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Groups > comp.lang.javascript > #33666
| From | Thomas 'PointedEars' Lahn <PointedEars@web.de> |
|---|---|
| Newsgroups | comp.lang.javascript |
| Subject | Re: Not understanding OOP stuff |
| Date | 2017-07-25 17:02 +0200 |
| Organization | PointedEars Software (PES) |
| Message-ID | <10884077.O9o76ZdvQC@PointedEars.de> (permalink) |
| References | (6 earlier) <87379msw5i.fsf@bsb.me.uk> <messages-20170723230918@ram.dialup.fu-berlin.de> <87a83ur1kp.fsf@bsb.me.uk> <3335323.kQq0lBPeGt@PointedEars.de> <871sp5ph3z.fsf@bsb.me.uk> |
Ben Bacarisse wrote:
> […] That's all part of the late binding that some people consider so
> important.
>
> […] in a message passing language the message can fail if the
> object does not implement that particular message. In your examples,
> the message sending (which is just a function call) can't fail for that
> reason.
>
> To my mind, message passing would look rather more like:
>
> var msg = ["foo", 42, 23];
> o.process_message(msg);
>
> This would succeed or fail depending on whether o's prototype chain
> included a foo method at that time.
Calling a method on an object referred to by “o” – which in OOP/UML terms is
equivalent to sending a message to an object where the call’s arguments are
the message contents – *does* fail if that object does not have, and no
object in its prototype chain has, a method of that name *at runtime*.
*That* *is* late binding.
try
{
o.foo(42, 23);
}
catch (e)
{
/* TypeError: o.foo is not a function */
}
ISTM you are confusing messages sent to objects with those appended to a
message queue (which does not need to pertain to objects). Maybe because
you are accustomed to programming languages or software systems where
object-orientation is implemented in that way.
--
PointedEars
FAQ: <http://PointedEars.de/faq> | <http://PointedEars.de/es-matrix>
<https://github.com/PointedEars> | <http://PointedEars.de/wsvn/>
Twitter: @PointedEars2 | Please do not cc me./Bitte keine Kopien per E-Mail.
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Not understanding OOP stuff bit-naughty@hotmail.com - 2017-07-21 09:11 -0700
Re: Not understanding OOP stuff JJ <jj4public@vfemail.net> - 2017-07-22 19:36 +0700
Re: Not understanding OOP stuff Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-07-23 18:12 +0200
Re: Not understanding OOP stuff Julio Di Egidio <julio@diegidio.name> - 2017-07-23 09:19 -0700
Re: Not understanding OOP stuff Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-07-23 20:10 +0100
Re: Not understanding OOP stuff Julio Di Egidio <julio@diegidio.name> - 2017-07-23 12:42 -0700
Re: Not understanding OOP stuff Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-07-23 22:03 +0100
Re: Not understanding OOP stuff Julio Di Egidio <julio@diegidio.name> - 2017-07-23 14:18 -0700
Re: Not understanding OOP stuff Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-07-24 03:22 +0100
Re: Not understanding OOP stuff Julio Di Egidio <julio@diegidio.name> - 2017-07-23 21:44 -0700
Re: Not understanding OOP stuff Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-07-24 03:49 +0100
Re: Not understanding OOP stuff Julio Di Egidio <julio@diegidio.name> - 2017-07-23 21:50 -0700
Re: Not understanding OOP stuff John G Harris <niam@jghnorth.org.uk.invalid> - 2017-07-24 19:50 +0100
Re: Not understanding OOP stuff Julio Di Egidio <julio@diegidio.name> - 2017-07-24 12:00 -0700
Re: Not understanding OOP stuff John G Harris <niam@jghnorth.org.uk.invalid> - 2017-07-25 09:29 +0100
Re: Not understanding OOP stuff Julio Di Egidio <julio@diegidio.name> - 2017-07-25 05:58 -0700
Re: Not understanding OOP stuff Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-07-24 11:04 +0200
Re: Not understanding OOP stuff Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-07-25 00:09 +0100
Re: Not understanding OOP stuff John G Harris <niam@jghnorth.org.uk.invalid> - 2017-07-25 09:20 +0100
Re: Not understanding OOP stuff Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-07-25 11:31 +0100
Re: Not understanding OOP stuff Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-07-25 17:02 +0200
Re: Not understanding OOP stuff Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-07-25 23:47 +0100
Re: Not understanding OOP stuff Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-07-27 15:15 +0200
Re: Not understanding OOP stuff Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-07-24 10:33 +0200
Re: Not understanding OOP stuff Julio Di Egidio <julio@diegidio.name> - 2017-07-24 02:13 -0700
Re: Not understanding OOP stuff John G Harris <niam@jghnorth.org.uk.invalid> - 2017-07-24 11:15 +0100
Re: Not understanding OOP stuff Julio Di Egidio <julio@diegidio.name> - 2017-07-24 03:58 -0700
Re: Not understanding OOP stuff John G Harris <niam@jghnorth.org.uk.invalid> - 2017-07-25 09:42 +0100
Re: Not understanding OOP stuff Julio Di Egidio <julio@diegidio.name> - 2017-07-25 05:59 -0700
Re: Not understanding OOP stuff John G Harris <niam@jghnorth.org.uk.invalid> - 2017-07-25 18:32 +0100
Re: Not understanding OOP stuff Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-07-23 22:42 +0200
Re: Not understanding OOP stuff Julio Di Egidio <julio@diegidio.name> - 2017-07-23 13:55 -0700
Re: Not understanding OOP stuff John G Harris <niam@jghnorth.org.uk.invalid> - 2017-07-24 11:18 +0100
Re: Not understanding OOP stuff Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-07-24 15:19 +0200
Re: Not understanding OOP stuff "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2017-07-24 10:20 -0700
Re: Not understanding OOP stuff Julio Di Egidio <julio@diegidio.name> - 2017-07-24 11:46 -0700
Re: Not understanding OOP stuff "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2017-07-25 05:37 -0700
Re: Not understanding OOP stuff John G Harris <niam@jghnorth.org.uk.invalid> - 2017-07-24 11:04 +0100
Re: Not understanding OOP stuff Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-07-24 16:04 +0200
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