ruby-gsl Sample: perm.rb


#!/usr/local/bin/ruby


require "GSL"
include GSL

# Test permutations

STDERR.puts "Running permutation tests..."

perm = Permutation.new(10)
puts "\n  size  = #{perm.size}"
print "  perm  = "
perm.fprintf(STDOUT, " %u")
perm.swap(2, 4).swap(3, 5)
print "\n  swap  = "
#puts perm.to_a.join(" ")
perm.dump
perm.next
print "\n  next  = "
perm.dump
perm.prev
print "\n  prev  = "
perm.dump
print "\n  valid: ", perm.is_valid? ? "yes" : "no", "\n"
begin
  print "\nwriting to file..."
  f = File.new("perm.dump", "w")
  perm.fwrite(f)
  f.close
  puts "ok"
  print "reading from file..."
  f = File.new("dump", "r")
  perm = Permutation.new(10)
  perm.fread(f)
  f.close
  puts "ok"
  perm.dump
  puts "\nread/write: ok"
rescue IOError
  STDERR.print "Caught exception: #{$!}\n"
end

puts "\ntesting each:"
perm = Permutation.new(4)
perm.each {|p| p.dump; printf "\n"}

STDERR.puts "\ndone."

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