Question

[Kevin Davis]

Hello,

I would like to know if Javascript can do the following thing.

I have a list of files and they have the following names:

05 Jun 03
04 Jun 03
03 Jun 03
02 Jun 03
01 Jun 03

and so on..

I would like to know if there is a script that would
a: list the file names in the order (with the most recent first) and
automtically add the file that is listed say for example I add 06 Jun
03 to the listing and the list would show:

06 Jun 03
05 Jun 03
04 Jun 03
03 Jun 03
02 Jun 03
01 Jun 03

Thanks!
Kevin Davis

 

[Lasse Reichstein Nielsen]

I would like to know if Javascript can do the following thing.

I have a list of files and they have the following names:

05 Jun 03
04 Jun 03
03 Jun 03
02 Jun 03
01 Jun 03

and so on..

Make it an array.

var filenames = [
"05 Jun 03",
"04 Jun 03",
"03 Jun 03",
"02 Jun 03",
"01 Jun 03",
"30 Jul 03",
...
];

You decide how far back it must go. You can create it using Javascript
instead of writing it all out manually.

I would like to know if there is a script that would
a: list the file names in the order (with the most recent first)

List how? In a web page or a server, or in some other application?
You can iterate through the array by using a construct like
for (var i=0;i<filenames.length;i++) {
... filenames ...
}

and
automtically add the file that is listed say for example I add 06 Jun
03 to the listing and the list would show:

mynames.push("06 Jun 03");

I think there is more that you haven't told us, like how the list
is created and where it us used.
/L

 

[Lasse Reichstein Nielsen]

What I'm trying to do is have the web page placed on a web server and
have the list automatically update every time a file is uploaded. Is
there a way to do that?? The list will be on the web page.

You need to communicatet to the web page that a file has been uploaded,
browsers aren't psychic To do that, you need some server-side scripting
as well. That server-side script might as well generate the page too,
so I don't think you need client-side javascript.

/L

 

[Dr John Stockton]

JRS: In article <[email protected]>, seen
in Kevin Davis <[email protected]> posted at
Mon, 7 Jul 2003 06:10:53 :-

Please use an informative Subject line when starting a thread - see FAQ
2.3 para 2.

I would like to know if Javascript can do the following thing.

I have a list of files and they have the following names:

05 Jun 03
04 Jun 03
03 Jun 03
02 Jun 03
01 Jun 03

and so on..

I would like to know if there is a script that would

Surely the current existence is of no importance, and you merely want to
know whether you can have a script, possibly new.

a: list the file names in the order (with the most recent first) and
automtically add the file that is listed say for example I add 06 Jun
03 to the listing and the list would show:

06 Jun 03
05 Jun 03
04 Jun 03
03 Jun 03
02 Jun 03
01 Jun 03

To copy an array into reverse order, use .reverse(); to sort it use
..sort() .

You may or not be dealing with a (very simple) database; consider how
the data will be stored.

You may or may not need to actually sort an array of dates.

To sort those dates, one must first resolve the ambiguity of whether
they are all dates in this year or they are all June 3rd of different
years.

My MSIE4, happily, will give NaN for 06 Jun 03, but understands 2006 Jun
03 and 06 Jun 2003; but for 03/06/09 it transposes month and date, and
gets the century wrong.

If at all possible, choose file names such as 20030601 or 2003-06-01,
which are everywhere unambiguous. With a .replace to change - to /, the
latter can be read, everywhere, by new Date() if required.
Moreover, that format has the advantage that sorting as string gives the
correct order; no need to waste time and effort on conversions.

AFAIK, javascript has no list type. If you have those dates in an
array, you can use the .sort() method to put them into order, followed
by .reverse() .

But, since you have not shown a data structure, and reading your
question literally, the answer must be - there can be.

To sort an array of dates datewise, either the dates must be suitable
strings, or .sort(x) must be provided, at x, with a comparison function
for dates - possibly

function Fn(D1, D2) { return D1.valueOf() - D2.valueOf() }

See <URL:http://www.merlyn.demon.co.uk/js-dates.htm#SbDT>.

 

[Dr John Stockton]

JRS: In article <[email protected]>, seen

What I'm trying to do is have the web page placed on a web server and
have the list automatically update every time a file is uploaded. Is
there a way to do that?? The list will be on the web page.

That requires server-side coding.

That's fully on-topic AIUI; OTOH the _default_ assumption here is that
code is for execution in an Internet Web browser. See FAQ 2.2 para 1.


<FAQNONENTRY> - Jim, I can't see the new FAQ on the Web. ???

<FAQENTRY> At the end of that para, "... which host ..." - in the
default case, where the javascript is used in a Web browser, a major
point is that the author does not really know which host will be used.
Could it be rephrased? "... which type of host ..." seems better but
may not be best.