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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;
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[1nickt]: Corion HPs? ugh. I was impressed with Lenovo's gaming laptops; if it weren't for the red backlighting and general flashiness of the aesthetic, I might have gone with that. But all that was until I discovered that the Dell Precision line is still around.
[1nickt]: stevieb I don;t doubt that there's a difference. BestBuy has "consumer" models only on display.
[ambrus]: 1nickt: for some reason, these days they call every computer "gaming", even ones that gamers wouldn't buy. I've bought a keyboard that was labelled "gamer", despite that it has hard springs and seems to be way better for typing than for gaming;
[1nickt]: I though the gamers like that because they bash the keys so hard.
[ambrus]: and I've seen motherboards with no fast expansion ports for a video card but built-in hardware RAID advertized as "gaming".
LanX has a shaming laptop
[ambrus]: 1nickt: my impression is that the gamers like the softer springs, because fast reaction time is more important to them then feedback from keypresses to recognize typos.

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