const users = [<User name="Fannar"/>, <User name="Tryggvi"/>]


before
<div>
	{users.map((user, index) => <User key={index} name={user.name} />)}
</div>


after
<div>
	{[<User key={user.id} name="Fannar"/>, <User key={} name="Tryggvi"/>]}
</div>

<User name="Fannar"/>


React.createComponent(User, { name : "fannar"}) === <User name="Fannar" />