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Groups > comp.lang.javascript > #33393

Re: convert dob into days

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negisunny38@gmail.com wrote on 24 May 2017 in comp.lang.javascript:

> Hi
> 
> is this a right way to convert dob into days.
> 
> ========code sample============
> 
> //convert date into days
> 
> function calculate_age(birth_month, birth_day, birth_year) {

Don't be so American.

>     var diffDays = 0;
>     var oneDay = 24 * 60 * 60 * 1000; //
>     hours*minutes*seconds*milliseconds var firstDate = new
>     Date(birth_year, birth_month, birth_day);

1 month wrong!

>     var secondDate = new  Date(); 
> return diffDays = Math.round(Math.abs((firstDate.getTime() -       
> secondDate.getTime()) / (oneDay))); 
>}
> 
> I am looking for best way to calculate days lived from birthday. 

Nonsense, "best way" is subjective.

Try:

'use strict';

function ageDays(y, m, d) {
    let oneDay = 24 * 60 * 60 * 1000;
    let dob = new Date(y, m-1, d);
    let now = new Date();
    return Math.floor( (now-dob)/oneDay );
};

document.write( ageDays(2017,5,22) );
 



-- 
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)

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convert dob into days negisunny38@gmail.com - 2017-05-24 09:58 -0700
  Re: convert dob into days "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-05-24 19:16 +0200
    Re: convert dob into days negisunny38@gmail.com - 2017-05-24 10:31 -0700
      Re: convert dob into days "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-05-24 23:08 +0200
    Re: convert dob into days Mark Lloyd <not@mail.invalid> - 2017-05-24 16:33 -0500
      Re: convert dob into days "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-05-25 16:29 +0200
  Re: convert dob into days Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-05-24 20:06 +0200
    Re: convert dob into days Mark Lloyd <not@mail.invalid> - 2017-05-24 16:24 -0500
      Re: convert dob into days Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-05-25 01:00 +0200
        Re: convert dob into days Mark Lloyd <not@mail.invalid> - 2017-05-24 19:35 -0500
          Re: convert dob into days Jon Ribbens <jon+usenet@unequivocal.eu> - 2017-05-25 11:27 +0000
          Re: convert dob into days Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-05-25 13:45 +0200
            Re: convert dob into days Mark Lloyd <not@mail.invalid> - 2017-05-25 13:35 -0500
              Re: convert dob into days Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-05-26 00:35 +0200
              Re: convert dob into days Dr J R Stockton <J.R.Stockton@physics.org> - 2017-05-25 15:45 -0700
                Re: convert dob into days "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-05-26 09:12 +0200
            Re: convert dob into days Dr J R Stockton <reply1700@merlyn.demon.co.uk.invalid> - 2017-05-26 18:40 +0100
              Re: convert dob into days Sam E <why.should.this@be.email.invalid> - 2017-05-27 10:14 -0500
  Re: convert dob into days Dr J R Stockton <J.R.Stockton@physics.org> - 2017-05-24 14:36 -0700

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