adding to a ddmmyyyy date

[ginajohnst]

Hi All.

I'm having a problem adding days to a date.

My date is in the string format dd/mm/yyyy eg. 23/08/2007 in my
form field.

I can't work out how to add 50 days to that date and then write it to
another form field.

Any help would be appreciated.

[Dr J R Stockton]

In comp.lang.javas cript message <f9*********@dr n.newsguy.com>, Wed, 8
Aug 2007 16:40:17, Lee <RE************ **@cox.netposte d:

>Thomas 'PointedEars' Lahn said:

>...

Can you explain how your ludicrous multiplication method works
if the resulting date is earlier than the 10th of the month?

The multiplication method is currently good for generating YYYYMMDD.

It is not good for DDMMYYYY or 8-digit FFF.

OTOH, given that separators are required, consider

d = new Date("1234/01/02") // 1234 Jan 2
X =
String(d.getFul lYear()*1e4 + d.getMonth()*1e 2 + d.getDate() + 100)
.replace(/(\d{4})(\d\d)(\ d\d)/, "$3/$2/$1");

Change the \d{4} to \d+ and the code will be shorter and last longer.

--
(c) John Stockton, Surrey, UK. ?@merlyn.demon. co.uk Turnpike v6.05 IE 6.
Web <URL:http://www.merlyn.demo n.co.uk/- w. FAQish topics, links, acronyms
PAS EXE etc : <URL:http://www.merlyn.demo n.co.uk/programs/- see 00index.htm
Dates - miscdate.htm moredate.htm js-dates.htm pas-time.htm critdate.htm etc.

[Dr J R Stockton]

In comp.lang.javas cript message <fZ************ **@invalid.uk.c o.demon.me
rlyn.invalid>, Fri, 10 Aug 2007 21:04:47, Dr J R Stockton
<jr*@merlyn.dem on.co.ukposted:

>In comp.lang.javas cript message <46************ **@PointedEars. de>, Fri,
10 Aug 2007 09:27:13, Thomas 'PointedEars' Lahn <Po*********@we b.de>
posted:

>>Dr J R Stockton wrote:

>>Javascript lacks specific syntax for creating a Date Object of a given
Ordinal Date;

Define "Ordinal Date". If you mean something like the number of
millisecond s since the beginning of the UNIX era, then

It is defined in ISO 8601, which is IIRC released as an EN and possibly
a DIN. Alas, 8601 is AFAIK not free (unlike 8602); but the definition
is easily found by Google.

Correction : I had forgotten that ISO 8601:2004 was in fact available
free in PDF, from ISO, <http://isotc.iso.org/livelink/livelink?func=ll&o
bjId=4020763&ob jAction=browse& sort=nameprobab ly; and from OMG -- links
are on my site, but I forget which I actually used. It seems that ISO
do allow one to pay for the paper version and for the PDF, if one so
wishes.

--
(c) John Stockton, Surrey, UK. ?@merlyn.demon. co.uk Turnpike v6.05 IE 6.
Web <URL:http://www.merlyn.demo n.co.uk/- w. FAQish topics, links, acronyms
PAS EXE etc : <URL:http://www.merlyn.demo n.co.uk/programs/- see 00index.htm
Dates - miscdate.htm moredate.htm js-dates.htm pas-time.htm critdate.htm etc.

[dhtmlkitchen]

On Aug 8, 12:16 am, ginajohnst <ginajoh...@gma il.comwrote:

Hi All.

I'm having a problem adding days to a date.

My date is in the string format dd/mm/yyyy eg. 23/08/2007 in my
form field.

I can't work out how to add 50 days to that date and then write it to
another form field.

I'll try a more explicit approach.

The first step is to add 50 days to the date object.

// get the date.
var date = new Date();
var dayOfMonth = date.getDate()) ; // This API method "getDate" should
be renamed to "getDayOfMonth" .

// add 50 days.
date.setDate( dayOfMonth + 50 );

Any help would be appreciated.

Write a unit test to verify each step.

Here is a horrible ad hoc test:
javascript:aler t(new Date (new Date().setDate( new Date().getDate( ) +
50 ) - ( 50 * 24 * 60 * 60 * 1000 ) ) )

Garrett

[dhtmlkitchen]

The problem appears that there is no standard way of formatting a Date
to a customized string.

It seems possible to format a Date string using a RegExp, but the Date
string cannot be guaranteed to be in a specific format.

