week2_Mardav_Gandhi

week_2/pet.rb

@@ -46,7 +46,11 @@ def initialize(name: , animal_type_id: , food_consumed_per_day:)
 
   # Return the habitat of the pet
   def habitat
-    raise NotImplementedError # TODO
+    for (key, value) in HABITATS
+      if value.include?(animal_type_id)
+        return key
+      end
+    end
   end
 
   # Returns the cost of food required to feed the animal 
@@ -66,7 +70,7 @@ def food_cost_per_day
   # cat = Pet.new(name: 'cat', animal_type_id: 6, food_consumed_per_day: 0.4)
   # cat.food_required(28) = 11.2 (0.4 * 28)
   def food_required(days)
-    raise NotImplementedError # TODO
+    return food_consumed_per_day * days
   end
 
   # This function takes the number of `days` as the input
@@ -76,7 +80,7 @@ def food_required(days)
   # cat = Pet.new(name: 'cat', animal_type_id: 6, food_consumed_per_day: 0.4)
   # cat.food_cost(28) = 8960
   def food_cost(days)
-    raise NotImplementedError # TODO
+   return food_cost_per_day * days
   end
 
   # This function takes an array of pets and the `days`
@@ -90,7 +94,11 @@ def food_cost(days)
   # snake = Pet.new(name: 'python', animal_type_id: 4, food_consumed_per_day: 0.3)
   # Pet.cost_to_feed([cat, dog, fish, snake], 6) will return 6180.0
   def self.cost_to_feed(pets, days)
-    raise NotImplementedError # TODO
+    cost = 0
+    for pet in pets
+      cost += pet.food_cost(days)
+    end
+  return cost
   end
 
   # This function takes an array of pets as input
@@ -110,6 +118,15 @@ def self.cost_to_feed(pets, days)
   #
   # Note - Order is not important
   def self.group_by_animal_type(pets)
-    raise NotImplementedError # TODO
+    obj = Hash.new()
+    for pet in pets
+      if !obj[pet.animal_type_id]
+        obj[pet.animal_type_id] = [pet.name]
+      else
+        obj[pet.animal_type_id].push(pet.name)
+      end
+    end
+    return obj
   end
+
 end

week_2/prime_numbers.rb

@@ -13,6 +13,22 @@
 # If the user gives a invalid input like -4
 # We will raise an `ArgumentError` exception to let the caller know that
 # their function arguments were incorrect.
+
 def prime_numbers(n:)
-  raise NotImplementedError # TODO
+  raise ArgumentError, "n must be positive int" if n <= 0
+  primes = Array.new()
+
+  for i in 2..n
+    is_prime = true
+    for j in 2..(i - 1)
+      if i % j == 0
+        is_prime = false
+        break
+      end
+    end
+    primes << i if is_prime
+    i+=1
+  end
+return primes
 end
+