@stdlib/utils/common-keys/README.md

Standard utilities.

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# commonKeys

> Return the common own property names of two or more objects.

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## Usage

```javascript
var commonKeys = require( '@stdlib/utils/common-keys' );
```

#### commonKeys( obj1, obj2\[, obj3\[,...,objN]] )

Returns the common own property names of two or more objects.

```javascript
var obj = {
    'a': 1,
    'b': 2,
    'c': 3
};

var obj2 = {
    'a': 1,
    'b': 2
};

var keys = commonKeys( obj, obj2 );
// returns [ 'a', 'b' ]
```

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## Examples

<!-- eslint no-undef: "error" -->

```javascript
var commonKeys = require( '@stdlib/utils/common-keys' );

function Foo() {
    this.beep = 'boop';
    this.a = {
        'b': 'c'
    };
    return this;
}

Foo.prototype.foo = [ 'bar' ];

var obj1 = new Foo();

var obj2 = {
    'beep': 'boop',
    'foo': 'bar'
};

var keys = commonKeys( obj1, obj2 );
// returns [ 'beep' ]
```

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