红宝石 |结构长度（）函数

length()是 Ruby 中的一个内置方法，它返回 struct 中的成员数。

Syntax: struct_name.length()

Parameters: The function does not accepts any parameter.

Return Value: It returns the number of members in the struct.

示例 1 ：

# Ruby program for length method in struct 
    
# Include struct
Student = Struct.new(:name, :address, :dept)
  
# initialize values
detail = Student.new("Shizuka", "Washington", "CSE")
  
# length used
puts detail.length  

输出：

3

示例 2 ：

# Ruby program for length method in struct 
    
# Include struct
Student = Struct.new(:name, :address, :dept , :project)
  
# initialize values
detail = Student.new("Vishwa", "Hyderabad", "CSE" , "IOT")
  
# length used
puts detail.length  

输出：

4