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# Write a script that allows you to capture/display historical data. It could be an object or a scalar. For example
# my $x = 10; $x = 20; $x -= 5;
# After the above operations, it should list $x historical value in order.
use strict;
use warnings;
use v5.10;
package hist;
sub TIESCALAR {
my $class = shift;
my $this = [];
bless $this, $class;
return $this;
}
sub STORE {
push @{ $_[0] }, $_[1];
}
sub FETCH {
return $_[0][-1];
}
sub GETHIST {
return @{ $_[0] };
}
1;
package main;
use Data::Dumper;
my $obj = tie my $x, "hist";
$x = 10;
$x = 20;
$x -= 5;
$x = 3.1416;
$x = [qw(a quick brown fox jumps over the lazy dog)];
$x = 1e3;
$x*= sqrt 3;
print Dumper($obj->GETHIST());
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