Great -- good to have library authors / maintainers on this list. I hold no brief for callee. The only issue in its favor is the cost of migrating to strict mode. A new version of Prototype that loses internal arguments.callee uses and is otherwise compatible helps.
Dojo and other Ajax folks on the list, please pipe up. / be Sent from my iPhone On Sep 12, 2008, at 6:54 PM, Tobie Langel <[EMAIL PROTECTED]> wrote: > > On Sep 11, 2008, at 14:34 , Brendan Eich wrote: > >> I snipped your words about callee, but it's used quite a bit in Ajax >> libraries, e.g, Prototype: >> >> $ grep -w callee prottype.js >> replacement = arguments.callee.prepareReplacement(replacement); >> var self = arguments.callee; >> parts.add = arguments.callee.addPair; >> >> (Prototype 1.5.1.1.) > > In Prototype, arguments.callee is used in two distinct cases: > > 1) reading a property of the callee, and > 2) recursively calling the callee. > > Case #1 is easily solved by storing the said property in a closure, > or by setting it elsewhere (where it probably would be a better fit, > anyway). > > Case #2 is easily solved by using a named function instead. For the > particular case where it is used in Prototype, the anonymous > function lies inside of a closure, so there is no chance of > triggering the JScript scope bug nor of polluting the global > namespace when naming it. > > From what I understand, ES 3.1 strict mode compliance will be opt-in > and will require at least slight source code modifications (if only > to prepend it with the 'use strict'; expression). So current > versions of Prototype (or other libs, for that matter), will not be > ES 3.1 'strict' compliant by default. > > I'm not really worried about modifying Prototype to avoid use of the > arguments.callee property. As a matter of fact, we've already done > so in a development branch for Caja compliance. > > Note that jQuery does not use arguments.callee at all. > > Best, > > Tobie > > > > > _______________________________________________ Es-discuss mailing list Es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss
