Re: Fetch array of values from hashref

[LanX]

Rule of thumb for Perl:

• Replace the symbol with the ref!
• Respect precedence

h is the symbol in %h

$h_ref is the ref

demo:

  DB<1> @a = c..d

  DB<2> @h{a..d}=1..4

  DB<3> $h_ref = \%h

  DB<4> x $h_ref        # dump all
0  HASH(0x3531868)
   'a' => 1
   'b' => 2
   'c' => 3
   'd' => 4
  DB<5> x @h{@a}
0  3
1  4
  DB<6> x @{$h_ref}{@a} # play it safe
0  3
1  4
  DB<7> x @$h_ref{@a}   # brackets not needed b/c precedence already r
+espected 
0  3
1  4
  DB<8>

HTH! :)

PS: Side note: "hashslice from hashref" is the technical term for "Fetch array of values from hashref"