#!/usr/bin/perl -w

#----------------------------------------------------------------------#
#  printHashByValue.pl                                                 #
#                                                                      #
#  Copyright 1998 DevDaily Interactive, Inc.  All Rights Reserved.     #
#----------------------------------------------------------------------#

#----------------------------------------------------------------------#
#  FUNCTION:  hashValueAscendingNum                                    #
#                                                                      #
#  PURPOSE:   Help sort a hash by the hash 'value', not the 'key'.     #
#             Values are returned in ascending numeric order (lowest   #
#             to highest).                                             #
#----------------------------------------------------------------------#

sub hashValueAscendingNum {
   $grades{$a} <=> $grades{$b};
}


#----------------------------------------------------------------------#
#  FUNCTION:  hashValueDescendingNum                                   #
#                                                                      #
#  PURPOSE:   Help sort a hash by the hash 'value', not the 'key'.     #
#             Values are returned in descending numeric order          #
#             (highest to lowest).                                     #
#----------------------------------------------------------------------#

sub hashValueDescendingNum {
   $grades{$b} <=> $grades{$a};
}


%grades = (
	student1 => 90,
	student2 => 75,
	student3 => 96,
	student4 => 55,
	student5 => 76,
);

print "\n\tGRADES IN ASCENDING NUMERIC ORDER:\n";
foreach $key (sort hashValueAscendingNum (keys(%grades))) {
   print "\t\t$grades{$key} \t\t $key\n";
}

print "\n\tGRADES IN DESCENDING NUMERIC ORDER:\n";
foreach $key (sort hashValueDescendingNum (keys(%grades))) {
   print "\t\t$grades{$key} \t\t $key\n";
}