homework

array-list.rb

@@ -2,27 +2,53 @@
 
 class ArrayList
   def initialize
-    @storage = []
+    @storage = [0,0,0,0,0]
+    @size = 0
   end
 
   def add(value)
+    @storage[@size] = value
+    @size += 1
   end
 
-  def delete(value)
+  #'deletes' the last value
+  def delete
+    @size -= 1
   end
 
   def display
+    @size.times do |i|
+      puts @storage[i]
+    end
   end
 
   def include?(key)
+    @size.times do |i|
+      if @storage[i] == key
+        return true
+      end
+    end
+    return false
   end
 
   def size
+    return @size
   end
 
   def max
+    return nil if empty?
+    biggest = 0
+    @size.times do |i|
+      if @storage[i] > @storage[biggest]
+        biggest = i
+      end
+    end
+    returns @storage[biggest]
   end
 
+  def empty?
+    @size == 0
+  end
 end
 
 # Initializing an Array List
@@ -36,6 +62,6 @@ def max
 puts "Displaying Array List:"
 arr.display
 
-puts "Delete 10 and then display the array list:"
-arr.delete(10)
+puts "Delete last element and then display the array list:"
+arr.delete
 arr.display

linked-list.rb

@@ -5,9 +5,9 @@
 class Node
    attr_accessor :value, :next_node
 
-   def initialize(val,next_in_line=null)
+   def initialize(val,next_in_line=nil)
        @value = val
-       @next_nodex = next_in_line
+       @next_node = next_in_line
        puts "Initialized a Node with value:  " + value.to_s
    end
 end
@@ -63,12 +63,36 @@ def display
    end
 
    def include?(key)
+     current = @head
+     while current != nil
+       if current.value == key
+         return true
+       end
+       current = current.next_node
+     end
+     return false
    end
 
    def size
+     size = 0
+     current = @head
+     while current != nil
+       size += 1
+       current = current.next_node
+     end
+     return size
    end
 
    def max
+     current_max = 0
+     current = @head
+     while current != nil
+       if current.value > current_max
+         current_max = current.value
+       end
+       current = current.next_node
+     end
+     return current_max
    end
 
 end