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What is the difference between persist() and merge() in JPA and Hibernate?

...entity (updated) and a copy of this updated entity will return back. (from now on any changes should be made on this returned entity if you want to reflect your changes in persistence context) share | ...
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How to comment out a block of Python code in Vim

...tley honestly I think I just followed a pattern without thinking about it. Now I'm surprised # vs / didn't come up sooner. Changed the answer based on common sense. Thanks! – cdated Sep 28 '16 at 20:30 ...
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maximum value of int

... I know it's an old question but maybe someone can use this solution: int size = 0; // Fill all bits with zero (0) size = ~size; // Negate all bits, thus all bits are set to one (1) So far we have -1 as result 'till size is a ...
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How can I run PowerShell with the .NET 4 runtime?

... .NET 2 (the same version of the framework that PowerShell runs with), but now needs to work with .NET 4 assemblies as well as .NET 2 assemblies. ...
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Git error on commit after merge - fatal: cannot do a partial commit during a merge

... that ended in a conflict. I resolved the conflict and everything is fine now (I used mergetool also). 17 Answers ...
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git submodule tracking latest

...it submodule update --remote If you had a submodule already present you now wish would track a branch, see "how to make an existing submodule track a branch". Also see Vogella's tutorial on submodules for general information on submodules. Note: git submodule add -b . [URL to Git repo]; ...
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Get users by name property using Firebase

...primitives for managing lists of data: Write to Firebase with a unique, known key: ref.child('users').child('123').set({ "first_name": "rob", "age": 28 }) Append to lists with an auto-generated key that will automatically sort by time written: ref.child('users').push({ "first_name": "rob", "age...
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What are carriage return, linefeed, and form feed?

...downward to the next "page". It was commonly used as page separators, but now is also used as section separators. (It's uncommonly used in source code to divide logically independent functions or groups of functions.) Text editors can use this character when you "insert a page break". This is com...
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How can I custom-format the Autocomplete plug-in results?

... ul ); }; } Call that function once in $(document).ready(...) . Now, this is a hack, because: there's a regexp obj created for every item rendered in the list. That regexp obj ought to be re-used for all items. there's no css class used for the formatting of the completed part. It's...
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What's the recommended approach to resetting migration history using Django South?

...ments where you need the migrated, fully-populated db. South sacrilege, I know, but worked for me. share | improve this answer | follow | ...