ruby-gsl Sample: comb.rb

#!/usr/local/bin/ruby


require "GSL"
include GSL

# Test combinations

STDERR.puts "Running tests for combinations..."

n = 4
k = 3
0.upto(4) do |k|
  c = Combination.new(n, k)
  c.init_first

  printf "\nn = %d, k = %d\n", c.n, c.k
  #puts c.is_valid?
  #puts "first combination: " +  c.to_a.join(" ")

  #0.upto(k-1) do |i|
  #  puts c.get(i)
  #end

  puts "each: "
  c.each do |k|
    puts k.to_a.join(" ")
  end

  puts "reverse_each: "
  c.reverse_each do |k|
    puts k.to_a.join(" ")
  end
end

# generate all "Lotto" numbers :-)
#c = Combination.new(49, 6)
#c.init_first
#File.open("lotto.dat", "w") do |f|
  #c.each do |k|
    #k.fprintf(f, "%Zu\t") 
    #f.puts
  #end
#end

STDERR.puts "\ndone."