如何在ruby中为以下实现继承?红宝石继承
class Land
attr_accessor :name, :area
def initialize(name, area)
@name = name
@area = area
end
end
class Forest < Land
attr_accessor :rain_level
attr_reader :name
def name=(_name)
begin
raise "could not set name"
rescue Exception => e
puts e.message
end
end
def initialize(land, rain_level)
@name = land.name
@rain_level = rain_level
end
end
l = Land.new("land", 2300)
f = Forest.new(l, 400)
puts f.name # => "land"
想,当我为平坦L更改名称,那么就应该为子类也
l.name ="new land"
puts f.name # => "land"
改变什么预期是看跌f.name#=> “新土地”
是的,它节省了我的时间。谢谢 –