Number To Words Converter (100 => One Hundred) (Java)

2010-07-18T11:17:52-07:00

Java recipe 577312 by st0le (conversions, integer, java, number).

Converts Integers to Words.

Chek if a number is a power of two (Python)

2010-12-23T11:29:38-08:00

Python recipe 577514 by A. Polino (2, check, number, power, python). Revision 2.

Pretty good way to check if a number is a power of two or not.

Long period random number generator (Python)

2010-12-02T05:19:25-08:00

Python recipe 576707 by Raymond Hettinger (generator, number, random). Revision 13.

Implements a complementary-multiply-with-carry psuedo-random-number-generator. Period is 3636507990 * 2 ** 43487 (approximately 10 ** 13101).

format a number as an ordinal (Python)

2010-02-04T12:54:27-08:00

Python recipe 576888 by Serdar Tumgoren (number, numbers, numerals, ordinals). Revision 10.

This function converts 0 and positive integers (or their string representations) to their ordinal values. For example, it would convert 0 to "0th", 1 to "1st", 2 to "2nd", 3 to "3rd" and so on.

Inverse modulo p (Python)

2013-01-31T23:41:21-08:00

Python recipe 576737 by Justin Shaw (mod, modulo, number, prime, theory). Revision 4.

Very rarely it is necessary to find the multiplicative inverse of a number in the ring of integers modulo p. Thie recipe handles those rare cases. That is, given x, an integer, and p the modulus, we seek a integer x^-1 such that x * x^-1 = 1 mod p. For example 38 is the inverse of 8 modulo 101 since 38 * 8 = 304 = 1 mod 101. The inverse only exists when a and p are relatively prime.

Prime Number Generator (Python)

2009-02-03T15:47:06-08:00

Python recipe 576640 by dth (eratosthene, generator, number, of, prime, sieve). Revision 7.

Generate all prime numbers up to n.

Credit Card Validation (Python)

2011-08-11T19:06:58-07:00

Python recipe 577838 by Stijn de Graaf (card, credit, false, number, testing, true, validating, validation).

Test validity of any credit card number using the LUHN method (mod 10). Starting at the last digit and moving backwards, you add up every other digit. Then, you double the left-out digits, and add the digits of these results to the original sum. If this satisfies sum mod 10 == 0 then the card is valid.

This is also explained at http://www.beachnet.com/~hstiles/cardtype.html

Spoken Word to Number (Python)

2012-09-11T18:42:09-07:00

Python recipe 578258 by Pushpendre (converter, nlp, number, spoken).

convert number represented the way they are spoken to actual numbers

Class to calculate increment of variables based on time (units per seconds) (Python)

2008-08-18T16:29:08-07:00

Python recipe 576424 by nosklo (increment, linear, number, time, units_per_second, variables). Revision 3.

A simple calculation of small increments to be applied to a variable, given the variable time that has passed since last update, to make a linear increase over time (in units per second).

Random Number Game (C)

2012-03-29T03:47:52-07:00

C recipe 578088 by Jacob A. Bridges (c, game, guessing, number).

An old game I created freshman year of college. For use on Windows OS only. (The code contains a few Windows system calls.)

Evolutionary Algorithm (Generation of Prime Numbers) (Python)

2011-11-27T06:45:00-08:00

Python recipe 577964 by Alexander James Wallar (algorithm, example, genetic, genetic_algorithm, genetic_algorithms, list, number, of, prime, primelist, primes, theory).

This is an evolutionary algorithm that returns a random list of prime numbers. This code is highly inefficient for a reason. This algorithm is more of a proof of concept that if a prime was a heritable trait, it would not be a desired one.

Parameters:

isPrime --> n: number to check if it is prime allPrimes --> n: size of list of random primes, m: the primes in the list will be between 0 and m

Invert the well ids from a 96-well plate (Python)

2009-09-04T02:36:01-07:00

Python recipe 576895 by Kevin (96, biology, id, invert, number, sequencing, well). Revision 2.

Due to a mixup in processing, I require to invert the order of the well numbers from a 96-well plate

Fibonacci Number Generator (Python)

2011-04-13T00:00:59-07:00

Python recipe 577651 by Sunjay Varma (fibonacci, generator, memorizing, number).

This recipe allows for individual number generation, and allows for generations of number ranges as well.

The recipe automatically memorizes numbers generated before and keeps them through out the running of the script. This recipe cannot handle too large of numbers, but does act as a simple solution for most cases.

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