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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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Most efficient method to groupby on an array of objects

...ailed to understand how in the world does it work starting from ...result. Now I can't sleep because of that. – user3307073 Mar 29 '19 at 9:26 ...
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Could not open a connection to your authentication agent

... @xtian I'm not sure that I understand the issue. I don't know the exact details, but I'm guessing that the private key is never sent over the network. I think ssh-add merely decrypts an encrypted private key on the host machine, so that it can be used locally...it's never sent to an...
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“is” operator behaves unexpectedly with integers

... does anyone know how that range (-5, 256) was chosen? i wouldn't be too surprised if it were (0, 255) or even (-255, 255), but a range of 262 numbers starting at -5 seems surprisingly arbitrary. – Woodrow Barlow ...
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How do I capture response of form.submit

...Say if you wanted to post to a URL for a download through a button click? Now you can't use Ajax for your request. Want to then clean up or update the interface when the download is complete? Now is a time to want a callback from a POST that isn't Ajax. (Necropost, I know.) –...
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calculating the difference in months between two dates

... @Dinah this just an approximation, if you want to know the true .Month and .Years - I've just posted an answer for that which you can read. Although, as far as approximations so, this is a good approximation (props to Adam Robinson) however you should keep in mind that if you...
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This project references NuGet package(s) that are missing on this computer

I have an ASP.NET MVC5 application that worked yesterday and now I am getting this error when I try to build: 18 Answers ...
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Firebug says “No Javascript on this page”, even though JavaScript does exist on the page

... This should be the answer now, Firebug is dead. – Steve Hibbert Nov 23 '16 at 15:59 11 ...
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How to install PyQt4 on Windows using pip?

... "AMD64". To make it short: AMD's version was better and Intel adopted it, now calling it Intel64 for their CPUs - both are pretty much compatible (very minor differences). So pretty much every 64bit x86-64 CPU out there (except Itaniums) uses AMD64. – user136036 ...
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Creating .pem file for APNS?

... I have followed the above steps and now its working.I have kept the certificate and the php script on my local web server (Xampp). I am able to get the device token , and i am using it in the php script. The php script is able to connect and send payload data....