Empty Array Element Variable Type?

Oct 22, 2009

What type of variable is an empty array element? I thought it was undefined, but i noticed that they have different behavior than undefined does:

var r=Array(1);
var s=r.concat([0,"",null,undefined]);
alert (s.toSource()) //==="[, 0, "", null, (void 0)]"
typeof s[0] //==="undefined"
typeof s[4] //==="undefined"

As you can see, 0 and 4 both === undefined. Yet, they don't have the same toSource()...
Is this special type named anything specific? Or more importantly, can it be detected outside of an array as being distinct from undefined? I am thinking this would be the same type as ({}).nonProp ...
I guess the question is actually, "can you tell the difference between uninitialized and undefined"?

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I have a variable that contains Form Elements. So these elements can be eitther a :text either a :check box See code below:

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[url]

Here's the CSS:

Here's the HTML:

I'm sure this isn't that hard, but I've spent more time trying to get that caption box to hide than setting up the gallery.

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Aug 19, 2011

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For example <?php the_field('domain'); ?> outputs the domain such as ds02.jamies.local in plain text.

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Code:

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Code:

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Aug 28, 2009

What I want to do is declare an empty array. so i do it like this:

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Sep 17, 2009

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Code JavaScript:
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Oct 5, 2011

I have this image gallery in which clients should be able to determine the order in which their images are shown. The sortable part works. Then I want to pass the new order to the next page called act_writeneworder.cfm (i am using coldfusion)
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Aug 13, 2010

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}
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Nov 26, 2009

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Code snipet
function fitStringToWidth(title,width,className) {
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[Code].....

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Oct 7, 2004

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below is my javascript:

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