###########################  Starter Kit for Lab 4  ##########################
$ cat asg52g.add
NORTH CAROLINA:RALEIGH:43.3:60.4:48.5
ARIZONA:PHOENIX:7.1:86.4:64.2
NORTH CAROLINA:ASHVILLE:35.4:57.3:34.2
NORTH CAROLINA:RALEIGH:44.3:55.1:44.2
ARIZONA:TUCSON:11.1:80.4:55.2
ARIZONA:FLAGSTAFF:14.2:66.4:30.5
PENNSYLVANIA:PHILADELPHIA:39.6:65.4:46.4
NEW YORK:BUFFALO:40.2:57.3:28.2
NEW YORK:NEW YORK:41.4:66.4:50.0
WYOMING:CASPER:15.2:55.2:22.4

$ asg52g.pl -a asg52g.add
Will not add duplicate record for NORTH CAROLINA, RALEIGH!

$ asg52g.pl -l
State                 City               Precip.   Mean High    Mean Low
-----                 ----               -------   ---------    --------
NORTH CAROLINA      RALEIGH               43.3        60.4       48.5
ARIZONA             PHOENIX               7.1         86.4       64.2
NORTH CAROLINA      ASHVILLE              35.4        57.3       34.2
ARIZONA             TUCSON                11.1        80.4       55.2
ARIZONA             FLAGSTAFF             14.2        66.4       30.5
PENNSYLVANIA        PHILADELPHIA          39.6        65.4       46.4
NEW YORK            BUFFALO               40.2        57.3       28.2
NEW YORK            NEW YORK              41.4        66.4       50.0
WYOMING             CASPER                15.2        55.2       22.4

$ asg52g.pl -s "  aRIZONa  "
City                Precip.   Mean High    Mean Low
----                -------   ---------    --------
PHOENIX              7.1         86.4        64.2     
TUCSON               11.1        80.4        55.2     
FLAGSTAFF            14.2        66.4        30.5     

$ asg52g.pl -s "UPPer REvolta"
No data for state: UPPER REVOLTA

$ cat asg52g.add2
WYOMING:CASPER:14.2:50.3:33.2
NEW MEXICO:CARLSBAD:9.7:70.2:44.3

$ asg52g.pl -a asg52g.add2
Will not add duplicate record for WYOMING, CASPER!

$ asg52g.pl -l
State                 City               Precip.   Mean High    Mean Low
-----                 ----               -------   ---------    --------
NORTH CAROLINA      RALEIGH               43.3        60.4       48.5
ARIZONA             PHOENIX               7.1         86.4       64.2
NORTH CAROLINA      ASHVILLE              35.4        57.3       34.2
ARIZONA             TUCSON                11.1        80.4       55.2
ARIZONA             FLAGSTAFF             14.2        66.4       30.5
PENNSYLVANIA        PHILADELPHIA          39.6        65.4       46.4
NEW YORK            BUFFALO               40.2        57.3       28.2
NEW YORK            NEW YORK              41.4        66.4       50.0
WYOMING             CASPER                15.2        55.2       22.4
NEW MEXICO          CARLSBAD              9.7         70.2       44.3

$ cat asg52g.update
ARIZONA:PHOENIX:7.4:88.5:65.2
NEW MEXICO:ALBUQUERQUE:8.8:67.5:44.3

$ asg52g.pl -u asg52g.update
Cannot update record with NEW MEXICO,ALBUQUERQUE! Not found!

voyager 13% cat asg52g.del
ARIZONA:FLAGSTAFF
NEW YORK:BUFFALO

$ asg52g.pl -d asg52g.del

#  Note below that Flagstaff, AZ and Buffalo, NY are gone!
#  Note that Phoenix, AZ has been updated!
$ asg52g.pl -l
State                 City               Precip.   Mean High    Mean Low
-----                 ----               -------   ---------    --------
NORTH CAROLINA      RALEIGH               43.3        60.4       48.5
ARIZONA             PHOENIX               7.4         88.5       65.2
NORTH CAROLINA      ASHVILLE              35.4        57.3       34.2
ARIZONA             TUCSON                11.1        80.4       55.2
PENNSYLVANIA        PHILADELPHIA          39.6        65.4       46.4
NEW YORK            NEW YORK              41.4        66.4       50.0
WYOMING             CASPER                15.2        55.2       22.4
NEW MEXICO          CARLSBAD              9.7         70.2       44.3