\documentclass[dvipsnames,14pt,t,xelatex]{beamer}+
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\usepackage{../slides}+
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\usepackage{../graphics}+
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\usepackage{../langs}+
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%\usepackage{../data}+
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\hfuzz=220pt +
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%\setmonofont[Scale=.88]{Consolas}+
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%\newfontfamily{\consolas}{Consolas}+
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\lstset{language=Scala,+
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        style=mystyle,+
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        numbersep=0pt,+
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        numbers=none,+
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        xleftmargin=0mm}+
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\newcommand{\bl}[1]{\textcolor{blue}{#1}}     +
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% beamer stuff +
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\renewcommand{\slidecaption}{PEP (Scala) 01, King's College London}+
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\begin{document}+
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%+
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\begin{frame}[t]+
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\frametitle{%+
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  \begin{tabular}{@ {}c@ {}}+
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  \\[5mm]+
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  \huge PEP Scala (1) +
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  \end{tabular}}+
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  \normalsize+
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  \begin{center}+
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  \begin{tabular}{ll}+
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  Email:  & christian.urban at kcl.ac.uk\\+
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  Office: & S1.27 (1st floor Strand Building)\\+
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  Slides \& Code: & KEATS+
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  \end{tabular}+
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  \end{center}+
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\end{frame}+
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%     +
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\begin{frame}[c]+
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\frametitle{Why Scala?}+
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\begin{textblock}{6}(3,4)+
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\begin{tabular}{l}+
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\mbox{}\hspace{-1mm}\includegraphics[scale=0.36]{../pics/twitter.png}\\[-1mm]+
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\includegraphics[scale=0.30]{../pics/linked.png}\\+
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\includegraphics[scale=0.30]{../pics/guardian.jpg}\\[-3mm]+
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\mbox{}\hspace{-2mm}\includegraphics[scale=0.38]{../pics/morgan.png}\\[-3mm]+
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\includegraphics[scale=0.30]{../pics/suisse.png}\\+
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{\large\bf ...}+
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\end{tabular}+
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\end{textblock}+
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\begin{textblock}{6}(9,4)+
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\begin{tabular}{l}+
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\includegraphics[scale=0.20]{../pics/edf.png}\\[-1mm]+
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\includegraphics[scale=0.08]{../pics/novell.png}\\[-1mm]+
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\includegraphics[scale=0.30]{../pics/foursquare.png}\\+
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\includegraphics[scale=0.30]{../pics/hsbc.png}\\+
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{\large\bf ...}+
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\end{frame}+
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%     +
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\begin{frame}[c]+
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\frametitle{Why Scala?}+
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+
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\begin{itemize}+
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\item compiles to the JVM\\+
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  \textcolor{gray}{(also JavaScript, native X86 in the works)}\medskip+
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\item integrates seamlessly with Java\medskip+
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\item combines \underline{\bf functional} and {\bf object-oriented} programming\bigskip+
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\item it is a bit on the ``mathematical'' side\\+
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  \textcolor{gray}{(no pointers, no \texttt{null})}+
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  +
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\item often one can write very concise and elegant code+
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\end{itemize}\bigskip\medskip  +
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\small+
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alternatives: Elm, Haskell, Ocaml, ML, Lisp (Racket), \ldots+
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\end{frame}+
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\begin{frame}[c]+
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\frametitle{Java vs Scala}+
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{\lstset{language=java}\fontsize{12}{12}\selectfont+
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\texttt{\lstinputlisting{Point.java}}}+
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\rule{11cm}{0.3mm}\\[-2mm]+
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{\lstset{language=scala}\fontsize{12}{12}\selectfont+
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\texttt{\lstinputlisting{Point.scala}}}+
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\begin{textblock}{6}(13,3)+
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\textbf{\large Java}+
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\end{textblock}+
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\begin{textblock}{6}(13,13.4)+
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\textbf{\large Scala}+
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\end{textblock}  +
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\end{frame}+
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%   +
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\begin{frame}[c]+
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\frametitle{Scala Tools}+
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\begin{itemize}+
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\item there is a plugin for Eclipse (called Scala IDE)\medskip+
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\item there is also a plugin for IntelliJ\bigskip+
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\item I use the venerable Emacs ;o)+
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\end{itemize}  +
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\end{frame}+
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\begin{frame}[c]+
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\frametitle{Types}+
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\begin{itemize}+
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\item Base types\smallskip+
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  \begin{tabular}{@{}l@{}}+
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    \textcolor{codegreen}{\texttt{Int}},+
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    \textcolor{codegreen}{\texttt{Long}},+
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    \textcolor{codegreen}{\texttt{BigInt}},+
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    \textcolor{codegreen}{\texttt{Float}},+
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    \textcolor{codegreen}{\texttt{Double}}\\+
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    \textcolor{codegreen}{\texttt{String}},+
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    \textcolor{codegreen}{\texttt{Char}}\\+
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    \textcolor{codegreen}{\texttt{Boolean}}+
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  \end{tabular}+
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\item Compound types \smallskip   +
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  \begin{tabular}{@{}ll@{}}+
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    \textcolor{codegreen}{\texttt{List[Int]}}     & lists of Int's \\+
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    \textcolor{codegreen}{\texttt{Set[Double]}}   & sets of Double's \\+
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    \textcolor{codegreen}{\texttt{(Int, String)}} & Int-String pair\\+
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    \textcolor{codegreen}{\texttt{List[(BigInt, String)]}} &+
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                                      lists of BigInt-String\\+
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                                      & pairs\\+
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    \textcolor{codegreen}{\texttt{List[List[Int]]}} & list of lists of Int's\\                                  +
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  \end{tabular}+
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\end{itemize}  +
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\end{frame}+
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%   +
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\begin{frame}[c]+
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\frametitle{An Http Request}+
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\begin{textblock}{1}(2,5)+
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\begin{tabular}{c}+
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\includegraphics[scale=0.15]{../pics/servers.png}\\[-2mm]+
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\small Server+
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  \draw[red, <-, line width = 2mm] (X) -- (Y);+
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  \node [inner sep=5pt,label=above:\textcolor{black}{GET request}] at ($ (X)!.5!(Y) $) {};+
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  \node [inner sep=7pt,label=above:\textcolor{black}{POST data}] at ($ (X2)!.5!(Y2) $) {};+
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\begin{textblock}{1}(9,5.5)+
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\begin{tabular}{c}+
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\includegraphics[scale=0.15]{../pics/laptop.png}\\[-2mm]+
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\small Browser+
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\begin{frame}[c]+
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{\lstset{language=Java}\fontsize{7}{8}\selectfont+
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\texttt{\lstinputlisting{URLReader.java}}}+
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\only<2>{+
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\includegraphics[scale=0.50]{../pics/skeleton.jpg}\\+
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\begin{frame}[c]+
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\frametitle{Conclusion}+
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\begin{itemize}+
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\item Scala is still under heavy development\\ (the compiler is terribly slow)\medskip+
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\item {\bf\url{http://www.scala-lang.org/}}\bigskip+
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\item it is a rather \textbf{\alert{deep}} language\ldots i.e.~gives you a lot of+
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  rope to shoot yourself\bigskip\bigskip +
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\item hope you have fun with the coursework  +
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\end{itemize}+
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\end{frame}+
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\begin{frame}[c]+
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\frametitle{\begin{tabular}{c}\\[3cm]\alert{Questions?}\end{tabular}}+
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\mbox{}+
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\end{document}+
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