自动化测试之路（三） ruby里的get与set方法
照例可以先看端程序
class Person
def initialize( name,age=18 )
@name = name
@age = age
@motherland = "China"
end
def talk
puts "my name is "+@name+", age is "+@age.to_s
if @motherland == "China"
puts "I\'m Chinese."
else
puts "I\'m foreigner."
end
end
attr_writer :motherland
end
p1=Person.new("kaichuan",20)
p1.talk
p2=Person.new("Ben")
p2.motherland="ABC"
p2.talk
程序运行结果
my name is kaichuan, age is 20
I'm Chinese.
my name is Ben, age is 18
I'm foreigner.
>Exit code: 0
有过面向对象编程语言经历的童鞋很容易可以看明白，但是里面值的一提的是这句：“attr_writer :motherland”
这句话相当于我们面向对象编程语言的set方法，也可以这样写
def motherland=(value)
return @motherland =value
end
那么相应的get方法为 attr_ reader :motherland
相当于
def motherland
return @motherland
end
相应的 attr_accessor :motherland 相当于attr_reader:motherland； attr_writer :motherland
相关文档：
最近在看John E.Hopcroft,Rajeev Motwani,Jeffrey D.Ullman 三巨头写的Introduction to Automata Theory,Language,and Computation，想写一个Turing 机验证一下自己写的状态转移函数对不对。懒得很，网上搜了几个不错的。但Ruby Quiz 上的这个最简单。
162 Turing 机
问题描述
Quiz
description by James Edward Gray ......
Ruby 101：动态编程
Written by Allen Lee
当method_missing的魔法失效时……
在上一篇文章里，我们通过重写Hash类的method_missing方法把Hash对象模拟成匿名对象，但是，这种做法有时会产生一些莫名其妙的问题，举个例子吧，假如我把process方法（完整实现参见上一篇文� ......
require 'win32ole'
excel = WIN32OLE::new('excel.Application')
workbook = excel.Workbooks.Open('E:\RubyApp\bmk.xls')
worksheet = workbook.Worksheets(1) #get hold of the first worksheet
worksheet.Select #bring it to the front -need sometimes to run macros, not for working with a worksheet from ru ......
class Tree
def initialize
puts "Make a normal tree"
end
def decorate
puts "Make sure the tree won\'t fall"
end
end
class RedBalls < Tree
def initialize(tree)
@parent = tree;
end
def decorate
@parent.decorate
puts "Put on some red balls"
end
end
......
