Here's what I'm doing now:
$A(attr.edges).each(function(edge) {
edge.set(id, new GraphEdge(cv, id, edge));
}, this);
Same result. The iterator.length shows zero and the inside of the
loop never executes. But the iterator is (correctly, I think) 'Object
Brainwriting =Object'
Just casting around, I also tried taking off the binding to 'this' at
the end, doesn't help.
As before, I'm not getting why anything whatsoever that's in an array
shouldn't automatically return length > 0.
On Jul 14, 1:47 pm, Matt Foster <[email protected]> wrote:
> > $A(attr.edges).each(function(edge) {
> > this.edge.set(id, new GraphEdge(cv, id, edge));
> > }, this);
>
> edge is your variable, why bother trying to set function ownership?
> The function is sent the parameter it needs to act upon. Just remove
> "this" from your "this.edge..." line and you should be good.
>
> --
>
> http://positionabsolute.net
>
> On Jul 14, 2:28 pm, ronman <[email protected]> wrote:
>
> > This is a newbie question, but I learn a lot every time I ask.
>
> > Why do some objects return a zero length?
>
> > I'm doing Array.each. In the array at this particular time is a
> > single object. Firebug describes that object as
>
> > Object Brainwriting color=black penwidth=0.5 fontname=Arial
>
> > and I iterate through the array this way:
> > $A(attr.edges).each(function(edge) {
> > this.edge.set(id, new GraphEdge(cv, id, edge));
> > }, this);
>
> > But in Prototype's each method the 'edge' iterator (the Brainwriting
> > Object), returns zero length:
> > function $A(iterable) {
> > if (!iterable) return [];
> > if (iterable.toArray) return iterable.toArray();
> > var length = iterable.length || 0, results = new Array(length);
> > // LENGTH NOW IS ZERO
> > while (length--) results[length] = iterable[length];
> > return results;
>
> > }
>
> > Maybe the Brainwriting Object is not iterable, but I would expect $A
> > (attr.edges) to have made it so before my call to each().
>
> > Surely I'm not expected to assign a length attribute to objects myself
> > - just lilke 'penwidth' and 'color' were assigned - in order to make
> > Array.each() work on objects. Why doesn't the Object.length return
> > non-zero when any kind of Object is instantiated?
>
> > I'm using Firefox 3.0.10.
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