Re: using Map

From	Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups	comp.lang.javascript
Subject	Re: using Map
Date	2018-06-14 14:31 +0200
Organization	PointedEars Software (PES)
Message-ID	<1854071.sLym9PP3UP@PointedEars.de> (permalink)
References	<m7idnSrECaxLhYLGnZ2dnUU7-fvNnZ2d@westnet.com.au> <pfopa6$13s0$1@csiph.com> <AuqdnSaYXed-CL3GnZ2dnUU7-LnNnZ2d@westnet.com.au> <18902741.ZdnXStS6ea@PointedEars.de> <s5adnVTPJv1_y7_GnZ2dnUU7-SnNnZ2d@westnet.com.au>

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Andrew Poulos wrote:

> When I then did
> 
> let map2 = new Map(map);
> let map3 = new Map(map);
> let map4 = new Map(map);

First of all, you are confused.  *That* is neither what you did (as posted 
previously; I could not quote it here) nor what I suggested instead (same).

> then because everything is, I assume, being passed by reference

AISB, it is a common misconception that ECMAScript would support
call-by-reference.

> when I changed the value in one map the corresponding value in all maps
> changed as well.

No.  Why do you not read the Specification?  Why do you not try it out?

-- 
PointedEars
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Thread

get set value in array of objects Andrew Poulos <ap_prog@hotmail.com> - 2018-06-12 10:50 +1000
  Re: get set value in array of objects "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2018-06-12 16:40 +0200
  Re: get set value in array of objects "Christoph M. Becker" <cmbecker69@arcor.de> - 2018-06-12 17:12 +0200
  Re: get set value in array of objects Cezary Tomczyk <cezary.tomczyk@gmail.com> - 2018-06-12 17:36 +0200
    using Map Was: Re: get set value in array of objects Andrew Poulos <ap_prog@hotmail.com> - 2018-06-13 13:56 +1000
      Re: using Map Was: Re: get set value in array of objects Andrew Poulos <ap_prog@hotmail.com> - 2018-06-13 14:43 +1000
        Re: using Map Was: Re: get set value in array of objects Andrew Poulos <ap_prog@hotmail.com> - 2018-06-13 17:17 +1000
          Re: using Map Was: Re: get set value in array of objects Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-06-13 23:32 +0200
      Re: using Map Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-06-13 18:47 +0200
        Re: using Map Andrew Poulos <ap_prog@hotmail.com> - 2018-06-14 21:52 +1000
          Re: using Map Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-06-14 14:31 +0200
            Re: using Map Andrew Poulos <ap_prog@hotmail.com> - 2018-06-14 23:52 +1000
              Re: using Map Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-06-14 17:13 +0200
                Re: using Map "Mark-" <nospam@mapson.xyz> - 2018-06-14 16:25 +0000
          Re: using Map "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2018-06-14 16:11 +0200
  Re: get set value in array of objects Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-06-12 16:40 +0100
    Re: get set value in array of objects Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-06-13 05:18 +0200
      Re: get set value in array of objects Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-06-13 05:25 +0200
  Re: get set value in array of objects Julio Di Egidio <julio@diegidio.name> - 2018-06-14 07:11 -0700

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