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Setting up and exercising a typeglob
Variables in Perl example from a Well House Consultants training course
More on Variables in Perl [link] Source code: ty Module: P301
$abc = "bottle nosed dolphin"; @abc = (3,5,6,"more"); # 4 elements %abc = (43,45,46,"6more"); # 2 pairs! sub abc {print "YES"; 42} print &abc; open (ABC,">paddington.txt"); print ABC "Is this the train to Chip and Ham\n"; # A "typeglob" - one of each of the other types! # Actually applies an alias / another name # Everything that's an "abc" is also to be known as a "def" # --------------------------------------------------------- *def = *abc; # And now changing any of the def variable will change the abc # variable of the same type too $def[1] = 14; print ("\n@def\n"); print ("\n@abc\n"); for $gadget(keys %def) { print ("$gadget $def{$gadget}\n"); } &def; print "\n$def or $abc \n"; $def = uc($abc); print "\n$def or $abc \n"; *def = $abc; # ODD THING TO DO - messed up $def :-( print "\n$def or $abc \n"; __END__ wizard:pl graham$ perl ty YES42 3 14 6 more 3 14 6 more 46 6more 43 45 YES bottle nosed dolphin or bottle nosed dolphin BOTTLE NOSED DOLPHIN or BOTTLE NOSED DOLPHIN or BOTTLE NOSED DOLPHIN wizard:pl graham$ Learn about this subject
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