#!/usr/bin/ruby

#
## http://rosettacode.org/wiki/Sort_stability
#

var table = [
  <UK  London>,
  <US  New\ York>,
  <US  Birmingham>,
  <UK  Birmingham>,
];
 
table.sort {|a,b| a[0] <=> b[0]}.each { |col|
    say "#{col[0]} #{col[1]}"
}
