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snippets/js/s/for-own-right.md

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+---
+title: Iterate over object's own properties in reverse
+type: snippet
+language: javascript
+tags: [object]
+cover: sea-view
+dateModified: 2020-10-19T22:49:51+03:00
+---
+
+Iterates over all own properties of an object in reverse, running a callback for each one.
+
+- Use `Object.keys()` to get all the properties of the object, `Array.prototype.reverse()` to reverse their order.
+- Use `Array.prototype.forEach()` to run the provided function for each key-value pair.
+- The callback receives three arguments - the value, the key and the object.
+
+```js
+const forOwnRight = (obj, fn) =>
+  Object.keys(obj)
+    .reverse()
+    .forEach(key => fn(obj[key], key, obj));
+```
+
+```js
+forOwnRight({ foo: 'bar', a: 1 }, v => console.log(v)); // 1, 'bar'
+```