On 23.11.2011 23:14, Brendan Eich wrote:
On Nov 23, 2011, at 10:29 AM, Dean Landolt wrote:
Object.prototype.count => total keys
Once upon a time, SpiderMonkey supported __count__ (acted like a readonly
accessor on Object.prototype but masqueraded as own in objects delegating to
O.p), whose value was the number of enumerable properties.
Just a small note: besides, __count__ can be supported w/o for-in
enumeration each time per reading this accessor -- via proxies (from my
old experiments: Python's "magic __names__" inc. __count__ --
https://gist.github.com/617338).
Dmitry.
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