# uppercaseKeys
> Convert each object key to uppercase.
## Usage
```javascript
var uppercaseKeys = require( '@stdlib/utils/uppercase-keys' );
```
#### uppercaseKeys( obj )
Converts each `object` key to uppercase, mapping the transformed keys to a new `object` having the same values.
```javascript
var obj1 = {
'a': 1,
'b': 2
};
var obj2 = uppercaseKeys( obj1 );
// returns { 'A': 1, 'B': 2 }
```
## Notes
- The function only transforms **own** properties. Hence, the function does **not** transform inherited properties.
- The function **shallow** copies key values.
## Examples
```javascript
var uppercaseKeys = require( '@stdlib/utils/uppercase-keys' );
var obj1 = {
'a': 'beep',
'b': 'boop',
'c': 'foo',
'd': 'bar'
};
var obj2 = uppercaseKeys( obj1 );
console.dir( obj2 );
// => { 'A': 'beep', 'B': 'boop', 'C': 'foo', 'D': 'bar' }
```