      "* [Test Cases](#Test-Cases)\n",
      "* [Algorithm: Hash Map Lookup](#Algorithm:-Hash-Map-Lookup)\n",
      "* [Code: Hash Map Lookup](#Code:-Hash-Map-Lookup)\n",
      "* [Algorithm: In-Place](#Algorithm:-In-Place)\n",
      "* [Code: In-Place](#Code:-In-Place)"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
 
</s> remove     "* [Clarifying Questions](#Clarifying-Questions)\n",
 </s> add     "* [Constraints and Assumptions](#Constraints-and-Assumptions)\n", </s> remove     "    * Implement both solutions"
 </s> add     "    * Implement both solutions\n",
    "* Can we assume we already have a linked list class that can be used for this problem?\n",
    "    * Yes" </s> remove     "## Clarifying Questions\n",
 </s> add     "## Constraints and Assumptions\n",
    "\n",
    "*Problem statements are often intentionally ambiguous.  Identifying constraints and stating assumptions can help to ensure you code the intended solution.*\n", </s> remove   {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "# Empty linked list\n",
    "linked_list = MyLinkedList(None)\n",
    "linked_list.remove_dupes()\n",
    "linked_list.print_list()\n",
    "# One element linked list\n",
    "head = Node(2)\n",
    "linked_list = MyLinkedList(head)\n",
    "linked_list.remove_dupes()\n",
    "linked_list.print_list()\n",
    "# Multiple elements\n",
    "# One or more duplicates\n",
    "linked_list.insert_to_front(1)\n",
    "linked_list.insert_to_front(3)\n",
    "linked_list.insert_to_front(1)\n",
    "linked_list.insert_to_front(1)\n",
    "linked_list.remove_dupes()\n",
    "linked_list.print_list()\n",
    "# No duplicates\n",
    "linked_list.remove_dupes()\n",
    "linked_list.print_list()"
   ]
  },
 </s> add 
    "* [Code: In-Place](#Code:-In-Place)\n",
    "* [Unit Test](#Unit-Test)"
      "* [Test Cases](#Test-Cases)\n",
      "* [Algorithm: Hash Map Lookup](#Algorithm:-Hash-Map-Lookup)\n",
      "* [Code: Hash Map Lookup](#Code:-Hash-Map-Lookup)\n",
      "* [Algorithm: In-Place](#Algorithm:-In-Place)\n",
    "* [Code: In-Place](#Code:-In-Place)\n",
    "* [Unit Test](#Unit-Test)"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
keep keep keep keep replace keep keep keep keep keep
 Reworked notebook: Added more detail to constraints and test cases.  Reworked unit test. 
linked-lists/remove-duplicates.ipynb