comp.lang.javascript Google Group

Re: Its the isArray() function thing again

2008-07-27T02:10:38Z

They stopped extending Object.prototype.

javascript function does not function for all fields of repeated recordset

2008-07-27T02:03:23Z

My webpage of discussion contains a javascript powered image gallery
of small thumbnail images that when moused-over, display a larger
image that corresponds to the current moused-over thumbnail. An image
caption (whose value is populated by my alt_img database field), also
changes according to the current moused-over thumbnail image. All

Re: "Remote" javascript

2008-07-27T01:53:08Z

Yup, that's exactly what it was. Thanks.

Re: addEvent - The late entry :)

2008-07-27T00:19:52Z

David replied to me
"Yes. DOM node collections throw exceptions on slice, not arguments."
ECMA-262 3rd 15.4.4.10
"The slice function is intentionally generic; it does not require that
its this value be an Array object. Therefore it can be transferred to
other kinds of objects for use as a method. Whether the slice function

Re: addEvent - The late entry :)

2008-07-27T00:11:38Z

On Jul 26, 8:18 am, "Richard Cornford" <Rich...@litotes.demon.co.uk>
wrote:
And the fact that NodeList has been given numeric-named properties,
e.g
document.childNodes["0"]
By choosing this approach, the overhead of an extra function call can
be avoided.
function getReversedChildNodes(el) {
var kids = Array.prototype.slice.call(el. childNodes);

Re: addEvent - The late entry :)

2008-07-27T00:07:57Z

[snip]
I'm cc'ing David about this.
David, am I remembering incorrectly?
Thanks,
Peter

Re: Its the isArray() function thing again

2008-07-26T23:57:46Z

They are still extending "Object" unnecessarily with function-valued
properties that could be added to any object. Adding them to "Object"
is just confusing, in my opinion. They also choose very generic names
in shared namespaces which is another problem of theirs.
[link]

Re: Its the isArray() function thing again

2008-07-26T23:52:45Z

There is: When obj is an Array in a different frame than the Array
constructor, it would be constructed via a different Array
constructor, and so obj instanceof Array would have to be false.
otherFrame.obj instanceof otherFrame.Array would be true, though.
That was quite a long time ago.
Yes, they did.

Re: Its the isArray() function thing again

2008-07-26T23:48:26Z

Don't know. But I had forgotten about 'instanceof Array' and thats exactly
what I need for this specific problem.
I think people use the other 'weaker' methods to allow inclusion of array
like objects as well as Arrays.
Thomas is right, I really should read ECMA-262 properly.
Many thanks,
Aaron

Re: make a bar chart?

2008-07-26T23:27:21Z

There are several ways.
A horizontal line such as
<hr id="red" style="height: .8em; background-color: red; color: red;
margin-left: 0; text-align: left" />
and then use:
document.getElementById("red") .width= <computed width in px or %>
N.B.: A width set in the style is not changeable!

Re: jQuery Query about comparing jQuery references

2008-07-26T23:16:25Z

On Jul 26, 12:32 pm, Thomas 'PointedEars' Lahn <PointedE...@web.de>
wrote:
Not normative? I posted text that comes directly from the official
Ecma-262 spec. What's wrong with that?
Since the spec is in PDF, I put up a link to Bob Clary's HTML Edition.
It is directly relevant to this discussion (that you seem to be trying

FAQ Topic - How do I get my browser to report javascript errors? (2008-07-27)

2008-07-26T23:00:02Z

------------------------------ ------------------------------ -----------
FAQ Topic - How do I get my browser to report javascript
errors?
------------------------------ ------------------------------ -----------
Various browsers include mechanisms for reporting javascript
errors in more or less detail but often they need to be enabled

Re: Its the isArray() function thing again

2008-07-26T22:44:17Z

Aaron Gray meinte:
Crockford suggests
var is_array = function(v) {
return v && typeof v === "object" && v.constructor === Array;
(wont work on arrays in other windows/frames)
or
var is_array = function(v) {
return v && typeof v === "object" && typeof v.length === "number" &&
typeof v.splice === "function" && !(v.propertyIsEnumerable("leng th"));

Re: Its the isArray() function thing again

2008-07-26T22:31:43Z

Aaron Gray meinte:
Before he does it:
[link]
Gregor

Re: Its the isArray() function thing again

2008-07-26T22:36:35Z

Is there a setting where
obj instanceof Array
fails to detect an Array?
...
That's one failing right there :)
I thought they stopped doing that in later versions?
Sigh. Feature detection is good for detecting features. This is detection
by inference. This is as bad as
var isIE = document.all ? 1 : 0;