scope_locals_with_tap.rb

# started at
create :up_vote_activity, created_at: 1.day.from_now
create :comment_activity, created_at: 1.day.from_now

# introduce local
created_at = 1.day.from_now
create :up_vote_activity, created_at: created_at
create :comment_activity, created_at: created_at

# Object#tap to scope local
1.day.from_now.tap do |created_at|
  create :up_vote_activity, created_at: created_at
  create :comment_activity, created_at: created_at
end