Help newbie plz! Thnx for help

KELN · January 6, 2021, 10:45pm

#problem is in the end
#when i put number instead of “lol” its OK? but when i put string value - its error

class Employee
attr_reader :name

def name= (name)
if name == “”
raise “Invalid name!!!”
end
@name = name
end

def initialize (name = “Nobody”)
self.name= name
end

def show_name
puts “Name: #{@name}”
end
end

class EmployedWorker<Employee
attr_reader :salary

def salary= (salary)
if salary<0
raise “Invalid salary!!!”
end
@salary = salary
end

def initialize(salary = 0.0)
super(name)
self.salary = salary
end

def self.sonOfTheBoss(name)
EmployedWorker.new(name)
end

def show_salary
show_name
salary = @salary/365.0*14
formatted_salary = format("%.2f",salary)
puts “Salary for 14 days: $#{formatted_salary}”
end
end

me = EmployedWorker.new
me .name = "me "
me .salary = 1000000
me .show_salary

#HERE

loh = EmployedWorker.sonOfTheBoss(“lol”)

#HERE

loh.salary = 100
loh.show_salary

loop {sleep 10}

pcl · January 7, 2021, 12:29am

Well, yes. Your constructor for EmployedWorker takes a single argument, which is its salary. But your sonOfTheBoss function has called its variable name. Look at your EmployedWorker constructor:

class EmployedWorker<Employee

  def initialize(salary = 0.0)
    super(name)                    # what is 'name' supposed to be???
    self.salary = salary
  end
end

You tried to pass name to the parent class, but name is not defined. You probably wanted to write something like:

class EmployedWorker<Employee

  def initialize(name = "no name", salary = 0.0)
    super(name)
    self.salary = salary
  end
end

You can then create your instances with values:

me = EmployedWorker.new("me", 1000000)
me.show_salary

KELN · January 7, 2021, 10:10am

Thanks a lot!
I thought when I writed super(name) it will inherit all of initialize from superclass, but it didn’t

pcl · January 7, 2021, 11:51am

The way to think of it is that super is simply a method call, except that it calls the method of the same name in the parent class.