Hide div A if div B is empty

Question

I would like to hide div A when Div B has no content inside, I have tried multiple strings of code but I think I am completely missing the idea, here is what I have currently tried

if( $('#b').is(':empty') ) {
$('#a').hide;
}

Answer 1

 if( $('#b').text()=='' ) { $('#a').hide(); } 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script> <div id ='a'>asdasdasd</div> <div id='b'></div>