Module onejoker::utils

wiki | General utility functions

Functions that are probably available in the standard libraries for general use, but implemented here to be more specifically tailored and optimized for card games.

Structs

• Random
  wiki | A simple xoshiro256** PRNG

Constants

• COEFFICIENTS
  Lookup table for binomial coefficients up to 63c63, calculated additively with Pascal’s triangle method at compile time.

Functions

• oj_binomial
  wiki | Calculate binomial coefficient Calculate the binomial coefficient “n choose k” using a lookup table. Is only valid for n, k in the range 0..=63.
• oj_next_combination
  wiki | Iterate over combinations Given an array of indices into a larger array, increment the 0-based indices to the next k-combination, returning true when done.
• oj_shuffle
  wiki | Standard Fisher-Yates shuffle
• oj_sort
  wiki | Slightly specialized heapsort Heapsort optimized for small sets like poker hands, and in descending order which is most useful for ranking and displaying poker hands.