Beefy Boxes and Bandwidth Generously Provided by pair Networks
XP is just a number
 
PerlMonks  

ReleaseAction

by tilly (Archbishop)
on Apr 16, 2001 at 22:00 UTC ( #72887=snippet: print w/ replies, xml ) Need Help??

Description: Call an anon sub as it is destroyed. (Typically by going out of scope.) For instance:
use strict; use Cwd; use Carp; use ReleaseAction; sub cd_to { chdir($_[0]) or confess("Cannot chdir to '$_[0]': $!"); } sub temp_cd { my $cwd = cwd(); cd_to(shift); return ReleaseAction->new( sub {cd_to($cwd);} ); } # And a simple test system "pwd"; { my $var = temp_cd('/tmp'); system "pwd"; } system "pwd";
package ReleaseAction;

# Pass this a sub...
sub new {
  bless($_[1], $_[0]);
}

# and call it when it goes.
sub DESTROY {
  shift->();
}

1;
Comment on ReleaseAction
Download Code

Back to Snippets Section

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: snippet [id://72887]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others imbibing at the Monastery: (2)
As of 2014-07-26 17:50 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    My favorite superfluous repetitious redundant duplicative phrase is:









    Results (178 votes), past polls