node hw

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)
+  def delete
+    return nil if empty?
+    @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
+    return @storage[biggest]
   end
 
+  def empty?
+    @size == 0
+  end
 end
 
 # Initializing an Array List
@@ -37,5 +63,5 @@ def max
 arr.display
 
 puts "Delete 10 and then display the array list:"
-arr.delete(10)
+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=nill)
        @value = val
-       @next_nodex = next_in_line
+       @next_node = next_in_line
        puts "Initialized a Node with value:  " + value.to_s
    end
 end
@@ -63,9 +63,22 @@ def display
    end
 
    def include?(key)
+    current = @head
+    while current != nil
+      return true if current.value == key
+      current = current.next_node
+    end
+    return false
    end
 
    def size
+    current = @head
+    @size = 0
+    while current != nil
+      @size += 1
+      current = current.next_node
+    end
+    return @size
    end
 
    def max