I wouldn't use isin the way you have it, and frankly it's seldom to see people use it in that fashion. It doesn't matter it works correctly. isin has its convenience and downfalls and is generally considered less appropriate in your example. I stand my ground.
Are you sure you want to unfollow this person?
Are you sure you want to delete this?
Click "Unsubscribe" to stop receiving notices pertaining to this post.
Click "Subscribe" to resume notices pertaining to this post.