Handy Advanced Commands

Question 1

In a class called Person, how could you make it so, that on an instance of the class it will raise an error if no name is filled in on initialize?

Answer 1

class Person
attr_reader :name

def initialize(attrs = {})
set_name(attrs[:name])
end

private

def set_name(obj)
obj == nil ? missing_name : @name = obj
end

Question 2

With the following date assigned to num, convert it to a date, and have num = the current date in string from to what it currently is plus one month. Do the same so the year is changed to 5 year ahead

Answer 2

num = ‘11/17’
num = Date.today.next_month(1).strftime(‘%m/%y’)
or
num = Date.today.next_year(5).strftime(‘%m/%y’)

Question 3

Write out the current date and make sure that 20 is printed in front of the year.

Answer 3

num = Date.today.next_year(5).strftime(‘%Y-%m-%d’)