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From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups: comp.lang.javascript
Subject: Re: using Map
Date: Thu, 14 Jun 2018 14:31:56 +0200
Organization: PointedEars Software (PES)
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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?

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