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Re: Your favorite objects NOT of the hashref phylum

by hv (Prior)
on Mar 23, 2006 at 17:28 UTC ( [id://538806]=note: print w/replies, xml ) Need Help??


in reply to Your favorite objects NOT of the hashref phylum

Here's a simple one I use, to locally override something:

package MyApp::Local; use strict; sub umask { my($class, $umask) = @_; my $old = umask $umask; $class->new(sub { umask $old }); } # ... and various other more application-specific methods sub new { my($class, $cb) = @_; bless $cb, $class; } sub DESTROY { my $self = shift; $self->(); undef; } 1;

Example use:

... { # create the file, must be world-writable my $temp = MyApp::Local->umask(0); my $fh; sysopen($fh, $path, O_WRONLY | O_CREAT | O_EXCL, 0666) or die "$path: $!\n"; close $fh; # umask restored when $temp goes out of scope, even by dying } ...

No particular reason this couldn't be a { callback => $cb } hashref, just didn't see the need.

Hugo

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