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From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups: comp.lang.javascript
Subject: Re: using Map
Date: Wed, 13 Jun 2018 18:47:44 +0200
Organization: PointedEars Software (PES)
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Xref: csiph.com comp.lang.javascript:35225

Andrew Poulos wrote:

> let objArray = new Map();
> 
> objArray.set(0, { id:0, name:'Jonah',   otherProp:321 });
> objArray.set(1, { id:1, name:'Andrew',  otherProp:648 });
> objArray.set(2, { id:2, name:'Another', otherProp:850 });
> objArray.set(3, { id:3, name:'Quite',   otherProp:146 });
> objArray.set(4, { id:4, name:'Mary',    otherProp:984 });

DRY:

  let objArray = [
    {id: 0, name: 'Jonah',   otherProp:321},
    {id: 1, name: 'Andrew',  otherProp:648},
    {id: 2, name: 'Another', otherProp:850},
    {id: 3, name: 'Quite',   otherProp:146},
    {id: 4, name: 'Mary',    otherProp:984}
  ];

  let map = new Map(objArray.map((el) => [el.id, el]));

<https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map>

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