I'd use push @{ $hash->{'key'} }, $new out of habit personally, but if you've got a new enough perl (post 5.24.0 according to perlref; you can use back to 5.20 with a feature declaration) you could use the new postfix deref syntax push $hash->{'key'}->@*, $new instead.

Edit: Clarified version requirement.

The cake is a lie.
The cake is a lie.
The cake is a lie.

In reply to Re^2: Pushing hash ref onto array ref by Fletch
in thread Pushing hash ref onto array ref by Bod

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