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Chris Perry
Chris Perry

Posted on • Edited on

Make an object from a 2D array of key-value pairs (bonus: it's a one-liner!)

#javascript #es6 #programming

To make an object from a 2D array of key-value pairs in JavaScript, use the following pattern:

Object.fromEntries(new Map(arrOfKVPairs))
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Example:

const groceryInventory = [ ["apples", 10], ["bananas", 7], ["oranges", 3], ] const inventoryObj = Object.fromEntries(new Map(groceryInventory)) console.log(inventoryObj) // { apples: 10, bananas: 7, oranges: 3 }
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Combine with named destructuring for easy object reference:

const groceryInventory = [ ["apples", 10], ["bananas", 7], ["oranges", 3], ] const { apples: APPLES, bananas: BANANAS, oranges: ORANGES } = Object.fromEntries(new Map(groceryInventory)) console.log(APPLES) // 10
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