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Alex Rivera
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Namely, how does the following code: var sup = new Array(5); sup[0] = 'z3ero'; sup[1] = 'o3ne'; sup[4] = 'f3our'; document.write(sup.length + "<br />"); output '5' for the length, when all you've done is set various elements? My 'problem' with this code is that I don't understand how length changes without calling a getLength() or a setLength() method. When I do any of the following: a.length a['length'] a.length = 4 a['length'] = 5 on a non-array object, it behaves like a dict / associative array. When I do this on the array object, it has special meaning. What mechanism in JavaScript allows this to happen? Does JavaScript have some type of property system which translates a.length a['length'] into "get" methods and a.length = 4 a['length'] = 5 into "set" methods?
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