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When to use EntityManager.find() vs EntityManager.getReference() with JPA
I have come across a situation (which I think is weird but is possibly quite normal) where I use the EntityManager.getReference(LObj.getClass(), LObj.getId()) to get a database entity and then pass the returned object to be persisted in another table.
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Is there any kind of hash code function in JavaScript?
Basically, I'm trying to create an object of unique objects, a set. I had the brilliant idea of just using a JavaScript object with objects for the property names. Such as,
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SqlException from Entity Framework - New transaction is not allowed because there are other threads
I am currently getting this error:
20 Answers
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Update Row if it Exists Else Insert Logic with Entity Framework
Does anyone have suggestions on the most efficient way to implement "update row if it exists else insert" logic using Entity Framework?
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Is there a Java reflection utility to do a deep comparison of two objects?
I'm trying to write unit tests for a variety of clone() operations inside a large project and I'm wondering if there is an existing class somewhere that is capable of taking two objects of the same type, doing a deep comparison, and saying if they're identical or not?
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Java: Best way to iterate through a Collection (here ArrayList)
Today I was happily coding away when I got to a piece of code I already used hundreds of times:
6 Answers
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Use cases for the 'setdefault' dict method
The addition of collections.defaultdict in Python 2.5 greatly reduced the need for dict 's setdefault method. This question is for our collective education:
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Create directories using make file
I'm a very new to makefiles and i want to create directories using makefile. My project directory is like this
9 Answers
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How can I create a directly-executable cross-platform GUI app using Python?
Python works on multiple platforms and can be used for desktop and web applications, thus I conclude that there is some way to compile it into an executable for Mac, Windows and Linux.
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Rails and PostgreSQL: Role postgres does not exist
I have installed PostgreSQL on my Mac OS Lion, and am working on a rails app. I use RVM to keep everything separate from my other Rails apps.
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