Date as Filename

[Smoke]

I have a series of pictures that are named as dates, example November 10th,
2003 would be 10102003.gif

Why does the following script fail?

<script language="JavaS cript">

var d = new Date()
var filename = (d.getDate()) & (d.getMonth() + 1)& (d.getFullYear( ))
var fileextension = ".gif"
var file = filename + fileextension
document.write( "<img src=http://www.mysite.com/fishing/"+file+" width='358'
height='233' border='0' alt='' >")

</script>

[VK]

Re: Date as Filename

Welcome from xBasic to JavaScript ! :-)

1. & is bitwise "AND" operator (not a string concatenator)
2. ends of statements marked by (not just by new line)

Good luck!

var d = new Date();
var filename = "" + (d.getDate()) + (d.getMonth() + 1) +
(d.getFullYear( ));
var fileextension = ".gif";
var file = filename + fileextension;
document.write( "<img src=http://www.mysite.com/fishing/"+file+"
width='358'
height='233' border='0' alt='' >");

[VK]

Re: Date as Filename

and yes, you have to use "pseudo-casting" with an empty string (there
are more options):
"" + (d.getDate()) + ...
in order to receive the concatenated string and not the sum of
arguments.

[Dr John Stockton]

Re: Date as Filename

JRS: In article <wZMrb.13583$62 .6872@lakeread0 4>, seen in
news:comp.lang. javascript, Smoke <smoke@xatrium. com> posted at Mon, 10
Nov 2003 08:08:29 :-[color=blue]
>I have a series of pictures that are named as dates, example November 10th,
>2003 would be 10102003.gif[/color]

Never use the Nth day of the month numbered N as an example; number
months from 0 only internally, and not in public. Best to use day-of-
month > 12 in an example. Date fields should be in Y M D order, so that
Christmas coming is 20031225. In the US 10102003 means October 10th
2003; but elsewhere it means 10th October 2003.

[color=blue]
>Why does the following script fail?
>
><script language="JavaS cript">
>
>var d = new Date()
> var filename = (d.getDate()) & (d.getMonth() + 1)& (d.getFullYear( ))[/color]

& != +

The smart way to get YYYYMMDD is

var fn = (d.getFullYear( )*100 + d.getMonth()+1) *100 + d.getDate()

Note that you seem to have forgotten to provide leading zeroes.

However, to be similar to your example the +1 should not be used.

--
© John Stockton, Surrey, UK. ?@merlyn.demon. co.uk Turnpike v4.00 IE 4 ©
<URL:http://jibbering.com/faq/> Jim Ley's FAQ for news:comp.lang. javascript
<URL:http://www.merlyn.demo n.co.uk/js-index.htm> JS maths, dates, sources.
<URL:http://www.merlyn.demo n.co.uk/> TP/BP/Delphi/JS/&c., FAQ topics, links.

[Fabian]

Re: Date as Filename

Dr John Stockton hu kiteb:

[color=blue]
> The smart way to get YYYYMMDD is
>
> var fn = (d.getFullYear( )*100 + d.getMonth()+1) *100 + d.getDate()[/color]

year * 10000


--
--
Fabian
Visit my website often and for long periods!

http://www.lajzar.co.uk

[Lasse Reichstein Nielsen]

Re: Date as Filename

"Fabian" <lajzar@hotmail .com> writes:
[color=blue]
> Dr John Stockton hu kiteb:
>
>[color=green]
> > The smart way to get YYYYMMDD is
> >
> > var fn = (d.getFullYear( )*100 + d.getMonth()+1) *100 + d.getDate()[/color]
>
> year * 10000[/color]

No, notice the parentheses and the second *100.

/L
--
Lasse Reichstein Nielsen - lrn@hotpop.com
DHTML Death Colors: <URL:http://www.infimum.dk/HTML/rasterTriangleD OM.html>
'Faith without judgement merely degrades the spirit divine.'

[Dr John Stockton]

Re: Date as Filename

JRS: In article <u15b7gbm.fsf@h otpop.com>, seen in
news:comp.lang. javascript, Lasse Reichstein Nielsen <lrn@hotpop.com >
posted at Tue, 11 Nov 2003 04:08:13 :-[color=blue]
>"Fabian" <lajzar@hotmail .com> writes:
>[color=green]
>> Dr John Stockton hu kiteb:
>>
>>[color=darkred]
>> > The smart way to get YYYYMMDD is
>> >
>> > var fn = (d.getFullYear( )*100 + d.getMonth()+1) *100 + d.getDate()[/color]
>>
>> year * 10000[/color]
>
>No, notice the parentheses and the second *100.[/color]

Notice also that in my method each operator can be executed immediately
it is reached, whereas with 10000 that would not be the case; mine is
therefore better on a single-accumulator pseudo-machine.

I don't know whether that helps, but it is unlikely to be harmful.

--
© John Stockton, Surrey, UK. ?@merlyn.demon. co.uk / ??.Stockton@phy sics.org ©
Web <URL:http://www.merlyn.demo n.co.uk/> - FAQish topics, acronyms, & links.
Correct <= 4-line sig. separator as above, a line precisely "-- " (SoRFC1036)
Do not Mail News to me. Before a reply, quote with ">" or "> " (SoRFC1036)