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Re: Undoable Objects

by bikeNomad (Priest)
on Jun 17, 2001 at 23:10 UTC ( #89188=note: print w/replies, xml ) Need Help??


in reply to Undoable Objects

It would also be a good idea to add a DESTROY method in that same scope so that the history gets cleaned up when objects go away:

{ my %history; sub _log { my $self = shift; my $attrib = shift; my $value = $self->{$attrib}; push @{ $history{$self} }, [ $attrib, $value ]; } sub undo { my $self = shift; return unless (scalar @{ $history{$self} }); my ($attrib, $value) = @{ pop @{ $history{$self} } }; $self->{$attrib} = $value; } sub DESTROY { my $self = shift; delete $history{$self}; } }

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[hippo]: +1 for Text::CSV_XS
[ovedpo15]: Im not allowed to use additional modules, so I can't use it. looking for a simple regex to do this task though..
[Corion]: Ah, so this is homework? Then most likely, you should review your course material closer. It would greatly surprise me if the course material wouldn't mention the topics that will be used in the homework...
[Corion]: I already showed you the simple regex to match the last part of a string without a comma in it
[Tux]: Corion++ hippo++
[ovedpo15]: it isn't homework. its a module I use at work. The process to add additional module isn't worth it. p.s never heard a university course which teach perl
[marto]: there are many, to this day.
[ovedpo15]: @Corion Yes I use the regex you showed me. its very good regex. although now i need to know that substring unit that comma
marto mad corrections to one around 18 months ago
[ovedpo15]: my code checks the value after that comma, if it isn't valid it will remove it. so I would like to remove the substring after that comma meaning getting the string before comma.

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