QUESTION: Can a function be set up as a constant in JS?
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From: Andrea Giammarchi on 19 Mar 2010 12:42 On Mar 19, 1:28 pm, Thomas 'PointedEars' Lahn <PointedE...(a)web.de> wrote: > And it is less compatible. tell me which browser exactly gives you problem with instanceof ... and if you ends up with IE4 I do believe you have no features detections for those cases where try catch are essential ... so I hope you don't consider your library more robust and I have already wrote an alternative based on the true inheritance ...
From: Thomas 'PointedEars' Lahn on 19 Mar 2010 13:29 Andrea Giammarchi wrote: [Context restored] > Thomas 'PointedEars' Lahn wrote: >> > If we want rely on constructors and their prototype, why create such >> > method rather than do this check? >> > >> > if (o instanceof Map) { >> > >> > } >> > >> > it's even shorter than >> > >> > if (Map.isInstance(o)) { >> > >> > } >> And it is less compatible. > > tell me which browser exactly gives you problem with instanceof ... Those using implementations based on ECMAScript < 3, JavaScript < 1.5, or JScript < 5.0. Yes, that includes IE 4.x. > and if you ends up with IE4 I do believe you have no features > detections for those cases where try catch are essential ... try..catch can be wrapped so that a less capable compiler does not find it (so no SyntaxError there). > so I hope you don't consider your library more robust Yes, I do. > and I have already wrote an alternative based on the true inheritance ... Inheritance is beside the point here, and your alternative suggestion is not even compatible to non-Geckos. Talk about robust libraries. BTW, trimming quotes means to leave the relevant parts. PointedEars -- var bugRiddenCrashPronePieceOfJunk = ( navigator.userAgent.indexOf('MSIE 5') != -1 && navigator.userAgent.indexOf('Mac') != -1 ) // Plone, register_function.js:16
From: Asen Bozhilov on 19 Mar 2010 17:40 Thomas 'PointedEars' Lahn wrote: > That a Map instance can be recognized for what it is. This is important > because there are some methods that are only available to Map instances. > RTSL. It's a flawed argument. If you need to do it something, only with Map instances. These methods should be with `private` signatures. There no need dummy method like that for observing `private` properties. "RTSL" - Don't use repeatedly abbreviations. They are with different meaning, depend by context. And i don't need to know each abbreviation to understand your post. In that context, "RTSL" mean "Read The Source, Luke". First of all, my name isn't Luke. So that abbreviation is nonsense at all. Second, there aren't any links to your source code. Third, i was read your code using google. If you want better meaning of RTSL: Rewrite The Source, Lahn.
From: Asen Bozhilov on 19 Mar 2010 17:50 Thomas 'PointedEars' Lahn wrote: > Andrea Giammarchi wrote: > > and I have already wrote an alternative based on the true inheritance .... > > Inheritance is beside the point here, and your alternative suggestion is > not even compatible to non-Geckos. Talk about robust libraries. Are you read his code? It's compatible with any ECMA-262 implementations, because `__proto__` is valid Identifier. Of course Identifiers name like that aren't good practice. But before you blame someone, please read precisely him code. Thanks.
From: Thomas 'PointedEars' Lahn on 19 Mar 2010 19:19
Asen Bozhilov wrote: > Thomas 'PointedEars' Lahn wrote: >> Andrea Giammarchi wrote: >> > and I have already wrote an alternative based on the true inheritance >> > ... >> >> Inheritance is beside the point here, and your alternative suggestion is >> not even compatible to non-Geckos. Talk about robust libraries. > > Are you read his code? It's compatible with any ECMA-262 > implementations, because `__proto__` is valid Identifier. Of course > Identifiers name like that aren't good practice. But before you blame > someone, please read precisely him code. Thanks. (You are still writing a lot of gibberish.) Yes, he got me confused (intentionally?) with the __proto__ argument. However, it is safe to say that while his code is compatible to some non- Geckos, it is not as compatible as mine, and it certainly is not equivalent to mine (which was the point of the exercise). FYI, in the process I have updated the (hopefully-soon-to-be) next release of the ECMAScript Support Matrix¹ as follows: ECMAScript JavaScript JScript V8 JSC Opera KJS [1] 5 [15.2.4.6] 1.5 5.5.6330 2.0 525.13 5.02 4.3.4 ___ [1] Object.prototype.isPrototypeOf(Object) : boolean PointedEars ___________ ¹ <http://PointedEars.de/es-matrix> -- Prototype.js was written by people who don't know javascript for people who don't know javascript. People who don't know javascript are not the best source of advice on designing systems that use javascript. -- Richard Cornford, cljs, <f806at$ail$1$8300dec7(a)news.demon.co.uk> |