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When using Spring Security, what is the proper way to obtain current username (i.e. SecurityContext)

I have a Spring MVC web app which uses Spring Security. I want to know the username of the currently logged in user. I'm using the code snippet given below . Is this the accepted way? ...
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Android Crop Center of Bitmap

I have bitmaps which are squares or rectangles. I take the shortest side and do something like this: 9 Answers ...
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How to trim whitespace from a Bash variable?

I have a shell script with this code: 42 Answers 42 ...
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JavaScript for…in vs for

Do you think there is a big difference in for...in and for loops? What kind of "for" do you prefer to use and why? 23 Answe...
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Git hangs while writing objects

I'm trying to git push -u origin master And it just hangs at 9 Answers 9 ...
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How to ignore whitespace in a regular expression subject string?

Is there a simple way to ignore the white space in a target string when searching for matches using a regular expression pattern? For example, if my search is for "cats", I would want "c ats" or "ca ts" to match. I can't strip out the whitespace beforehand because I need to find the begin and en...
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find vs find_by vs where

I am new to rails. What I see that there are a lot of ways to find a record: 12 Answers ...
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How to make ng-repeat filter out duplicate results

I'm running a simple ng-repeat over a JSON file and want to get category names. There are about 100 objects, each belonging to a category - but there are only about 6 categories. ...
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Scala: List[Future] to Future[List] disregarding failed futures

I'm looking for a way to convert an arbitrary length list of Futures to a Future of List. I'm using Playframework, so ultimately, what I really want is a Future[Result] , but to make things simpler, let's just say Future[List[Int]] The normal way to do this would be to use Future.sequence(...) ...
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How to upload a file in Django? [closed]

As a newbie to Django, I am having difficulty making an upload app in Django 1.3. I could not find any up-to-date example/snippets. May someone post a minimal but complete (Model, View, Template) example code to do so? ...