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Interfaces with static fields in java for sharing 'constants'

I'm looking at some open source Java projects to get into Java and notice a lot of them have some sort of 'constants' interface. ...
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How can I get the current screen orientation?

I just want to set some flags when my orientation is in landscape so that when the activity is recreated in onCreate() i can toggle between what to load in portrait vs. landscape. I already have a layout-land xml that is handling my layout. ...
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A cron job for rails: best practices?

...Listener.process_new_messages puts "done." end To execute from the command line, this is just "rake cron". This command can then be put on the operating system cron/task scheduler as desired. Update this is quite an old question and answer! Some new info: the heroku cron service I referenced ...
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Give examples of functions which demonstrate covariance and contravariance in the cases of both over

Please show a good example for covariance and contravariance in Java. 3 Answers 3 ...
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What is `mt=8` in iTunes links for the App Store?

...menter above, in case you haven't figured out, ls=1 means the URL will try and open iTunes and follow the link. If ls=1 is not included it will simply load the web page for that particular media asset. – Rog Feb 3 '12 at 0:14 ...
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Casperjs/PhantomJs vs Selenium

... have seen majority of our users using Chrome. So we wanted to know - pros and cons of using PhantomJS vs Selenium: 5 Answe...
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HTML5 textarea placeholder not appearing

...not appear. It seems as though it may be covered up with some blank spaces and tabs. When you focus on the text area and delete from where the cursor puts itself, then leave the text area, the proper placeholder then appears. ...
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AWS MySQL RDS vs AWS DynamoDB [closed]

I've been using MySQL for a fair while now and I'm comfortable with its structure & SQL Queries etc. 4 Answers ...
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Where to put model data and behaviour? [tl; dr; Use Services]

I am working with AngularJS for my latest project. In the documentation and tutorials all model data is put into the controller scope. I understand that is has to be there to be available for the controller and thus within the corresponding views. ...
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Remote Connections Mysql Ubuntu

... been unable to connect remotely to my MySQL server. I've tried everything and I'm still getting errors. 5 Answers ...