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30-seconds-of-code/snippets/lowercaseKeys.md
2017-12-29 15:33:04 +02:00

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### lowercaseKeys
Creates a new object from the specified object, where all the keys are in lowercase.
Use `Object.keys()` and `Array.reduce()` to create a new object from the specified object.
Convert each key in the original object to lowercase, using `String.toLowerCase()`.
```js
const lowercaseKeys = obj =>
Object.keys(obj).reduce((acc,key) => {acc[key.toLowerCase()] = obj[key]; return acc;},{});
```
```js
const myObj = {Name: 'Adam', sUrnAME: 'Smith'};
const myObjLower = lowercaseKeys(myObj); // {name: 'Adam', surname: 'Smith'};
```