Here is the compatibility list for Object.defineProperty() method. It seems that all major browsers (except Opera) implement it, so option 2 looks feasible.
Browser compatibilityBrowserSupportInternet Explorer*9* (8 but only on DOM objects and with some non standard behaviors. See above<https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Object/defineProperty#ie8-specific> .)Firefox (Gecko)*4* (2)Opera*None*Safari | Chrome | WebKit*5* | *Yes* (at least since Chrome *5*) | *Yes* 22. март 2011. 08.24, Mark S. Miller <[email protected]> је написао/ла: > > > On Tue, Mar 22, 2011 at 8:18 AM, Nebojša Ćirić <[email protected]> wrote: > >> So if we have something like this: >> >> LocaleInfo.Collator.prototype.compare = function(a, b) { >> ... >> }; >> >> How do you specify it's bound by default? >> > > Two choices: > > 1) Don't put it on the prototype. Rather, make it part of each instance > state, don't use "this" in the function, and have the function lexically > capture all the state it needs. > > 2) Put it on the prototype using a binding accessor: > > function makeBindingAccessorDescriptor(method) { > return { > get: function() { return method.bind(this); } > set: ??, enumerable: ??, configurable: ?? // according to your > intensions > }; > } > > Object.defineProperty(LocaleInfo.Collator.prototype, 'compare', > makeBindingAccessorDescriptor(function(a, > b) { > .... > })); > > > > >> >> 21. март 2011. 18.57, Mark S. Miller <[email protected]> је написао/ла: >> >> On Mon, Mar 21, 2011 at 6:37 PM, Axel Hecht <[email protected]> wrote: >>> >>>> We had discussed that. Would it make sense to specify that coll.compare >>>> would actually be a bound method? That's one of the things that had a >>>> little >>>> "oh, no good any way we do this", as Erik wouldn't know of any example we'd >>>> follow by defining a method on an object to be bound by default. >>>> >>> >>> I'm in favor of bound by default. I don't know of any examples in ES5, >>> but it's easy to specify. >>> >>> >>> >>>> >>>> Axel >>>> >>>> >>>> On 21.03.11 18:26, Mark S. Miller wrote: >>>> >>>>> >>>>> >>>>> On Mon, Mar 21, 2011 at 5:37 PM, Nebojša Ćirić <[email protected] >>>>> <mailto:[email protected]>> wrote: >>>>> >>>>> Sorry, I didn't get the difference first time around. >>>>> >>>>> Also, current fix is to do: >>>>> >>>>> array.sort(function(a,b) { return coll.compare(a,b); }); >>>>> >>>>> >>>>> Why not >>>>> >>>>> array.sort(coll.compare.bind(coll)) >>>>> >>>>> ? >>>>> >>>>> >>>>> >>>>> >>>>> 21. март 2011. 17.31, Erik Arvidsson <[email protected] >>>>> <mailto:[email protected]>> је написао/ла: >>>>> >>>>> >>>>> On Mon, Mar 21, 2011 at 17:28, Nebojša Ćirić <[email protected] >>>>> <mailto:[email protected]>> wrote: >>>>> > Started implementation of collator in Chrome and hit a >>>>> problem: >>>>> > var coll = locale.collator(); >>>>> > array.sort(coll.compare); >>>>> > Compare method gets bound to the undefined or global object >>>>> at the call >>>>> > site. Erik mentioned that this problem will be solved in >>>>> Harmony by passing >>>>> > additional "this" parameter to for-each and likes. We would >>>>> like to propose >>>>> > extending this syntax to the sort method too. >>>>> >>>>> Not exactly. I said that the Array methods on ES5 already pass >>>>> in an >>>>> optional this parameter and maybe we *could* do the same for >>>>> Array.prototype.sort in Harmony. >>>>> >>>>> > We discussed each part of the API in order to get detailed >>>>> parameters of >>>>> > each constructor and method. >>>>> > General: >>>>> > >>>>> > Add options property to each class that would give you actual >>>>> value for the >>>>> > user parameters. For example, if user asked for islamic >>>>> calendar, and we >>>>> > only have islamic-civil, we set calendar property to >>>>> islamic-civil. Allows >>>>> > developer to iterate until satisfied with the result. >>>>> > Use Unicode identifier vs. BCP47 in the API >>>>> > >>>>> > Collator: >>>>> > >>>>> > numeric - specifies numeric sort (9 comes before 12) >>>>> > ignoreVariants - ignore all of case, width and kana >>>>> > ignoreWidth, ignoreCase and ignoreKana - subvariants we may >>>>> implement to >>>>> > fine tune the behavior >>>>> > ignoreAccents - ignore accents >>>>> > ignoreSymbols - ignore punctuation and symbols >>>>> > variant - phonebook, ... - string >>>>> > >>>>> > NumberFormat: >>>>> > >>>>> > Allow patterns to specify grouping, currency symbol position >>>>> and sign >>>>> > location >>>>> > Start with ICU patterns and see if they work for everybody >>>>> > Don't support overrides for grouping separator and decimal >>>>> point for now >>>>> > Specify both currencySymbol and currencyCode as override >>>>> > >>>>> > DateTimeFormatSymbols: >>>>> > >>>>> > Added Era and day period methods (AM/PM) >>>>> > Moved all methods to DateTimeFormat class >>>>> > Remove DTFSymbols class >>>>> > >>>>> > DateTimeFormat: >>>>> > >>>>> > Specify calendar names better (move work to Unicode/LDML and >>>>> point to their >>>>> > document). >>>>> > Allow short/long dateType to get value from the system or >>>>> cloud. >>>>> > .options[skeleton] should contain best match for the given >>>>> skeleton >>>>> > >>>>> > -- >>>>> > Nebojša Ćirić >>>>> > >>>>> > _______________________________________________ >>>>> > es-discuss mailing list >>>>> > [email protected] <mailto:[email protected]> >>>>> >>>>> > https://mail.mozilla.org/listinfo/es-discuss >>>>> > >>>>> > >>>>> >>>>> >>>>> >>>>> -- >>>>> erik >>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> Nebojša Ćirić >>>>> >>>>> _______________________________________________ >>>>> es-discuss mailing list >>>>> [email protected] <mailto:[email protected]> >>>>> >>>>> https://mail.mozilla.org/listinfo/es-discuss >>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> Cheers, >>>>> --MarkM >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> es-discuss mailing list >>>>> [email protected] >>>>> https://mail.mozilla.org/listinfo/es-discuss >>>>> >>>> _______________________________________________ >>>> es-discuss mailing list >>>> [email protected] >>>> https://mail.mozilla.org/listinfo/es-discuss >>>> >>> >>> >>> >>> -- >>> Cheers, >>> --MarkM >>> >>> _______________________________________________ >>> es-discuss mailing list >>> [email protected] >>> https://mail.mozilla.org/listinfo/es-discuss >>> >>> >> >> >> -- >> Nebojša Ćirić >> > > > > -- > Cheers, > --MarkM > -- Nebojša Ćirić
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