# inheritedProperties
> Return an array of an object's inherited property names and [symbols][@stdlib/symbol/ctor].
## Usage
```javascript
var inheritedProperties = require( '@stdlib/utils/inherited-properties' );
```
#### inheritedProperties( obj\[, level] )
Returns an `array` of an object's inherited property names and [symbols][@stdlib/symbol/ctor].
```javascript
var props = inheritedProperties( [ 1, 2, 3 ] );
// returns [...]
```
By default, the function walks an object's entire prototype chain. To limit the inheritance level, provide a `level` argument.
```javascript
var props = inheritedProperties( [ 1, 2, 3 ], 1 );
```
## Examples
```javascript
var hasSymbolSupport = require( '@stdlib/assert/has-symbol-support' );
var Symbol = require( '@stdlib/symbol/ctor' );
var defineProperty = require( '@stdlib/utils/define-property' );
var inheritedProperties = require( '@stdlib/utils/inherited-properties' );
var hasSymbols;
var props;
var obj;
hasSymbols = hasSymbolSupport();
function Foo() {
this.a = 'b';
defineProperty( this, 'foo', {
'configurable': false,
'enumerable': false,
'writable': false,
'value': 'bar'
});
if ( hasSymbols ) {
this[ Symbol( 'a' ) ] = 'b';
defineProperty( this, 'beep', {
'configurable': false,
'enumerable': false,
'writable': false,
'value': 'boop'
});
}
return this;
}
Foo.prototype.c = 'd';
defineProperty( Foo.prototype, 'bip', {
'configurable': false,
'enumerable': false,
'writable': false,
'value': 'bap'
});
if ( hasSymbols ) {
Foo.prototype[ Symbol( 'c' ) ] = 'd';
defineProperty( Foo.prototype, Symbol( 'e' ), {
'configurable': false,
'enumerable': false,
'writable': false,
'value': 'f'
});
}
obj = new Foo();
props = inheritedProperties( obj );
console.log( props );
// => [ ..., 'c', 'bip', ... ]
```
[@stdlib/symbol/ctor]: https://www.npmjs.com/package/@stdlib/symbol-ctor