LOL - as if O.p has getters! Thanks, this is more general in case of insanity.
/be > On Jun 5, 2014, at 6:09 PM, Allen Wirfs-Brock <[email protected]> wrote: > > >> On Jun 5, 2014, at 5:52 PM, Brendan Eich <[email protected]> wrote: >> >> Rick Waldron wrote: >>> >>>> * `Object.preventUndeclaredGet()` - change an object's behavior to throw >>>> an error if you try to read from a property that doesn't exist (instead of >>>> returning `undefine`). >>> >>> This can be achieved with Proxy right, or is that too cumbersome? >> >> js> var NoSuchProperty = Proxy({}, { >> has: function(target, name) { return true; }, >> get: function(target, name, receiver) { >> if (name in Object.prototype) { >> return Object.prototype[name]; >> } >> throw new TypeError(name + " is not a defined property"); >> } > > need to make sure accessor methods use the right this value: > > get: function (target, name, receiver) { > if (name in Object.prototype) return Reflect.get(Object.prototype, > name, receiver); > throw new TypeError(name + “ is not a defined property”); > } >> }); >
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