#静态方法的4种写法
class Test
def Test.StaticMethod1
puts "Test.StaticMethod1"
end
def self.StaticMethod2
puts "Test.StaticMethod2"
end
class << Test
def StaticMethod3
puts "Test.StaticMethod3"
end
end
class << self
def StaticMethod4
puts "Test.StaticMethod4"
end
end
end
Test.StaticMethod1
Test.StaticMethod2
Test.StaticMethod3
Test.StaticMethod4
#单例方法的2种写法
class Test
def method1
puts "method1"
end
end
t1 = Test.new
def t1.singleMethod1
puts "t1.singleMethod1"
end
class << t1
def singleMethod2
puts "t1.singleMethod2"
end
end
t2 = Test.new
t1.method1
t2.method1
t1.singleMethod1
t1.singleMethod2
#t2.singleMethod1 #将报错
#t2.singleMethod2 #将报错
