Ah, but if the OP wants an answer in the form "the person is X years
old today," that's where the problem arises. A good edge case is:
Birthday: 2/28/2000
Today: 2/27/2001
With the getTime() approach, new Date("2/27/2001").getTime() - new
Date("2/28/2000").getTime() gives 31536000000 (Jan 1, 1971 UTC), or
365 days. In this case the age is not 1 though, because that year
was 366 days instead of 365. That's why I would still choose to do
the calculation without getTime(), and why I don't think those doc
examples are particularly good ones - a day is not always 24 hours, a
year is not always 365 days, etc.
And sorry for beating a dead horse so badly! :)
--- In flexcoders@yahoogroups.com, "Tracy Spratt" <[EMAIL PROTECTED]> wrote:
>
> Oops, yes, the subtraction should be reversed.
>
>
>
> But one of the overloads of the Date constructor takes a single
> argument, the number of milliseconds from the reference date, the
same
> reference date as the getTime() method. The doc example shows this
> method for adding time to a date, but I expect it will work for
> subracting time as well.
>
>
>
> Tracy
>
>
>
> ________________________________
>
> From: flexcoders@yahoogroups.com
[mailto:[EMAIL PROTECTED] On
> Behalf Of Doug Lowder
> Sent: Tuesday, October 02, 2007 3:37 PM
> To: flexcoders@yahoogroups.com
> Subject: [flexcoders] Re: Return a person's age
>
>
>
> Wouldn't that produce a negative number, given that birthDate
> probably comes before todayDate?
>
> Discounting that, I think that would give you the person's age in
> milliseconds.
>
> --- In flexcoders@yahoogroups.com <mailto:flexcoders%
40yahoogroups.com>
> , "Tracy Spratt" <tspratt@> wrote:
> >
> > Based on my reading of the docs, there is a simpler way:
> >
> > var age = new Date(birthDate.getTime() - todayDate.getTime);
> >
> > Untested.
> >
> > Tracy
> >
> > ________________________________
> >
> > From: flexcoders@yahoogroups.com <mailto:flexcoders%
40yahoogroups.com>
>
> [mailto:flexcoders@yahoogroups.com <mailto:flexcoders%
40yahoogroups.com>
> ] On
> > Behalf Of JRBower
> > Sent: Tuesday, October 02, 2007 2:29 AM
> > To: flexcoders@yahoogroups.com <mailto:flexcoders%
40yahoogroups.com>
> > Subject: Re: [flexcoders] Return a person's age
> >
> >
> >
> >
> > Doug,
> > Thank you. I will give your code a go. :)
> >
> > Best Regards,
> > James
> >
> > Doug Lowder wrote:
> > >
> > > Here's how I would do it:
> > >
> > > var age:Number = todayDate.fullYear - birthDate.fullYear;
> > > if (todayDate.month < birthDate.month || (todayDate.month ==
> > > birthDate.month && todayDate.date < birthDate.date)) age--;
> > > return age;
> > >
> > >
> >
> > --
> > View this message in context:
> > http://www.nabble.com/Return-a-person%27s-age-
> <http://www.nabble.com/Return-a-person%27s-age->
> tf4545118.html#a12993386
> > <http://www.nabble.com/Return-a-person%27s-age-
> <http://www.nabble.com/Return-a-person%27s-age->
> tf4545118.html#a12993386>
> >
> > Sent from the FlexCoders mailing list archive at Nabble.com.
> >
>
