The expression (fetchrow_hashref($dbh, $query))[0] evaluates to a hashref. You can dereference a key from any hashref by using EXPR->{key}. You can also omit the arrow operator if EXPR ends with an array or hash index.

Putting that together gives: 

print +(fetchrow_hashref($dbh, $query))[0]{key}, "\n";

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You need the + to disambiguate the expression from print(). All in all, it's a little messy, and having the extra variable is a reasonable tradeoff for readability.

Update: ysth is dead on, you do need the arrow!

blokhead

In reply to Re: Dereferencing array of hashrefs by blokhead
in thread Dereferencing array of hashrefs by Guildencrantz

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