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Kids are discriminated for being kids. They're not allowed to smoke, drink alcohol and use various internet offers. but writing "not for kids" on a homepage barely fulfills legal and real life requirements, software has to calculate the age based on a known date of birth.
mySQL has a DATE_INTERVAL command but should be considered very bad style to submit simple math issues to the database unless you need to fetch some stored data. Better use Date::Calc and pure Perl:
use Date::Calc qw(Today date_check N_Delta_YMD);=pod
=head2 calculate_age
$age = calculate_age($date_of_birth);
Return the current age based on the given date of birth (YYYY-MM-DD).
Sample:
calculate_age('1979-08-20');
Returns 33 (at least today).
=cut
sub calculate_age my @dob = split(/\-/, shift);
# Check if given date of birth is valid. return unless check_date(@dob);
# Calculate the years, months and days since the given date of birth my @age = N_Delta_YMD(@dob, Today());
return $age[0];}
check_date is strongly suggested because all (other) Date::Calc functions will die in case of any invalid date passed.
6 Kommentare. Schreib was dazu-
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Jay
6.03.2013 21:36
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Sebastian Willing
7.03.2013 6:46
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Sebastian Willing
7.03.2013 6:46
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Dave Cross
7.03.2013 8:38
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Sebastian Willing
7.03.2013 8:46
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Sebastian Willing
7.03.2013 8:46
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Or use Time::Piece + Time::Seconds (part of core since 5.10)
[Imported from blog]
[Imported from blog]
I only ever use Time::Piece or DateTime for time and date calculations these days.
#!/usr/bin/perl
use strict;
use warnings;
use 5.010;
use Time::Piece;
say calculate_age('1979-08-20');
sub calculate_age {
my $dob = Time::Piece->strptime(shift, '%Y-%m-%d');
my $age = Time::Piece->localtime - $dob;
return int $age->years;
}
[Imported from blog]
[Imported from blog]