ruby - 在 ruby​​ 中排序列表

Question

我有以下类(class) Linea

class Linea
   include Comparable
   attr_accessor :maxcap, :capatuale, :citta1, :citta2, :lineac

   def initialize(c1, c2, maxc)
      raise CapacitaIllegale if maxc <= 0
      @maxcap = maxc
      @capatuale = maxc
      @citta1 = c1
      @citta2 = c2
      @lineac = []
      @lineac.push(c1)
      @lineac << c2
   end

    def <=> (l)
      if(l.is_a?(Linea))
        if (l.maxcap>@maxcap)
          return l.maxcap
        end
        if(l.maxcap==@maxcap)
          if (l.citta1.pop + l.citta2.pop>@citta1.pop+@citta2.pop)
            return l.maxcap
          end
        end
      end
      return -1
    end
  end

在 Rete 类中我想插入 Linea 并使用 <=> 进行排序之后；

  class Rete
     attr_accessor :lineec, :guasto_seg

     def initialize()
      @rete = []
      @guasto_seg = []
     end

     def aggiungi_linea(c1, c2, maxc)
        l = Linea.new(c1, c2, maxc)
        unless (citta_presente(c1, c2))
           @rete << l
           @rete.sort { |l1,l2| l1<=>l2 if l1.is_a?(Linea) and l2.is_a?(Linea) }
        else
           raise LineaGiaEsistente
        end
     end

     + some diferent method   

  end

我想问一下它是如何用于排序的解释，如果我的是正确的，如果 <=> 完成并调用排序那么正确。？？？？？？请尽快给我答复，谢谢。

Answer 1

为了有助于排序，<=>方法必须像这样:

big_linea <=> small_linea #=> 1
big_linea <=> equally_big_linea #=> 0
small_linea <=> big_linea #=> -1

当它起作用时，你应该能够做到

@rete.sort #no block needed