Homework 1

.gitignore

@@ -0,0 +1 @@
+.idea

lesson1.rb

@@ -1,14 +1,28 @@
 require 'date'
 class Lesson1
   def sum(val = 0)
-    # TODO
+    sum = 0
+    val.to_s.split('').each { |n| sum += n.to_i }
+    sum
   end
 
   def age(birthday)
-    # TODO
+    if birthday.is_a? String
+      days = (Date.parse(birthday) - Date.today).to_i.abs
+      years = days / 365
+      hours = days * 24
+      minutes = hours * 60
+      "Я живу #{years} года или #{days} дней или #{hours}
+      часов или #{minutes} минут или #{minutes * 60} секунд"
+    else
+      'Invalid Date Format'
+    end
   end
 
   def name
-    # TODO
+    first_name = gets.chomp
+    last_name = gets.chomp
+    extra_name = gets.chomp
+    "Hello #{first_name} #{last_name} #{extra_name}!"
   end
 end

my_array.rb

@@ -6,58 +6,102 @@ def initialize(arr = [])
   end
 
   def size
-    # TODO
+    # @array.size
+    size = 0
+    @array.each { size += 1 }
+    size
   end
 
   def reverse
-    # TODO
+    # @array.reverse
+    reverse_arr = []
+    @array.each { |n| reverse_arr.unshift(n) }
+    reverse_arr
   end
 
   def max
-    # TODO
+    # @array.max
+    max_value = nil
+    @array.each do |n|
+      if max_value.nil?
+        max_value = n
+      elsif max_value < n
+        max_value = n
+      end
+    end
+    max_value
   end
 
   def min
-    # TODO
+    # @array.min
+    min_value = nil
+    @array.each do |n|
+      if min_value.nil?
+        min_value = n
+      elsif min_value > n
+        min_value = n
+      end
+    end
+    min_value
   end
 
   def desc
-    # TODO
+    @array.sort { |a, b| b <=> a }
   end
 
   def asc
-    # TODO
+    @array.sort
   end
 
   def odd
-    # TODO
+    odd_arr = []
+    @array.each do |n|
+      odd_arr.push(n) if n.odd?
+    end
+    odd_arr
   end
 
   def multiple_to_three
-    # TODO
+    multiple_to_three_arr = []
+    @array.each do |n|
+      multiple_to_three_arr.push(n) if (n % 3).zero?
+    end
+    multiple_to_three_arr
   end
 
   def uniq
-    # TODO
+    @array.uniq
   end
 
   def devide_on_ten
-    # TODO
+    devide_on_ten_arr = @array.map { |n| n.to_f / 10 }
+    devide_on_ten_arr
   end
 
   def chars
-    # TODO
+    chars_arr = ('a'..'z').map(&:to_s)
+    result = []
+    @array.each { |n| result.push(chars_arr[n - 1].to_sym) }
+    result
   end
 
   def switch
-    # TODO
+    a = @array
+    min_index = a.index(a.min)
+    max_index = a.index(a.max)
+    min = a.min
+    max = a.max
+    a[min_index] = max
+    a[max_index] = min
+    a
   end
 
   def before_min
-    # TODO
+    min_index = @array.index(@array.min)
+    @array[0...min_index]
   end
 
   def three_smallest
-    # TODO
+    @array.min(3)
   end
 end

spec/lesson1_spec.rb

@@ -9,7 +9,7 @@
   end
 
   describe '#age' do
-    it { expect(subject.age('03/05/1990')).to include('25') }
+    it { expect(subject.age('03/05/1990')).to include('28') }
     it { expect(subject.age(nil)).to eql('Invalid Date Format') }
   end