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Fastest check if row exists in PostgreSQL
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Difference between single quotes and double quotes in Javascript [duplicate]
...interpretation of variable inside a string and the treatment of escape characters.
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How to convert a string Date to long millseconds
...PI also known as JSR-310, is so much nicer to work with. You can use it on Android through the ThreeTenABP, see this question: How to use ThreeTenABP in Android Project.
For most purposes I recommend using the milliseconds since the epoch at the start of the day in UTC. To obtain these:
DateTi...
warning: Insecure world writable dir /usr/local/bin in PATH, mode 040777
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java.util.Date vs java.sql.Date
...time functionality is back-ported to Java 6 & 7 in ThreeTen-Backport.
Android
Later versions of Android bundle implementations of the java.time classes.
For earlier Android (<26), the ThreeTenABP project adapts ThreeTen-Backport (mentioned above). See How to use ThreeTenABP….
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On logout, clear Activity history stack, preventing “back” button from opening logged-in-only Activi
...f the history stack so that pressing the "back" button returns the user to Android's home screen.
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Is there a performance difference between a for loop and a for-each loop?
... penalty of allocating the iterator. I had some highly parallel code in an Android live wallpaper. I saw that the garbage collector was going crazy. It was because for-each loops were allocating temporary iterators in many different (short-lived) threads, cause the garbage collector a lot of work. S...