# isWritablePropertyIn
> Test if an object's own or inherited property is writable.
## Usage
```javascript
var isWritablePropertyIn = require( '@stdlib/assert/is-writable-property-in' );
```
#### isWritablePropertyIn( value, property )
Returns a `boolean` indicating if a `value` has a writable `property`.
```javascript
var defineProperty = require( '@stdlib/utils/define-property' );
var obj = {
'foo': 'bar'
};
defineProperty( obj, 'beep', {
'configurable': false,
'enumerable': false,
'writable': false,
'value': 'boop'
});
defineProperty( obj, 'setter', {
'configurable': false,
'enumerable': false,
'set': function setter( v ) {
obj.foo = v;
}
});
var bool = isWritablePropertyIn( obj, 'foo' );
// returns true
bool = isWritablePropertyIn( obj, 'setter' );
// returns true
bool = isWritablePropertyIn( obj, 'beep' );
// returns false
```
## Notes
- Value arguments other than `null` or `undefined` are coerced to `objects`.
```javascript
var bool = isWritablePropertyIn( 'beep', 'toString' );
// returns true
```
- Property arguments are coerced to `strings`.
```javascript
var obj = {
'null': 'foo'
};
var bool = isWritablePropertyIn( obj, null );
// returns true
```
## Examples
```javascript
var isWritablePropertyIn = require( '@stdlib/assert/is-writable-property-in' );
var bool = isWritablePropertyIn( [ 'a' ], 'length' );
// returns true
bool = isWritablePropertyIn( { 'a': 'b' }, 'a' );
// returns true
bool = isWritablePropertyIn( [ 'a' ], 0 );
// returns true
bool = isWritablePropertyIn( { 'null': false }, null );
// returns true
bool = isWritablePropertyIn( { '[object Object]': false }, {} );
// returns true
bool = isWritablePropertyIn( {}, 'toString' );
// returns true
bool = isWritablePropertyIn( {}, 'hasOwnProperty' );
// returns true
bool = isWritablePropertyIn( null, 'a' );
// returns false
bool = isWritablePropertyIn( void 0, 'a' );
// returns false
```