| Category: | Miscellaneous |
| Author/Contact Info | perl@simonflack.com $code or die http://www.simonflack.com |
| Description: | This module lets you define a range of dates or numeric values and will return which set a given test value is a member of. Personally, this will save me precious minutes by not having to do a lot of if .. then statements. It's not highly advanced or anything, just quite useful I think. e.g. want to do something depending on the value of x, but don't want the values to be hard-coded or difficult to change\add to? Please let me know if you have any questions or suggestions - specifically, I'm looking for a nice way of removing that nasty eval statement... Also, do you think it's worth submitting this to CPAN, if so is Set::Range OK? POD to follow... |
package Set::Range;
require Exporter;
use constant DATE_RANGE => 1;
use constant NUM_RANGE => 2;
use constant TIME_RANGE => 3;
use constant EU_DATE_RANGE => 4;
@ISA = qw(Exporter);
@EXPORT = qw(DATE_RANGE EU_DATE_RANGE NUM_RANGE TIME_RANGE);
sub new {
my $self = shift;
my $range = shift;
return bless $range, $self;
}
sub getSet {
my ($self, $var, $type) = @_;
$type = NUM_RANGE unless $type;
if (($type == DATE_RANGE) || ($type == EU_DATE_RANGE)) {
$var = _timify($var, $type);
}
my $state = 0;
foreach $state (keys %$self) {
my ($u, $l) = ($self->{$state}->{upper},
$self->{$state}->{lower});
if (($type == DATE_RANGE) || ($type == EU_DATE_RANGE)) {
$upper= _timify($u, $type);
$lower= _timify($l, $type);
}
my ($uinc, $linc, $result);
if ($self->{$state}->{upper_inclusive}) {
$uinc = '>=';
} else { $uinc = '>' }
if ($self->{$state}->{lower_inclusive}) {
$linc = '>=';
} else { $linc = '>' }
$result =
eval "$state if (($u $uinc $var) && ($var $linc $l))";
return $result if $result;
}
return 0;
}
sub _timify {
my ($u, $type) = @_;
require Date::Calc;
if ($type == EU_DATE_RANGE) {
$u = Date::Calc::Date_to_Days(Date::Calc::Decode_Date_EU($u));
} else {
$u = Date::Calc::Date_to_Days(Date::Calc::Decode_Date_US($u));
}
return $u;
}
|
|
Back to
Code Catacombs