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From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups: comp.lang.javascript
Subject: Re: Recording changes to an object
Date: Thu, 05 Jul 2018 06:38:11 +0200
Organization: PointedEars Software (PES)
Lines: 31
Message-ID: <1829355.oMNUckLgyt@PointedEars.de>
References: <aYCdnU3Tes0_oLbGnZ2dnUU7-LHNnZ2d@westnet.com.au> <1620852.VI2in3QvqR@PointedEars.de> <d9423a2c-3ca3-7571-6fa0-aca40b1c6d0f@PointedEars.de> <1903c1d9-646d-4518-b566-04c17a4f4a9d@googlegroups.com> <4080171.LvFx2qVVIh@PointedEars.de> <ccc4dd35-f6b6-4c8b-8f4d-a95ea8084718@googlegroups.com>
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Michael Haufe (TNO) wrote:

> Thomas 'PointedEars' Lahn wrote:
>> Michael Haufe (TNO) wrote:
>> > Thomas 'PointedEars' Lahn wrote:
>> >> There should be a *built-in* Object.clone() or
                                                  ^^
>> >> Object.prototype.clone() method that does this, but unfortunately 
>> >> there is not yet.  So user libraries have to come to the rescue.
>> > 
>> > The issue here though is that an object is not simple a set of
>> > properties and methods. There is potentially, and probably, an
>> > associated state which is unobservable from outside the object (due to
>> > encapsulation).
>> […]
>> > As such, Object.prototype.clone() is required instead of
                                          ^^^^^^^^^^^^^^^^^^^
>> > Object.clone(), otherwise you're simply making an "observable clone".
>> 
>> How did you get that idea?  Object.prototype.clone() would just be
>> syntactic sugar:
> 
> as a minimalist I ask, why bother having both? The instance method seems
> to be the minimal requirement if you're not introducing new syntax

I did not say “both”.  Also, that is not what you were arguing.

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