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[RESOLVED] quick object question

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Apr 16.2007

Does anyone know if there’s a way to check if an object has no elements?

[CODE]var myObject = new Object;
isEmpty(myObject);[/CODE]

somehow.

I know you could do this:

[CODE]function isEmpty(anObject) {
var count = 0;
for(var elem in anObject) {count++};
if(count > 0) return false;
else return true;
}[/CODE]

But that’s a trifle long-winded. I figured that if when you do for(x in object) it iterates the number of times for the number of elements in the object, there must be a simpler way to get this number….

Anyone have any idea?

Thanks, Robin.

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10 Comments(s) ↴

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@rootApr 16.2007 — check its length.

An Object is another sort of Array.
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@rootApr 16.2007 — BTW, what part of Nottingham?
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@theRatWonderauthorApr 16.2007 — Nope, doesn't work. At least not in Firefox 2.0 and therefore I'm assuming it's not W3C.

I'm at the university. I live in uni accomodation - Broadgate Park.
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@theRatWonderauthorApr 16.2007 — And if I may be so bold, an Array is another sort of Object, not the other way around. (Which is why "Object" shouldn't have an inherrent "length" method).
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@rootApr 17.2007 — I'm at the university. I live in uni accomodation - Broadgate Park.[/QUOTE]

Cant place it, is it in the Uni grounds or is that the buildings off Raleigh Island, woolaton road. As for me, I am stuck in NG3.

Anyway, yes, Objects and Arrays...

<i>
</i>count=0;
for(i in Object) count++;

Object is the object you want to iterate through and count, err, counts...
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@theRatWonderauthorApr 17.2007 — Broadgate Park is just off campus - beeston side.. :/ which means I'm even further from town than you are.

The building off raleigh island is Raleigh Park. I should have lived there instead, it's right next to the Jubilee Campus where my studies are.
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@rootApr 17.2007 — Ahh, gotcha. furthest I have been to NU is up lakeside. Your lucky to get into NU, so dont screw up or the rest of yourlife you will be kicking yourself.

I couldnt get in myself, I moved to here from a very nice place but NU wasnt taking any further admissions eventhough I was assured a place, at the last minute my placement was withdrawn, so I ended up spending 2 years on fasttrack at NTU.
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@theRatWonderauthorApr 17.2007 — So I guess the for(i in Object) method is the only way. Ah well, no matter. Thanks.
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@theRatWonderauthorApr 17.2007 — still, NTU's pretty good. U still at it? or have you finished?
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@rootApr 17.2007 — Its been a few years now.

I dont think moving to NG3 helped me, been trying to get out of this toilet for the past couple of years. Its not as bad as it used to be, the number of shootings have plumeted but hoodies are on the rise again.

So your better off out of the city!
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