diff -r 591b9005157e -r 97bcf8efe4e0 handouts/pep-ho.tex
--- a/handouts/pep-ho.tex	Wed Nov 04 15:35:31 2020 +0000
+++ b/handouts/pep-ho.tex	Fri Nov 06 01:07:26 2020 +0000
@@ -7,8 +7,10 @@
 \usepackage{marvosym}
 \usepackage{boxedminipage}
 
+\lstset{escapeinside={/*!}{!*/}}
+\newcommand{\annotation}[1]{\hfill\footnotesize{}#1}
 
-
+\usepackage{menukeys}
 
 
 %cheat sheet
@@ -1095,7 +1097,7 @@
 all aggregate functions are pre-defined and often you have to write your
 own recursive function for this.
 
-\subsection*{Always Produce a Result! No Exceptions!}
+%\subsection*{Always Produce a Result! No Exceptions!}
 %
 %Function should always produce a value. Exception is not thrown.
 %Whenever there is a possibility of non-value result (exception, void,
@@ -1104,7 +1106,7 @@
 %
 %Option[T]
 
-TBD
+%TBD
 
 
 \subsection*{Higher-Order Functions}
@@ -1623,63 +1625,71 @@
 \subsection*{Scala Syntax for Java Developers}
 
 Scala compiles to the JVM, like the Java language. Because of this,
-it can re-use many libraries.
+it can re-use many libraries. Here are a few hints how some Java code
+tranlsates to Scala code:\bigskip
 
+\noindent
+Variable declaration:
 \begin{lstlisting}[language=Java]
-Drink coke = getCoke();
+Drink coke = getCoke();/*!\annotation{Java}!*/
 \end{lstlisting}
 
 \begin{lstlisting}[language=Scala]
-val coke : Drink = getCoke()
+val coke : Drink = getCoke()/*!\annotation{Scala}!*/
 \end{lstlisting}
 
+\noindent
 Unit means void:
 
 \begin{lstlisting}[language=Java]
-public void output(String s) {
+public void output(String s) {/*!\annotation{Java}!*/
   System.out.println(s);
 }
 \end{lstlisting}
 
 \begin{lstlisting}[language=Scala]
-def output(s: String): Unit = println(s)
+def output(s: String): Unit = println(s)/*!\annotation{Scala}!*/
 \end{lstlisting}
 
-
+\noindent
 Type for list of Strings:
 
 \begin{lstlisting}[language=Java]
-List<String>
+List<String>/*!\annotation{Java}!*/
 \end{lstlisting}
 
 \begin{lstlisting}[language=Scala]
-List[String]
+List[String]/*!\annotation{Scala}!*/
 \end{lstlisting}
 
+\noindent
 String interpolations
 
 \begin{lstlisting}[language=Java]
-System.out.println("Hello, "+ firstName + " "+ lastName + "!");
+System.out.println("Hello, "+ first + " "+ last + "!");
+/*!\annotation{Java}!*/
 \end{lstlisting}
 
 \begin{lstlisting}[language=Scala]
-println(s"Hello, $firstName $lastName!")
+println(s"Hello, $first $last!")/*!\annotation{Scala}!*/
 \end{lstlisting}
 
-
-Java provides syntactic sugar when constructing lambda functions:
+\noindent
+Java provides syntactic some sugar when constructing anonymous functions:
 
 \begin{lstlisting}[language=Java]
 list.foreach(item -> System.out.println("* " + item));
+/*!\annotation{Java}!*/
 \end{lstlisting}
 
-In Scala, we use the => symbol with anonymous functions:
+\noindent
+In Scala, we use the \code{=>} symbol:
 
 \begin{lstlisting}[language=Scala]
-list.foreach(item => println(s"* $item"))
-\end{lstlisting}
+list.foreach(item => println(s"* $item"))/*!\annotation{Scala}!*/
+\end{lstlisting}%$
 
-new / vs case classes
+%%new / vs case classes
 
 
 \subsection*{More Info}