arsd.random

A random number generator that can work with std.random but does not have to.

It is designed to be reasonably good and fast, more for fun than for security.

Members

randomInteger alias randomInteger = uniform: Gets a random number from a uniform distribution including min and up to (but not including) max from the reasonable default generator.

bellCurve int bellCurve(int median, int standardDeviation, int min, int max)
int bellCurve(Rng gen, int median, int standardDeviation, int min, int max): Pick a random number off the normal (aka gaussian) distribution bell curve.
getReasonableDefaultGenerator Rng getReasonableDefaultGenerator(ulong seed)
Rng getReasonableDefaultGenerator(): Gets a "reasonable default" random number generator, one good enough for my casual use. This is the object used by the other functions when you don't explicitly use your own generator.
randomFloat float randomFloat()
float randomFloat(Rng gen): Gets a random number between 0.0 and 1.0, including 0.0, but not including 1.0.
shuffle void shuffle(T[] array)
void shuffle(Rng gen, T[] array): Shuffles the contents of the array, in place. Assumes elements can be easily swapped. (the current implementation is an in-place Fisher-Yates algorithm)
uniform int uniform(int min, int max)
int uniform(Rng gen, int min, int max): Gets a random number from a uniform distribution including min and up to (but not including) max from the reasonable default generator.
weightedChoice int weightedChoice(int[] weights)
int weightedChoice(Rng gen, int[] weights): Returns an index of the weights, with the proportional odds given by the weights.