Leap Yr regular expression

[Randy Webb]

Dr John Stockton said the following on 2/19/2006 3:04 PM:

JRS: In article <[email protected]>,
dated Sun, 19 Feb 2006 00:57:52 remote, seen in

On 18/02/2006 18:08, Vladas Saulis wrote:

[snip]

When you create a date = YYYY.02.29 for a non-leap year, you get back
a YYYY.03.01. And the getMonth() for the "March" is equal to 2 (for
february = 1).

That's why I called it kinda an exploit (unexpected (for me)
behaviour).

However, it /is/ expected behaviour. The Date object is well-known for
handling out-of-range values by adjusting adjacent fields. It does this
by design.

For those who injudiciously put VBscript on Web pages,

There is nothing "injudicious" about putting VBScript on Web pages.

It's wise if you know when, its ignorant if you don't.

or who more sagaciously use VBscript in WSH :

Sesquipedalian behavior is a sign of ignorance, not intelligence.

 

[Thomas 'PointedEars' Lahn]

Following this logic, then the date = YYYY.MM.00 should return the last
day of the previous month.
Correct.

Am I right?

You are.

(I have no time to test .

Typing

javascript:window.alert(new Date(2000, 1, 0));

into your location bar and hit the Return key is too much for you?


PointedEars

 

[Dr John Stockton]

JRS: In article <op.s47pc7qy8lqgld@eightpee>, dated Sun, 19 Feb 2006
10:47:21 remote, seen in Vladas Saulis

Following this logic, then the date = YYYY.MM.00 should return the last
day of the previous month.
Am I right? (I have no time to test .

Use the newsgroup FAQ, and you will learn such things; see below.

With at least one localisation new Date("2005.01.00") gives NaN, as
does new Date("2005-01-00") -- but new Date("2005/01/00")
gives me Fri Dec 31 00:00:00 UTC 2004 and should set the local
equivalent of that anywhere.

One can get St Andrew's Day as new Date((year+1)+"/0/0") .

Also read <URL:http://www.merlyn.demon.co.uk/js-quick.htm>.