22 lines
598 B
Markdown
22 lines
598 B
Markdown
---
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title: Object from pairs
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tags: object,array
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expertise: beginner
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firstSeen: 2017-12-17T17:55:51+02:00
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lastUpdated: 2020-10-21T21:54:53+03:00
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---
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Creates an object from the given key-value pairs.
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- Use `Array.prototype.reduce()` to create and combine key-value pairs.
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- [`Object.fromEntries()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/fromEntries) provides similar functionality.
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```js
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const objectFromPairs = arr =>
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arr.reduce((a, [key, val]) => ((a[key] = val), a), {});
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```
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```js
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objectFromPairs([['a', 1], ['b', 2]]); // {a: 1, b: 2}
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```
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