$h[^hash::create[$._default[123]]]
$h.paf[not kretin]
$h.paf<br />
=$h.that=<br />

<hr />
$h[
	$.1[1]
	$._default[default value]
]
=$h.1=<br />
=$h.unknown=<br />

<hr />
^h.add[
	$.2[2]
]
=$h.1=<br />
=$h.2=<br />
=$h.unknown=<br />

<hr />
^h.add[
	$.3[3]
	$._default[new default value]
]
=$h.1=<br />
=$h.2=<br />
=$h.3=<br />
=$h.unknown=<br />