WeakMap better than Private Symbols? (was: direct_proxies "problem")

Domenic Denicola domenic at domenicdenicola.com
Thu Jan 10 12:04:24 PST 2013


Really?? http://people.mozilla.org/~jorendorff/es6-draft.html#sec-15.15.5

________________________________
From: es-discuss-bounces at mozilla.org [es-discuss-bounces at mozilla.org] on behalf of Rick Waldron [waldron.rick at gmail.com]
Sent: Thursday, January 10, 2013 14:57
To: Nathan Wall
Cc: es-discuss at mozilla.org
Subject: Re: WeakMap better than Private Symbols? (was: direct_proxies "problem")




On Thu, Jan 10, 2013 at 11:22 AM, Nathan Wall <nathan.wall at live.com<mailto:nathan.wall at live.com>> wrote:
    // ES6 WeakMap

    let timeMap = new WeakMap(),
        // Store WeakMap methods to maintain integrity of the internal state.
        WeakMapGet = Function.prototype.call.bind(WeakMap.prototype.get),
        WeakMapSet = Function.prototype.call.bind(WeakMap.prototype.set);


Just a heads up, this is unnecessary and actually won't work at all. WeakMap has nothing defined on its prototype property—all methods are late-bound to the instance for the same reason you mention in the comment. https://gist.github.com/4505255

Rick

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