# propertiesIn
> Return an array of an object's own and inherited property names and [symbols][@stdlib/symbol/ctor].
## Usage
```javascript
var propertiesIn = require( '@stdlib/utils/properties-in' );
```
#### propertiesIn( obj )
Returns an `array` of an object's own and inherited property names and [symbols][@stdlib/symbol/ctor].
```javascript
var props = propertiesIn( [] );
// returns [...]
```
## Examples
```javascript
var hasSymbolSupport = require( '@stdlib/assert/has-symbol-support' );
var Symbol = require( '@stdlib/symbol/ctor' );
var propertiesIn = require( '@stdlib/utils/properties-in' );
var hasSymbols;
var props;
var obj;
hasSymbols = hasSymbolSupport();
function Foo() {
this.a = 'b';
if ( hasSymbols ) {
this[ Symbol( 'a' ) ] = 'b';
}
return this;
}
Foo.prototype.foo = 'bar';
if ( hasSymbols ) {
Foo.prototype[ Symbol( 'foo' ) ] = 'bar';
}
obj = new Foo();
props = propertiesIn( obj );
console.log( props );
// e.g., => [ 'a', 'foo', ... ]
```
[@stdlib/symbol/ctor]: https://www.npmjs.com/package/@stdlib/symbol-ctor