ruby - 如何使用Array#select或其他方法缩短此枚举语句？

Question

我有以下7行代码,如何让它们更短,更少罗嗦？

max_group_size = 0
wrong_services.each do |service|
  group_size = service.iep_service.group_size
  if group_size > max_group_size then
    max_group_size = group_size
  end
end

Answer 1

max_group_size = wrong_services.map {|service| service.iep_service.group_size }.max