Actually, there's no reason for the prefix or suffix to be random or unguessable or whatever. http://code.google.com/p/es-lab/source/browse/trunk/src/ses/StringMap.jssimply uses "$" as a suffix.
As for the performance issues of prefix or suffixing, I haven't measured. But performance measurements are only relevant when comparing different means of being correct. As (I think) Gerald Weinberg once said "If the program doesn't need to be correct, I can make it arbitrarily fast." On Wed, Dec 28, 2011 at 8:39 AM, John-David Dalton < [email protected]> wrote: > The cross-browser differences of {}.hasOwnProperty('__proto__') and > {}.__proto__.hasOwnProperty('__proto__') are interesting and need to > be ironed out. > > As for the issue of using objects as dictionaries you can simply > prefix keys with some unique value, `var uid = 'uid' + (+new Date);`, > and then access entries like `dict[uid + key]`. This will allow value > lookups to work correctly cross-browser regardless of ES5+ or > __proto__ support. > > - JDD > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > -- Cheers, --MarkM
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