Feminist Hacker Barbie #13037

Barbie used .any? to check if her array was empty. "Be careful", said Gloria. "If that array was an ActiveRecord::Relation, the SQL generated would sub-optimally use COUNT(*) and run a full table scan instead of only trying to access a single row with a LIMIT 1 query."

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      Barbie used .any? to check if her array was empty.  "Be careful", said Gloria.  "If that array was an ActiveRecord::Relation, the SQL generated would sub-optimally use COUNT(*) and run a full table scan instead of only trying to access a single row with a LIMIT 1 query."