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snippets/object-from-pairs.md

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