Ruby,Array,Object - 选择对象

Question

#!/usr/local/bin/ruby
class OReport
   attr_accessor :id, :name
   def initialize(id, name, desc)
      @id       = id
      @name     = name
      @desc     = desc
   end
end

reports = Array.new
reports << OReport.new(1, 'One', 'One Desc')
reports << OReport.new(2, 'Two', 'Two Desc')
reports << OReport.new(3, 'Three', 'Three Desc')

我现在如何搜索2的"Reports",以便从中提取名称和描述？

Answer 1

用于find从给定条件的集合中获取对象:

reports.find { |report| report.id == 2 }
#=> => #<OReport:0x007fa32c9e85c8 @desc="Two Desc", @id=2, @name="Two">

如果您希望多个对象满足条件,并且想要所有对象而不是第一个匹配的对象,请使用select.