30-seconds-of-code
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A collection of useful JavaScript snippets.
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Markdown
### forOwn
Iterates over all own properties of an object, running a callback for each one.
Use `Object.keys(obj)` to get all the properties of the object, `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 forOwn = (obj, fn) => Object.keys(obj).forEach(key => fn(obj[key], key, obj));
```
```js
forOwn({ foo: 'bar', a: 1 }, v => console.log(v)); // 'bar', 1
```