49 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%     

    50 \begin{frame}[t,fragile]

    51   \frametitle{Mea Culpa}

    52 \bigskip

    53   

    54 \mbox{\hspace{-4mm}}CW6, Part 3 (deadline 21 December)\bigskip\medskip  

    55 \small

    56 \begin{lstlisting}[language=Scala, numbers=none, xleftmargin=-4mm]

    57 val blchip_portfolio =

    58  List("GOOG", "AAPL", "MSFT", "IBM", "FB",

    59                           "YHOO", "AMZN", "BIDU")

    60 

    61 val rstate_portfolio =

    62 List("PLD", "PSA", "AMT", "AIV", "AVB",

    63                           "BXP", "CBG", "CCI", 

    64      "DLR", "EQIX", "EQR", "ESS", "EXR",

    65                           "FRT", "GGP", "HCP") 

    66 \end{lstlisting}\bigskip

    67                         

    68 \onslide<2>{The results in the CW are calculated with YHOO and CBG deleted.}

    69 

    70 \only<2>{

    71 \begin{textblock}{6}(8.5,6.6)

    72   \begin{tikzpicture}

    73     \node (B0) at (0,0) {};

    74     \node (B1) at (0,0.5) {};

    75     \node (B2) at (1.2,0) {};

    76     \node (B3) at (1.2,0.5) {};

    77     \draw [red,line width=1mm] (B0) -- (B3);

    78     \draw [red,line width=1mm] (B1) -- (B2);

    79   \end{tikzpicture}

    80 \end{textblock}}

    81 

    82 \only<2>{

    83 \begin{textblock}{6}(10.5,9.9)

    84   \begin{tikzpicture}

    85     \node (B0) at (0,0) {};

    86     \node (B1) at (0,0.5) {};

    87     \node (B2) at (1.2,0) {};

    88     \node (B3) at (1.2,0.5) {};

    89     \draw [red,line width=1mm] (B0) -- (B3);

    90     \draw [red,line width=1mm] (B1) -- (B2);

    91   \end{tikzpicture}

    92 \end{textblock}}

    93 \end{frame}

    94 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

    95 

    96 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%     

    97 \begin{frame}[c]

    98 \frametitle{Mea Culpa 2}

    99 

   100 Avoid at all costs, even in comments

   101 

   102 \begin{itemize}

   103 \item \texttt{var} \only<2>{$\quad\Rightarrow\;$\texttt{Var}}

   104 \item \texttt{return} \only<2>{$\quad\Rightarrow\;$\texttt{Return}}

   105 \item \texttt{.par}

   106 \item \texttt{ListBuffer}

   107 \item \texttt{mutable}  

   108 \end{itemize}

   109 

   110 \end{frame}

   111 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

   112 

   113 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%     

   114 \begin{frame}[t]

   115 \frametitle{For-Comprehensions Again}

   116 

   117 \begin{center}

   118   \begin{tikzpicture}[scale=1,

   119                       node/.style={

   120                       rectangle,rounded corners=3mm,

   121                       very thick,draw=black!50,

   122                       minimum height=18mm, minimum width=20mm,

   123                       top color=white,bottom color=black!20}]

   124 

   125   \node (A0) at (0.1,0) {\texttt{\textcolor{purple}{\textbf{for}} (\alert<2->{n} <- List(}};

   126   \node (A1) at (2.3,0) {\texttt{\phantom{,}1,}};

   127   \node (A2) at (3.2,0) {\texttt{\phantom{,}2,}};

   128   \node (A3) at (4.1,0) {\texttt{\phantom{,}3,}};

   129   \node (A4) at (5.0,0) {\texttt{\phantom{,}4,}};

   130   \node (A5) at (5.9,0) {\texttt{\phantom{))}5))}};

   131   \node (A6) at (8,0) {\texttt{\textcolor{purple}{\textbf{yield}} \alert<2->{n\,*\,n}}};

   132 

   133   \onslide<2->{

   134   \node (B0) at (1.4,-3) {\texttt{List(}};

   135   \node (B1) at (2.3,-3) {\texttt{\phantom{,}1,}};

   136   \node (B2) at (3.6,-3) {\texttt{\phantom{,}4,}};

   137   \node (B3) at (4.9,-3) {\texttt{\phantom{,}9,}};

   138   \node (B4) at (6.2,-3) {\texttt{\phantom{,}16,}};

   139   \node (B5) at (7.5,-3) {\texttt{\phantom{,}25)}};}

   140 

   141   \onslide<2->{

   142   \draw [->,line width=1mm] (A1.south) -- (B1.north);

   143   \draw [->,line width=1mm] (A2.south) -- (B2.north);

   144   \draw [->,line width=1mm] (A3.south) -- (B3.north);

   145   \draw [->,line width=1mm] (A4.south) -- (B4.north);

   146   \draw [->,line width=1mm] (A5.south) -- (B5.north);}

   147 

   148   \onslide<2->{

   149   \node (Q1) at (-0.45,-0.1) {};

   150   \node (Q2) at (-0.45,-2.8) {};

   151   \node (Q3) at (-0.45,-2.95) {\alert<2->{\texttt{n\,*\,n:}}};

   152   \draw [->,red,line width=1mm] (Q1.south) -- (Q2.north);}

   153  \end{tikzpicture}

   154 \end{center}

   155 

   156 \onslide<3>{This is for when the for-comprehension\\ \textbf{yields / produces} a result.}

   157 

   158 \end{frame}

   159 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

   160 

   161 

   162 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%     

   163 \begin{frame}[t]

   164 \frametitle{For-Comprehensions Again}

   165 

   166 \begin{center}

   167   \begin{tikzpicture}[scale=1,

   168                       node/.style={

   169                       rectangle,rounded corners=3mm,

   170                       very thick,draw=black!50,

   171                       minimum height=18mm, minimum width=20mm,

   172                       top color=white,bottom color=black!20}]

   173 

   174   \node (A0) at (0,0)

   175     {\texttt{\textcolor{purple}{\textbf{for}} (n <- List(1, 2, 3, 4, 5))

   176              \textcolor{purple}{\textbf{yield}} n\,*\,n}};

   177 

   178   \node (A1) at (0,-1.5) {\LARGE\textbf{vs}};       

   179          

   180   \node (A2) at (0,-3)

   181     {\texttt{\textcolor{purple}{\textbf{for}} (n <- List(1, 2, 3, 4, 5)) println(n)}};

   182  \end{tikzpicture}

   183 \end{center}\bigskip

   184 

   185 

   186 The second version is in case the for \textbf{does not}

   187 produce any result.

   188 

   189 \end{frame}

   190 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

   191 

   192 

   193 

   194 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%