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Transaction marked as rollback only: How do I find the cause

...pass through @Transactional proxy wrapper, i.e. uncaught. See other answer from Vojtěch for the full story. There could be nested @Transactional methods that can mark your transaction rollback-only. – Yaroslav Stavnichiy Mar 17 '17 at 15:52 ...
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Best way to create enum of strings?

... Custom String Values for Enum from http://javahowto.blogspot.com/2006/10/custom-string-values-for-enum.html The default string value for java enum is its face value, or the element name. However, you can customize the string value by overriding toString(...
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How to convert Set to String[]?

... From Java 7 we can use String[] GPXFILES1 = myset.toArray(new String[0]) and that's recommended. Update the answer. "Since late updates of OpenJDK 6 this call was intrinsified, making the performance of the empty array versi...
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Best way to clear a PHP array's values

...f you want something more powerful use unset since it also will clear $foo from the symbol table, if you need the array later on just instantiate it again. unset($foo); // $foo is gone $foo = array(); // $foo is here again ...
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What is the difference between “px”, “dip”, “dp” and “sp”?

... From the Android Developer Documentation: px Pixels - corresponds to actual pixels on the screen. in Inches - based on the physical size of the screen. 1 Inch = 2.54 centimeters mm Millimeters - based on ...
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Read the package name of an Android APK

... Is there a way to call this from within Android code? I want to be able to launch a package of an apk I download through my app. – Matt Wear Jun 19 '12 at 15:59 ...
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How to diff a commit with its parent?

Aside from writing an alias or script, is there a shorter command for getting the diff for a particular commit? 8 Answers ...
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TypeError: not all arguments converted during string formatting python

...ng to pass in a tuple into the string format method. I found the solution from this question/answer Copying and pasting the correct answer from the link (NOT MY WORK): >>> thetuple = (1, 2, 3) >>> print "this is a tuple: %s" % (thetuple,) this is a tuple: (1, 2, 3) Making a...
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What is the difference between ${var}, “$var”, and “${var}” in the Bash shell?

...an *. Specifically: $@ "[e]xpands to the positional parameters, starting from one. When the expansion occurs within double quotes, each parameter expands to a separate word." In an array, "[i]f the word is double-quoted, ${name[*]} expands to a single word with the value of each array member separ...
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Get itunes link for app before submitting

... The manual way: Your should copy your "Apple ID" from iTunes connect and use this link: http://itunes.apple.com/us/app/APPNAME/idXXXXXXXXX Would open the US store ("APPNAME" is that app name and XXXXXXXXX is the "Apple ID". You can use more general method (Recommended): ...