Math
Mathematics is the study of quantity, structure, space, and change. Any math questions on this site should be programming related.
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How do I calculate a point on a circle’s circumference?
How can the following function be implemented in various languages? Calculate the (x,y) point on the circumfe
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Is log(n!) = Θ(n·log(n))?
I am to show that log(n!) = Θ(n·log(n)). A hint was given that I should show the upper bound with nn and sh
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How can I ensure that a division of integers is always rounded up?
I want to ensure that a division of integers is always rounded up if necessary. Is there a better way than thi
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1.5K
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How to scale down a range of numbers with a known min and max value
So I am trying to figure out how to take a range of numbers and scale the values down to fit a range. The rea
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21
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Generate a random point within a circle (uniformly)
I need to generate a uniformly random point within a circle of radius R. I realize that by just picking a uni
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19
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456
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Mapping two integers to one, in a unique and deterministic way
Imagine two positive integers A and B. I want to combine these two into a single integer C. There can be no
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26
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Too many 'if' statements?
The following code does work how I need it to, but it's ugly, excessive or a number of other things. I&ap
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23
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How to determine if a list of polygon points are in clockwise order?
Having a list of points, how do I find if they are in clockwise order? For example: point[0] = (5,0) point[1
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21
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Why can't decimal numbers be represented exactly in binary?
There have been several questions posted to SO about floating-point representation. For example, the decimal n
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What is "entropy and information gain"?
I am reading this book (NLTK) and it is confusing. Entropy is defined as: Entropy is the sum of the proba
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30
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Calculate distance between 2 GPS coordinates
How do I calculate distance between two GPS coordinates (using latitude and longitude)?
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Difference between Math.Floor() and Math.Truncate()
What is the difference between Math.Floor() and Math.Truncate() in .NET?
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How to check if a number is a power of 2
Today I needed a simple algorithm for checking if a number is a power of 2. The algorithm needs to be: Simpl
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How do I determine whether my calculation of pi is accurate?
I was trying various methods to implement a program that gives the digits of pi sequentially. I tried the Tayl
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28
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Understanding "randomness"
I can't get my head around this, which is more random? rand() OR: rand() * rand() I´m finding it a
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Designing function f(f(n)) == -n
A question I got on my last interview: Design a function f, such that: f(f(n)) == -n Where n is a 3
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30
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473
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Calculate distance between two latitude-longitude points? (Haversine formula)
How do I calculate the distance between two points specified by latitude and longitude? For clarification, I&
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30
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1.1K
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Easy interview question got harder: given numbers 1..100, find the missing number(s) given exactly k are missing
I had an interesting job interview experience a while back. The question started really easy: Q1: We have a b
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Determine Whether Two Date Ranges Overlap
Given two date ranges, what is the simplest or most efficient way to determine whether the two date ranges ove
