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From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups: comp.lang.javascript
Subject: Re: get set value in array of objects
Date: Wed, 13 Jun 2018 05:25:49 +0200
Organization: PointedEars Software (PES)
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Thomas 'PointedEars' Lahn wrote:

> Ben Bacarisse wrote:
>> Essentially you build an array where idx[3] is a reference to the object
>> with id === 3.
> 
> A possibility:
> 
>   /* Use “= []” for an Array instance instead */
>   let id2objMap = Object.create(null);
> 
>   objArray.forEach((el) => {this[el.id] = el}, id2objMap);

  objArray.forEach(function (el) { this[el.id] = el; }, id2objMap);
 
or (probably less efficient)

  objArray.forEach((el) => {id2objMap[el.id] = el});

>   /* true */
>   id2objMap[3].id === 3

See the clarification further below for details.
 
-- 
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