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Using the field of an object as a generic Dictionary key
If I want to use objects as the keys for a Dictionary , what methods will I need to override to make them compare in a specific way?
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How to remove convexity defects in a Sudoku square?
I was doing a fun project: Solving a Sudoku from an input image using OpenCV (as in Google goggles etc). And I have completed the task, but at the end I found a little problem for which I came here.
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Why are Perl 5's function prototypes bad?
In another Stack Overflow question Leon Timmermans asserted:
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Return type of '?:' (ternary conditional operator)
...sion can be an lvalue or an rvalue. This is its value category. (This is somewhat of a simplification, in C++11 we have lvalues, xvalues and prvalues.)
In very broad and simple terms, an lvalue refers to an object in memory and an rvalue is just a value that may not necessarily be attached to an obj...
Understanding Fragment's setRetainInstance(boolean)
Starting with the documentation:
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In JavaScript, does it make a difference if I call a function with parentheses?
I noticed a difference when calling a function with empty parentheses, or without any parentheses at all. However, I am not passing any arguments to the function so I wondered, what would be the difference between:
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Re-raise exception with a different type and message, preserving existing information
I'm writing a module and want to have a unified exception hierarchy for the exceptions that it can raise (e.g. inheriting from a FooError abstract class for all the foo module's specific exceptions). This allows users of the module to catch those particular exceptions and handle them distinctly,...
SET versus SELECT when assigning variables?
What are the differences between the SET and SELECT statements when assigning variables in T-SQL?
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How can I provide multiple conditions for data trigger in WPF?
How can I provide multiple conditions for data trigger in WPF?
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Boost Statechart vs. Meta State Machine
Apparently boost contains two separate libraries for state machines: Statechart and Meta State Machine (MSM). The taglines give very similar descriptions:
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