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Check if a given key already exists in a dictionary and increment it
Given a dictionary, how can I find out if a given key in that dictionary has already been set to a non-None value?
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What is the optimal algorithm for the game 2048?
I have recently stumbled upon the game 2048 . You merge similar tiles by moving them in any of the four directions to make "bigger" tiles. After each move, a new tile appears at random empty position with a value of either 2 or 4 . The game terminates when all the boxes are filled and there are ...
Why is pow(a, d, n) so much faster than a**d % n?
I was trying to implement a Miller-Rabin primality test , and was puzzled why it was taking so long (> 20 seconds) for midsize numbers (~7 digits). I eventually found the following line of code to be the source of the problem:
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What is the difference between Bower and npm?
What is the fundamental difference between bower and npm ? Just want something plain and simple. I've seen some of my colleagues use bower and npm interchangeably in their projects.
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Find the most frequent number in a numpy vector
Suppose I have the following list in python:
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How do you do a deep copy of an object in .NET? [duplicate]
I want a true deep copy. In Java, this was easy, but how do you do it in C#?
11 Answers
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What is a singleton in C#?
What is a Singleton and when should I use it?
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What is the facade design pattern?
Is facade a class which contains a lot of other classes?
20 Answers
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Why JavaScript rather than a standard browser virtual machine?
Would it not make sense to support a set of languages (Java, Python, Ruby, etc.) by way of a standardized virtual machine hosted in the browser rather than requiring the use of a specialized language -- really, a specialized paradigm -- for client scripting only?
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What does threadsafe mean?
Recently I tried to Access a textbox from a thread (other than the UI thread) and an exception was thrown. It said something about the "code not being thread safe" and so I ended up writing a delegate (sample from MSDN helped) and calling it instead.
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