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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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From an array of objects, extract value of a property as array
I have JavaScript object array with the following structure:
16 Answers
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Looking for a good world map generation algorithm [closed]
I'm working on a Civilization-like game and I'm looking for a good algorithm for generating Earth-like world maps. I've experimented with a few alternatives, but haven't hit on a real winner yet.
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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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If Python is interpreted, what are .pyc files?
I've been given to understand that Python is an interpreted language...
However, when I look at my Python source code I see .pyc files, which Windows identifies as "Compiled Python Files".
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Which is more efficient: Multiple MySQL tables or one large table?
I store various user details in my MySQL database. Originally it was set up in various tables meaning data is linked with UserIds and outputting via sometimes complicated calls to display and manipulate the data as required. Setting up a new system, it almost makes sense to combine all of these tabl...
Circular list iterator in Python
I need to iterate over a circular list, possibly many times, each time starting with the last visited item.
6 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 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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What is the meaning of prepended double colon “::”?
I found this line of a code in a class which I have to modify:
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