CODEWITHSUNDEEP
rubyclass
shanahobo86
shanahobo86

Reputation: 497

Classes in ruby

Recently started learning ruby and I've created a class for family members that contains name, age, sex, marital status, and traits. I am trying to write a method that will determine if a family member is a parent and if whether or not its the mother or the father.

so the code for the method is as follows:

def is_father?(age, sex)
    if age > 30
      puts "is parent"
          if sex == "Male"
            then puts "is father"
          else puts "not father"
          end
    end
  end

And a family member might look like this:

fm1=Family.new("John", "Male", 54, "Married", "Annoying")

after being initialized like this:

class Family
  def initialize(name, sex, age, status, trait)
    @fam_name=name
    @fam_sex=sex
    @fam_age=age
    @fam_stat=status
    @fam_trait=trait
  end
end

If a person contains the previously mentioned characteristics, how do I just pass age + sex into this method? Thanks in advance for your help

Upvotes: 0

Views: 174

Answers (3)

megas
megas

Reputation: 21791

Using Struct can save a banch of code

class Family < Struct.new(:name, :sex, :age, :status, :trait)
  # define methods in usual manner
end

f = Family.new("John", 'male') #<struct Family name="John", sex="male", age=nil, status=nil, trait=nil>

Upvotes: 0

user904990
user904990

Reputation:

Once you initialized age/sex/etc you can use them in any method by @age/@sex/@etc

def is_father?(age = nil, sex = nil)
    if (age || @age) > 30
        puts "is parent"
    end
    if (sex || @sex) == "Male"
        puts "is father"
    else 
        puts "not father"
    end
end

In example above if you pass values to the method, they will be used instead ones set at initialization

Upvotes: 0

knut
knut

Reputation: 27845

You must store your data during initialization in attributes. later you can use them without using parameters of the method.

Example:

class Family
   def initialize(name, sex, age, status, trait)
    @fam_name=name
    @fam_sex=sex
    @fam_age=age
    @fam_stat=status
    @fam_trait=trait
  end
  def is_parent?; @fam_age > 30;end
  def is_father?
    is_parent? and @fam_sex == "Male"
  end
  def to_s
    result = @fam_name.dup
    if @fam_age > 30
      result <<  " is parent and is "
          if @fam_sex == "Male"
            result << "father"
          else 
            result << "not father"
          end
      end
    result
  end
end

fm1=Family.new("John", "Male", 54, "Married", "Annoying")
puts fm1.ilding is_parent?
puts fm1.is_father?
puts fm1

Remarks:

  • I modified your is_father? - methods ending on ? normally returns a boolean value.
  • I moved your text building to method to_s. to_s is called if you print your object with puts.
  • Better you avoid puts inside your methods. Most of the times, it is better to return an answer string and make the puts when you call the method.

Perhaps I misunderstand your request.

If is_father? is no method of Family and you need access to the attributes, then you must define a getter method:

class Family
  def initialize(name, sex, age, status, trait)
    @fam_name=name
    @fam_sex=sex
    @fam_age=age
    @fam_stat=status
    @fam_trait=trait
  end
  attr_reader :fam_sex
  attr_reader :fam_age
end

fm1=Family.new("John", "Male", 54, "Married", "Annoying")
puts fm1.fam_sex
puts fm1.fam_age


is_father?(fm1.fam_age, fm1.fam_sex)

Upvotes: 1

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