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What is the difference between Serializable and Externalizable in Java?
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To add to the other answers, by implementating java.io.Serializable, you get "automatic" serialization capability for objects of your class. No need to implement any other logic, it'll just work. The Java runtime will use reflection to figure out how to marsh...
Why must jUnit's fixtureSetup be static?
I marked a method with jUnit's @BeforeClass annotation, and got this exception saying it must be static. What's the rationale? This forces all my init to be on static fields, for no good reason as far as I see.
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Explain the use of a bit vector for determining if all characters are unique
...(not too familiar with bit vectors). Here is the code given. Could someone please walk me through this?
12 Answers
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How to move a model between two Django apps (Django 1.7)
So about a year ago I started a project and like all new developers I didn't really focus too much on the structure, however now I am further along with Django it has started to appear that my project layout mainly my models are horrible in structure.
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How to change the background color of the options menu?
I'm trying to change the default color for the options menu which is white: I want a black background for every item on the options menu.
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How do I pass a variable by reference?
The Python documentation seems unclear about whether parameters are passed by reference or value, and the following code produces the unchanged value 'Original'
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How do I obtain a Query Execution Plan in SQL Server?
In Microsoft SQL Server how can I get a query execution plan for a query / stored procedure?
12 Answers
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What's wrong with using $_REQUEST[]?
I've seen a number of posts on here saying not to use the $_REQUEST variable. I usually don't, but sometimes it's convenient. What's wrong with it?
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Why is exception handling bad?
Google's Go language has no exceptions as a design choice, and Linus of Linux fame has called exceptions crap. Why?
15 Answ...
How to find time complexity of an algorithm
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How to find time complexity of an algorithm
You add up how many machine instructions it will execute as a function of the size of its input, and then simplify the expression to the largest (when N is very large) term and can include any simpl...