diff --git a/Lectures/Figures/Adapter.png b/Lectures/Figures/Adapter.png
new file mode 100644
index 0000000000000000000000000000000000000000..bee9923049afbe4a18bc86df4f55ba06b0803892
Binary files /dev/null and b/Lectures/Figures/Adapter.png differ
diff --git a/Lectures/L27_DesignPatterns/DesignPatterns.tex b/Lectures/L27_DesignPatterns/DesignPatterns.tex
index ddc9cf91d7106e35a6f6d8c1b3c5591e8b6c0d45..9f4888b889a49f62f3dc1949934c98e017193e3b 100755
--- a/Lectures/L27_DesignPatterns/DesignPatterns.tex
+++ b/Lectures/L27_DesignPatterns/DesignPatterns.tex
@@ -486,7 +486,8 @@ so on. The actual execution of the command is delegated to a supplier component
\includegraphics[scale=0.8]{../Figures/command.png}
~\\
-\href{http://www.dofactory.com/net/command-design-pattern}{http://www.dofactory.com/net/command-design-pattern}
+\href{http://www.dofactory.com/net/command-design-pattern}
+{http://www.dofactory.com/net/command-design-pattern}
\end{frame}
diff --git a/Lectures/L28_ParnasTables/ParnasTables.pdf b/Lectures/L28_ParnasTables/ParnasTables.pdf
index 00c7dd4746a809e42bcd622ed7fa04eabb13a888..0232a2d9192487ae16ffb1314f6f3f54e4bb9221 100644
Binary files a/Lectures/L28_ParnasTables/ParnasTables.pdf and b/Lectures/L28_ParnasTables/ParnasTables.pdf differ
diff --git a/Lectures/L28_ParnasTables/ParnasTables.tex b/Lectures/L28_ParnasTables/ParnasTables.tex
index 5313616f6e4a7e78ea66f201644be13b49d076c2..b5b192fb77f3285f5f001ff48a25ef33f2189894 100755
--- a/Lectures/L28_ParnasTables/ParnasTables.tex
+++ b/Lectures/L28_ParnasTables/ParnasTables.tex
@@ -1,5 +1,5 @@
-%\documentclass[t,12pt,numbers,fleqn,handout]{beamer}
-\documentclass[t,12pt,numbers,fleqn]{beamer}
+\documentclass[t,12pt,numbers,fleqn,handout]{beamer}
+%\documentclass[t,12pt,numbers,fleqn]{beamer}
\usepackage{pgfpages}
\usepackage{hyperref}
@@ -83,14 +83,11 @@ TBD
\item A3
\begin{itemize}
-\item Part 1 - Solution: Mar 18
\item Part 2 - Code: due 11:59 pm Mar 26
\end{itemize}
\item A4
\bi
-\item Your own design and specification
-\item Model module for game of Freecell
\item Due April 9 at 11:59 pm
\ei
@@ -135,11 +132,30 @@ so on. The actual execution of the command is delegated to a supplier component
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\begin{frame}
+\frametitle{Command in UML}
+
+\includegraphics[scale=0.8]{../Figures/command.png}
+~\\
+\href{http://www.dofactory.com/net/command-design-pattern}
+{http://www.dofactory.com/net/command-design-pattern}
+
+%invoker can track list of previous commands
+%command can include undo execute
+%receiver actually knows how to do the calculation
+%client associates receiver and concrete command
+
+\end{frame}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
\begin{frame}
\frametitle{Adapter Design Pattern}
\structure{When have we used the adapter (or wrapper) design pattern?}
+% wrapper for sequence for A1
+% npolyVal(n, x) implemented by numpy polyfit
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -153,6 +169,18 @@ so on. The actual execution of the command is delegated to a supplier component
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\begin{frame}
+\frametitle{Adapter UML Diagram}
+
+\includegraphics[scale=0.42]{../Figures/Adapter.png}
+
+\href{https://commons.wikimedia.org/wiki/File:Adapter_using_delegation_UML_class_diagram.png}
+{Link}
+
+\end{frame}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
\begin{frame}
\frametitle{Factory Pattern}
@@ -160,6 +188,9 @@ so on. The actual execution of the command is delegated to a supplier component
\href{https://www.tutorialspoint.com/design_pattern/factory_pattern.htm}{Code}
+% create object without exposing the creation logic, refer to newly created
+% object using a common interface.
+% Client is decoupled from the implementation details of derived classes
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -260,6 +291,10 @@ designs
%sp is set point
%e mean enumerated type
%subscript -1 means previous value
+~\\
+~\\
+\structure{What is this table specifying?}
+
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -367,12 +402,15 @@ If Condition 1 then f\_name = Result 1\\
Elseif Condition 2 then f\_name = Result 2\\
Elseif ...\\
Elseif Condition n then f\_name = Result n\\
+or f\_name = (Condition 1 $\Rightarrow$ Result 1 $|$ ...)
+
~\newline
\uncover<2->{\structure<2>{Disjointedness $\equiv$
$\forall (i, j: \mathbb{N} | 1 \leq i \leq n \wedge 1 \leq j \leq n \wedge i \neq j : \mbox{Condition } i \wedge
\mbox{Condition } j \Leftrightarrow \mbox{false})$\\
~\\
-Completeness $\equiv \vee (i: \mathbb{N} | 1 \leq i \leq n : \mbox{Condition } i )$}}
+Completeness $\equiv \vee (i: \mathbb{N} | 1 \leq i \leq n : \mbox{Condition } i
+)$}}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -430,8 +468,8 @@ Horizontal condition tables \\
\frametitle{World View of Tables}
\bi
-\item \structure{Do tables take a dynamic or a static world view?}
-\item \structure{Can you write an algorithm with a table?}
+\item \structure{Do tables take a dynamic or a static world view?} %static
+\item \structure{Can you directly write an algorithm from a table?} %maybe
\ei
\end{frame}
@@ -484,7 +522,7 @@ sequences of operations
\begin{itemize}
-\item Consider all of the cases
+\item Consider all of the cases for a rectangle
\item Draw a picture
\item Short form notation
\begin{itemize}
@@ -495,6 +533,7 @@ sequences of operations
\item $llxw = \mathit{lower\_left}.\mbox{xcoord()} + \mathit{width}$
\item $llyh = \mathit{lower\_left}.\mbox{ycoord()} + \mathit{height}$
\item T = Constants.TOLERANCE
+\item $p1$.dist$(p2$) is the distance between p1 and p2
\end{itemize}
\end{itemize}
@@ -623,4 +662,16 @@ $p.\mbox{dist}(\mbox{PointT}(llxw, llyh)) ] \leq \mbox{T}$}\\
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\begin{frame}
+\frametitle{Nine Cases, but 2D}
+
+\bi
+\item \structure{How would you write all 9 cases, but with a tabular form that
+ closely matches the original 2D problem description?}
+\ei
+
+\end{frame}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
\end{document}
\ No newline at end of file