Newbie question:Does Ruby have the structure of hash's array like Perl does?

< ^ > P N |<>|^_>< --- | ~ ...Help

Something like below doesn't work:
   h=Hash.new
   h["a"][0]="something"
   h["a"][1]="another thing"
   
and what's the equivalence of Perl's $"?

thx,

Lei Weng