$H
$H([obj]) -> Hash
Creates a Hash
(which is synonymous to “map” or “associative array” for our purposes). A convenience wrapper around the Hash
constructor, with a safeguard that lets you pass an existing Hash
object and get it back untouched (instead of uselessly cloning it).
The $H
function is the shorter way to obtain a hash (prior to 1.5 final, it was the only proper way of getting one).