How can I refactor this ruby code more?

Question

I'm trying to reactor this code. Any advice?

@contest_users = [] 
@contest.squads.each do |squad|
  @contest_users << squad.users[0]
end 

Answer 1

使用map而不是each ：

@contest_users = @contest.squads.map { |squad| squad.users.first }

Answer 2

@contest_users = @contest.squads.each_with_object([]) do |squad, array|
  array << squad.users[0]
end