@main[]
$h[^hash::create[]]
^for[i](1;20){
	$h.[$i][$.id[$i]]
}

^h.foreach[k;v]{$k=$v.id}[, ]

<hr />

$h2[^copy[$h]]
^h2.foreach[k;v]{$k=$v.id}[, ]



@copy[h][k;v]
$result[^hash::create[]]
^h.foreach[k;]{
	$result.[$k][$.id[$k]]
}