in reply to RE: Re: Calculating a persons age based on their birthday.
in thread Calculating a persons age based on their birthday.

Date::Calc (or, heaven forbid, Date::Manip) is probably overkill since you only want age in years. All you really want to know is whether the birthday has passed this year. 
sub age {
    # Assuming $birth_month is 0..11
    my ($birth_day, $birth_month, $birth_year) = @_;

    my ($day, $month, $year) = (localtime)[3..5];
    $year += 1900;

    my $age = $year - $birth_year;
    $age-- unless sprintf("%02d%02d", $month, $day)
               >= sprintf("%02d%02d", $birth_month, $birth_day);
    return $age;
}

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Of course, if you're only using this on a person's birthday, all you need to do is subtract their birth year from the current year :-)

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RE: RE: RE: Re: Calculating a persons age based on their birthday.
by plaid (Chaplain) on May 03, 2000 at 04:06 UTC
    The above code is what I'd recommend using, as it's simple enough that the use of modules isn't really needed.. Then again I'm not a module-nazi:) One caveat about this code though: The value returned to $month in the call to localtime is 0 based, i.e. 0..11. I'm not sure if this might contrast the format of the $birth_month that is being passed in.. if so, just change the appropriate line to read 
    $age-- unless sprintf("%02d%02d", $month+1, $day)

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[d/l]
      And just what is a module nazi?
[reply]
        Someone who puts a tractor tire on a moped for fear of reinventing the wheel.
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RE: RE: RE: Re: Calculating a persons age based on their birthday.
by kayos (Sexton) on May 03, 2000 at 17:19 UTC

    I don't think this code would work if the person was born before 1970.

    T.R. Fullhart, kayos@kayos.org

[reply]
      It even works if someone were born before 1900: print age(8, 9, 1866), "\n"; Result: 133. See man localtime for details.
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[d/l]

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