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How do ACID and database transactions work?
What is the relationship between ACID and database transaction?
8 Answers
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How should equals and hashcode be implemented when using JPA and Hibernate
How should model class's equals and hashcode be implemented in Hibernate? What are the common pitfalls? Is the default implementation good enough for most cases? Is there any sense to use business keys?
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Difference between a SOAP message and a WSDL?
I am confused about how SOAP messages and WSDL fit together? I have started looking into SOAP messages such as:
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StringIO in Python3
I am using Python 3.2.1 and I can't import the StringIO module. I use
io.StringIO and it works, but I can't use it with numpy 's genfromtxt like this:
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When to use nested classes and classes nested in modules?
I'm pretty familiar with when to use subclasses and modules, but more recently I've been seeing nested classes like this:
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How to record webcam and audio using webRTC and a server-based Peer connection
I would like to record the users webcam and audio and save it to a file on the server. These files would then be able to be served up to other users.
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Programmer Puzzle: Encoding a chess board state throughout a game
...e: I liked this topic so much I wrote Programming Puzzles, Chess Positions and Huffman Coding. If you read through this I've determined that the only way to store a complete game state is by storing a complete list of moves. Read on for why. So I use a slightly simplified version of the problem for ...
How to re-create database for Entity Framework?
... losing data, I just want to be able to start fresh, recreate the database and start using Code-First migrations.
7 Answer...
How to use Servlets and Ajax?
I'm very new to web apps and Servlets and I have the following question:
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When should I use a composite index?
..._C )
will benefit a query that uses those fields for joining, filtering, and sometimes selecting. It will also benefit queries that use left-most subsets of columns in that composite. So the above index will also satisfy queries that need
index( column_A, column_B, column_C )
index( column_A, col...