30-seconds-of-code/snippets/forOwnRight.md

A collection of useful JavaScript snippets.

### forOwnRight

Iterates over all own properties of an object in reverse, running a callback for each one.

Use `Object.keys(obj)` to get all the properties of the object, `Array.reverse()` to reverse their order and `Array.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'
```