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Clicking the back button twice to exit an activity

I've noticed this pattern in a lot of Android apps and games recently: when clicking the back button to "exit" the application, a Toast comes up with a message similar to "Please click BACK again to exit". ...
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php $_POST array empty upon form submission

...rs for similar issue when POSTing with JSON content-type. Found the answer and wanted to share it as it cost me much time. When using JSON content-type the $_POST array will not populate (only with multi-part forms I believe) Here is what did work to correct the issue: $rest_json = file_get_conte...
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What is the difference between :first-child and :first-of-type?

I can't tell the difference between element:first-child and element:first-of-type 3 Answers ...
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What is the best way to implement constants in Java? [closed]

... That is perfectly acceptable, probably even the standard. (public/private) static final TYPE NAME = VALUE; where TYPE is the type, NAME is the name in all caps with underscores for spaces, and VALUE is the constant value; I highly recommend NOT putting your constants in ...
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htmlentities() vs. htmlspecialchars()

What are the differences between htmlspecialchars() and htmlentities() . When should I use one or the other? 12 Answers ...
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Why are empty strings returned in split() results?

... back the original string. If the empty strings were not there, the first and last '/' would be missing after the join() share | improve this answer | follow ...
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What's the “average” requests per second for a production web application?

...mory database...still need to test with live DB. DB may be our bottleneck and bring us back down unless we switch to nosql). – Dean Hiller Jun 6 at 0:28 ...
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API to automatically upload apk to Google Play? [closed]

...t allows you to upload to any channel (ie. alpha, beta...) or update title and description and more. From the docs: Uploading new versions of an app Releasing apps, by assigning APKs to various Tracks (alpha, beta, staged rollout, or production) Creating and modifying Google Play Store li...
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How to understand nil vs. empty vs. blank in Ruby

...dly looking for a clear definition of the differences of nil? , blank? , and empty? in Ruby on Rails. Here's the closest I've come: ...
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Building big, immutable objects without using constructors having long parameter lists

I have some big (more than 3 fields) objects that can and should be immutable. Every time I run into that case I tend to create constructor abominations with long parameter lists. ...