Status: New
Owner: ----
New issue 242 by kripkensteinr: getters/setters (__defineGetter__,
__defineSetter__) fail if property name is "0"
http://code.google.com/p/v8/issues/detail?id=242
V8 supports __defineGetter__ and __defineSetter__ perfectly for properties
with normal string names, like "test". However, if a getter/setter is
defined for a property with the name "0" (etc.) then things don't work. For
comparison, this does work in SpiderMonkey (Firefox).
Code and elaboration:
First, just to remind us that properties with the name "0" work ok (without
getters/setters):
var simple = { "0": "Hello" };
assert( simple["0"] === "Hello" );
assert( simple[0] === "Hello" );
And with a property with a name like "test", getters/setters work ok also:
var complicated = { value: 0 };
complicated.__defineGetter__("test", function() { return this.value; });
complicated.__defineSetter__("test", function(_value) { this.value =
_value + 100; });
assert( complicated.test !== undefined );
assert( complicated.test === 0 );
complicated.test = 721;
eval(assert( complicated.test === 821 );
complicated.test = 0;
eval(assert( complicated.test === 100 );
assert( complicated["test"] !== undefined );
assert( complicated["test"] === 100 );
complicated["test"] = 721;
assert( complicated["test"] === 821 );
complicated["test"] = 0;
assert( complicated["test"] === 100 );
But, with a property name of "0", things do not work:
complicated.__defineGetter__("0", function() { return this.value; });
// Returns undefined
complicated.__defineSetter__("0", function(_value) { this.value =
_value + 100; }); // Returns undefined
assert( complicated["0"] !== undefined ); // Fails
assert( complicated["0"] === 100 ); // Fails, etc.
complicated["0"] = 721;
assert( complicated["0"] === 821 );
complicated["0"] = 0;
assert( complicated["0"] === 100 );
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