I would like to see this added to ES4.

var s = "EEE, MMM d, yyyy"
var df = DateFormat( s );
var formattedDay df.format( new Date() ); // Thu, Aug 23, 2007.

http://java.sun.com/j2se/1.5.0/docs/...ateFormat.html

[Thomas 'PointedEars' Lahn]

dh**********@gm ail.com wrote:

[...]
date.setDate( dayOfMonth + 50 );

You are a *little* late. <Xn************ ********@194.10 9.133.242>
PointedEars
--
var bugRiddenCrashP ronePieceOfJunk = (
navigator.userA gent.indexOf('M SIE 5') != -1
&& navigator.userA gent.indexOf('M ac') != -1
) // Plone, register_functi on.js:16

[Dr J R Stockton]

In comp.lang.javas cript message <11************ *********@z24g2 000prh.goo
glegroups.com>, Thu, 23 Aug 2007 23:48:11, "dh**********@g mail.com"
<dh**********@g mail.composted:

>The problem appears that there is no standard way of formatting a Date
to a customized string.

It seems possible to format a Date string using a RegExp, but the Date
string cannot be guaranteed to be in a specific format.

I would like to see this added to ES4.

var s = "EEE, MMM d, yyyy"
var df = DateFormat( s );
var formattedDay df.format( new Date() ); // Thu, Aug 23, 2007.

http://java.sun.com/j2se/1.5.0/docs/...ateFormat.html

Since that is Java, and this is a Javascript newsgroup, ISTM that you
have a severe sagacity deficiency.
It's a good idea to read the newsgroup c.l.j and its FAQ. See below.

--
(c) John Stockton, Surrey, UK. ?@merlyn.demon. co.uk Turnpike v6.05 IE 6
news:comp.lang. javascript FAQ <URL:http://www.jibbering.c om/faq/index.html>.
<URL:http://www.merlyn.demo n.co.uk/js-index.htmjscr maths, dates, sources.
<URL:http://www.merlyn.demo n.co.uk/TP/BP/Delphi/jscr/&c, FAQ items, links.

[Dr J R Stockton]

In comp.lang.javas cript message <11************ *********@r23g2 000prd.goo
glegroups.com>, Thu, 23 Aug 2007 23:43:35, "dh**********@g mail.com"
<dh**********@g mail.composted:

>Here is a horrible ad hoc test:
javascript:ale rt(new Date (new Date().setDate( new Date().getDate( ) +
50 ) - ( 50 * 24 * 60 * 60 * 1000 ) ) )

That will, at present, show the present date and time.

But change both instances of 50 to 130, and it will probably show you an
hour after present time, but might show the present time or an hour (or
half an hour, but that's unlikely) before present time.

Until you understand that, it would be better if you did not try to
answer Javascript date questions.

--
(c) John Stockton, Surrey, UK. ?@merlyn.demon. co.uk Turnpike v6.05 IE 6.
Web <URL:http://www.merlyn.demo n.co.uk/- w. FAQish topics, links, acronyms
PAS EXE etc : <URL:http://www.merlyn.demo n.co.uk/programs/- see 00index.htm
Dates - miscdate.htm moredate.htm js-dates.htm pas-time.htm critdate.htm etc.

[Randy Webb]

Dr J R Stockton said the following on 8/24/2007 4:24 PM:

In comp.lang.javas cript message <11************ *********@z24g2 000prh.goo
glegroups.com>, Thu, 23 Aug 2007 23:48:11, "dh**********@g mail.com"
<dh**********@g mail.composted:

>The problem appears that there is no standard way of formatting a Date
to a customized string.

It seems possible to format a Date string using a RegExp, but the Date
string cannot be guaranteed to be in a specific format.

I would like to see this added to ES4.

var s = "EEE, MMM d, yyyy"
var df = DateFormat( s );
var formattedDay df.format( new Date() ); // Thu, Aug 23, 2007.

http://java.sun.com/j2se/1.5.0/docs/...ateFormat.html

Since that is Java, and this is a Javascript newsgroup, ISTM that you
have a severe sagacity deficiency.

If you had bothered to read, and comprehend, the line preceding the code
posted you would have realized some things that you are either too
arrogant or too ignorant to admit, possibly - and probably - both.

--
Randy
Chance Favors The Prepared Mind
comp.lang.javas cript FAQ - http://jibbering.com/faq/index.html
Javascript Best Practices - http://www.JavascriptToolbox.com/bestpractices/