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  1. Jul 2018
  2. www.hacksparrow.com www.hacksparrow.com
    Object as JavaScript object's Key
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    1. tjfwalker 09 Jul 2018

      As of ECMAScript 2015 (ECMA-262 6th Edition / June 2015), Maps (the spec and MDN docs) can be used to store objects —or any other "arbitrary ECMAScript language values"— as keys.

      JavaScript ECMAScript ES 2015 ES6 ES2015 Objects properties attributes Map
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