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Rotating a two-dimensional array in Python
In a program I'm writing the need to rotate a two-dimensional array came up. Searching for the optimal solution I found this impressive one-liner that does the job:
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What's wrong with overridable method calls in constructors?
I have a Wicket page class that sets the page title depending on the result of an abstract method.
7 Answers
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Immutable vs Unmodifiable collection
From the Collections Framework Overview :
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Git clone particular version of remote repository
I cloned a remote git repository about a month ago. The remote repository has undergone many changes and has now become unstable. Now I need another copy of the repository, version identical to the one I cloned a month ago.
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CSS “and” and “or”
I've got quite big trouble, because i need to anathematise from styling some input types. I had something like:
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What are paramorphisms?
Reading through this classic paper , I'm stuck on paramorphisms. Unfortunately the section is quite thin, and the Wikipedia page doesn't say anything.
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Iterating over every two elements in a list
How do I make a for loop or a list comprehension so that every iteration gives me two elements?
21 Answers
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How to pass boolean values to a PowerShell script from a command prompt
I have to invoke a PowerShell script from a batch file. One of the arguments to the script is a boolean value:
10 Answers
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Java SafeVarargs annotation, does a standard or best practice exist?
I've recently come across the java @SafeVarargs annotation. Googling for what makes a variadic function in Java unsafe left me rather confused (heap poisoning? erased types?), so I'd like to know a few things:
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What does value & 0xff do in Java?
I have the following Java code:
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