make it more realistic. 7 Answer...
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Group by multiple columns in dplyr, using string vector input

I'm trying to transfer my understanding of plyr into dplyr, but I can't figure out how to group by multiple columns. 9 Answ...
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Circle line-segment collision detection algorithm?

I have a line from A to B and a circle positioned at C with the radius R. 27 Answers ...
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Why do people say there is modulo bias when using a random number generator?

I have seen this question asked a lot but never seen a true concrete answer to it. So I am going to post one here which will hopefully help people understand why exactly there is "modulo bias" when using a random number generator, like rand() in C++. ...
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Android emulator-5554 offline

I'm having a problem with emulator-5554, it keeps telling me it is offline. 37 Answers ...