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Hash (Associative Array) Functions

#Format: #keys(ASSOC_ARRAY) #keys ASSOC_ARRAY # The keys function returns the keys of a hash %weekday= (    '1'=>'Monday',                '2'=>'Tuesday',                '3'=>'Wednesday',                '4'=>'Thursday',                '5'=>'Friday',                '6'=>'Saturday',                '7'=>'Sunday',               ); foreach $key ( keys(%weekday) ){print "$key ";} print "\n"; foreach $key ( sort keys(%weekday) ){print $key ;} print "\n";