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Converting newline formatting from Mac to Windows

...In conclusion, simply replace every occurence of \n by \r\n. Both unix2dos and dos2unix are not by default available on Mac OSX. Fortunately, you can simply use Perl or sed to do the job: sed -e 's/$/\r/' inputfile > outputfile # UNIX to DOS (adding CRs) sed -e 's/\r$//' inputfil...
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Moving average or running mean

... UPD: more efficient solutions have been proposed by Alleo and jasaarim. You can use np.convolve for that: np.convolve(x, np.ones((N,))/N, mode='valid') Explanation The running mean is a case of the mathematical operation of convolution. For the running mean, you slide a win...
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Why can I throw null in Java? [duplicate]

...erException. In other words, throw checks that its argument is nonnull, and if it is null, it throws a NullPointerException. JLS 14.18 specifies this behavior: If evaluation of the Expression completes normally, producing a null value, then an instance V' of class NullPointerException is cre...
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Not able to type in textfield in iphone simulator using Mac Keyboard?

I'm working on a basic iOS app which supports both portrait and landscape modes. When the iPhone simulator keyboard is open in landscape and I'm switching the app to portrait mode I'm unable to type anything in any text field using my Mac physical keyboard. ...
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Formula px to dp, dp to px android

...ing to calculate a variable amount of pixels to density independent pixels and vice-versa. 20 Answers ...
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How to remove focus around buttons on click

... I found this Q and A on another page, and overriding the button focus style worked for me. This problem may be specific to MacOS with Chrome. .btn:focus { outline: none; box-shadow: none; } Note though that this has implications for ...
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When should I use a List vs a LinkedList

...his should not be an accepted answer. As I was learning I did some tests and felt like sharing them. Original answer... I found interesting results: // Temporary class to show the example class Temp { public decimal A, B, C, D; public Temp(decimal a, decimal b, decimal c, decimal d) ...
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could not resolve host github.com error while cloning remote repository in git

What I did: I have created a remote repository on Github and I am trying to clone the remote repository on my local machine. While cloning I am providing the clone URL & target folder. ...
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How to mkdir only if a directory does not already exist?

... run under the KornShell (ksh) on AIX. I would like to use the mkdir command to create a directory. But the directory may already exist, in which case I do not want to do anything. So I want to either test to see that the directory does not exist, or suppress the "File exists" error that mkdir t...
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How to get past the login page with Wget?

...re the --post-data parameter is properly percent-encoded (especially ampersands!) or the request will probably fail. Also make sure that user and password are the correct keys; you can find out the correct keys by sleuthing the HTML of the login page (look into your browser’s “inspect element”...