ruby静态方法

ruby学习笔记(8)-"静态方法的4种写法"与"单例方法的2种写法"

01	#静态方法的4种写法

02	class Test

03	def Test.StaticMethod1

04	puts "Test.StaticMethod1"

05

end

06

07	def self.StaticMethod2

08	puts "Test.StaticMethod2"

09

end

10

11	class << Test

12	def StaticMethod3

13	puts "Test.StaticMethod3"

14

end

15

end

16

17	class << self

18	def StaticMethod4

19	puts "Test.StaticMethod4"

20

end

21

end

22

end

23

24	Test.StaticMethod1

25	Test.StaticMethod2

26	Test.StaticMethod3

27	Test.StaticMethod4

 

01	#单例方法的2种写法

02

03	class Test

04	def method1

05	puts "method1"

06

end

07

end

08

09	t1 = Test.new

10

11	def t1.singleMethod1

12	puts "t1.singleMethod1"

13

end

14

15	class << t1

16	def singleMethod2

17	puts "t1.singleMethod2"

18

end

19

end

20

21	t2 = Test.new

22

23	t1.method1

24	t2.method1

25	t1.singleMethod1

26	t1.singleMethod2

27	#t2.singleMethod1 #将报错

28	#t2.singleMethod2 #将报错