Is it possible to create dynamic var

[DL]

For instance,

function addNew(i) {
var 'element'&i
...
}

If possible, how to?

Thanks.

[Laser Lips]

You can use the eval function....

var somVar ="SomeValue" ;

var Elementname = "var yourName" + somVar + "='Hello';" ;

eval(Elementnam e);
alert(yourNameS omeValue);

Graham

[Thomas 'PointedEars' Lahn]

DL wrote:

For instance,

function addNew(i) {
var 'element'&i
..
}

If possible, how to?

While eval() is a possibility, and a bad one at that, chances
are that you really don't need what you want. Consider this:

function addNew(i)
{
var a = [];
a[i] = 42;
...
}
PointedEars
--
Anyone who slaps a 'this page is best viewed with Browser X' label on
a Web page appears to be yearning for the bad old days, before the Web,
when you had very little chance of reading a document written on another
computer, another word processor, or another network. -- Tim Berners-Lee

[Laser Lips]

On May 10, 3:34*pm, Thomas 'PointedEars' Lahn <PointedE...@we b.de>
wrote:

DL wrote:

For instance,

function addNew(i) {
var 'element'&i
..
}

If possible, how to?

While eval() is a possibility, and a bad one at that, chances
are that you really don't need what you want. *Consider this:

* function addNew(i)
* {
* * var a = [];
* * a[i] = 42;
* * ...
* }

PointedEars
--
Anyone who slaps a 'this page is best viewed with Browser X' label on
a Web page appears to be yearning for the bad old days, before the Web,
when you had very little chance of reading a document written on another
computer, another word processor, or another network. -- Tim Berners-Lee

What alternatives are there?

[DL]

On May 10, 10:34*am, Thomas 'PointedEars' Lahn <PointedE...@we b.de>
wrote:

DL wrote:

For instance,

function addNew(i) {
var 'element'&i
..
}

If possible, how to?

While eval() is a possibility, and a bad one at that, chances
are that you really don't need what you want. *Consider this:

* function addNew(i)
* {
* * var a = [];
* * a[i] = 42;
* * ...
* }

Thank you both. I kind of like the above approach, it does not seem
to solve the problem.
Here's more detail:

function addNew(i) {
var newF = document.getEle mentById('tbl') ;
var a = [];
a[i] = newF.insertRow( );
// ...
}

The above code failed. A related question, how to increment a value?
The following won't work
// the i value is param for a function like the above one, not be
concerned
var rowCount = 1;
rowCount = eval(rowCount + i);
alert (rowCount);

[VK]

On May 10, 7:53 am, DL <tatata9...@gma il.comwrote:

For instance,

function addNew(i) {
var 'element'&i
..

}

If possible, how to?

Javascript is not a prehistoric BASIC subset for such perversions. If
you need uniformly accessible elements of unknown in advance amount
then use array:

var myElements = new Array;

function addNew(i) {
myElements[i] = whatever;
}

If you really need properties named like "foo1', "foo2" etc. then use
object's squared brackets notation:

var myElements = new Object;

function addNew(i) {
myElements['foo'+i] = whatever;
}

[Dr J R Stockton]

In comp.lang.javas cript message <876f5ddc-6d98-4995-b0d0-8c8e110522e5@s5
0g2000hsb.googl egroups.com>, Sat, 10 May 2008 07:31:42, Laser Lips
<lo*********@gm ail.composted:

>You can use the eval function....

var somVar ="SomeValue" ;

var Elementname = "var yourName" + somVar + "='Hello';" ;

eval(Elementna me);
alert(yourName SomeValue);

If you had read the newsgroup FAQ carefully, and its Notes, you would
have known better than to suggest that.

It's a good idea to read the newsgroup c.l.j and its FAQ. See below.

--
(c) John Stockton, nr London UK. ?@merlyn.demon. co.uk IE7 FF2 Op9 Sf3
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.

[DL]

On May 10, 6:45*pm, VK <schools_r...@y ahoo.comwrote:

On May 10, 7:53 am, DL <tatata9...@gma il.comwrote:

For instance,

function addNew(i) {
var 'element'&i
..

}

If possible, how to?

Javascript is not a prehistoric BASIC subset for such perversions. If
you need uniformly accessible elements of unknown in advance amount
then use array:

var myElements = new Array;

function addNew(i) {
*myElements[i] = whatever;

}

If you really need properties named like "foo1', "foo2" etc. then use
object's squared brackets notation:

var myElements = new Object;

function addNew(i) {
*myElements['foo'+i] = whatever;

}- Hide quoted text -

- Show quoted text -

Thanks. First let me get simple thing off the list first, your

var myElements = new Array;
is probably similar to
var myElements = []; // the later is a short form probably, yes?

Now, back to the main topic. Also, I should have been clearer about
the intent of the code, that is, to dynamically add TR or (TRs) for an
existing table with ID of 'tbl'.

Neither Array nor Object works for this case while
by doing so by hand, e.g.
var newF = document.getEle mentById('tbl') ;
var tr1 = newF.insertRow( );

would work. But

var newF = document.getEle mentById('tbl') ;
var myElements = new Array;

function addNew(i) {
myElements[i] = newF.insertRow( );

won't work.

It seems to be me pretty odd that javascript can't handle 'dynamic
variable assignment'

Thanks.

[DL]

On May 10, 10:06*pm, DL <tatata9...@gma il.comwrote:

On May 10, 6:45*pm, VK <schools_r...@y ahoo.comwrote:

On May 10, 7:53 am, DL <tatata9...@gma il.comwrote:

For instance,

function addNew(i) {
var 'element'&i
..

}

If possible, how to?

Javascript is not a prehistoric BASIC subset for such perversions. If
you need uniformly accessible elements of unknown in advance amount
then use array:

var myElements = new Array;

function addNew(i) {
*myElements[i] = whatever;

}

If you really need properties named like "foo1', "foo2" etc. then use
object's squared brackets notation:

var myElements = new Object;

function addNew(i) {
*myElements['foo'+i] = whatever;

}- Hide quoted text -

- Show quoted text -

Thanks. *First let me get simple thing off the list first, your

var myElements = new Array;
is probably similar to
var myElements = []; // the later is a short form probably, yes?

Now, back to the main topic. *Also, I should have been clearer about
the intent of the code, that is, to dynamically add TR or (TRs) for an
existing table with ID of 'tbl'.

Neither Array nor Object works for this case while
by doing so by hand, e.g.
var newF = document.getEle mentById('tbl') ;
var tr1 = newF.insertRow( );

would work. But

var newF = document.getEle mentById('tbl') ;
var myElements = new Array;

*function addNew(i) {
*myElements[i] = newF.insertRow( );

won't work.

It seems to be me pretty odd that javascript can't handle 'dynamic
variable assignment'

Thanks.- Hide quoted text -

- Show quoted text -

Ok, you guys are right, I don't even need dynamic vars. Now got a
minor question,
the following attempt of setting a newly created cell alignment to
right won't work,
e.g. newCell1.style. align = "right";
what's wrong?

Thanks.

[Andrew Poulos]

DL wrote:

Ok, you guys are right, I don't even need dynamic vars. Now got a
minor question,
the following attempt of setting a newly created cell alignment to
right won't work,
e.g. newCell1.style. align = "right";
what's wrong?

Shouldn't it be
newCell1.style. textAlign = "right";

Andrew Poulos