初学ruby 怎么把一个类导入呢
1. 例如在
Person.rb 中
Python code:
class Person
def talk
puts "nihao"
end
end
Student.rb
Python code:
class Student < Person
def talk
puts "nihao"
end
end
p = Student.new
p.talk
结果
>ruby Student.rb
Student.rb:1: uninitialized constant Person (NameError)
>Exit code: 1
经典 酷! book_simmone
自己添加require上去就行了~~~不过发现csdn ruby on rails 貌似人不多阿~~
不用那么麻烦的,在ruby中,include就可以实现继承
Python code:
class Student
include Person
def talk
puts "nihao"
end
end
相关问答:
Ruby 代码如下:
class Array
def uniq_by
seen = {}
select{ |x|
v = yield(x)
!seen[v] && (seen[v]=true)
}
end
end
求ja ......
我是用netbeans 去寫bnf
a program will ONLY accept strings based on the following grammar:
<compute> --> <value> = < ......
新年刚开始,已经有一些生猛的朋友要开始新的职场生涯了,
不知道会不会遇到这样的问题: 想找一份Ruby on rails的工作,我应该知道哪些知识 ?
还好,我并不是想指点你什么,只是想按我的思维方式展 ......