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%Information to be included in the title page:
\title{Parentheses Vs. Square Brackets}
\subtitle{}
\author{Damien Cassou, Stéphane Ducasse and Luc Fabresse}
\institute{http://stephane.ducasse.free.fr}
\date{}
\slidesid{W2S09}

\begin{document}

\frame[plain]{\titlepage}



\begin{frame}[fragile]

\frametitle{ ( ) vs. [ ]}

\begin{itemize}
\item \code{( )} just changes the priority of an execution but the program is executed
\item \code{{[} {]}} blocks program execution: the program is NOT executed
\end{itemize}
\end{frame}



\begin{frame}[fragile]

\frametitle{ Use [ ] for 'Unknown' Execution Occurrence}

Use \code{{[} expressions {]}} when:

\begin{itemize}
\item \code{expressions} may not be executed at all (if, and, ...)
\item \code{expressions} may be executed multiple times (while, ...)
\end{itemize}
\end{frame}



\begin{frame}[fragile]

\frametitle{Example}

\begin{listing}{}
n timesRepeat: [ self doSomething ]
\end{listing}

\code{timesRepeat:} executes a number of times its argument, therefore the argument is a block
\end{frame}



\begin{frame}[fragile]

\frametitle{ ( ) vs. [ ] Example}

\begin{listing}{}
x isNil ifTrue: [ self doSomething ]
\end{listing}

\code{ifTrue:} may execute or not its argument, therefore the argument is a block
\end{frame}



\begin{frame}[fragile]

\frametitle{ ( ) vs. [ ] Example}

\begin{listing}{}
[ self start ] whileTrue: [ self doSomething ]
\end{listing}

\code{whileTrue:} may execute both its receiver and argument multiple times, therefore they are both a block
\end{frame}



\begin{frame}[fragile]

\frametitle{Quiz}

\begin{listing}{}
1 to: n do: ... self doSomething ...
\end{listing}

\begin{listing}{}
x ifEmpty: ... self doSomething ...
\end{listing}
\end{frame}



\begin{frame}[fragile]

\label{squareBracketQuiz}
\frametitle{Quiz}

\begin{listing}{}
1 to: 100 do: [ :i | self doSomething ]
\end{listing}

\begin{listing}{}
x ifEmpty: [ self doSomething ]
\end{listing}
\end{frame}



\begin{frame}[fragile]

\label{squareBracketQuiz}
\frametitle{Summary}

\begin{itemize}
\item \code{( ) } is about changing the order of a computation
\item \code{{[} {]}} is freezing the computation and controlling it
\end{itemize}
\end{frame}




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\centering
\large


\vspace{2em}

A course by

\vspace{1em}

\hspace{-20px}\includegraphics[height=32px]{inriaLogo}\hspace{3em}\raisebox{7px}{and}\hspace{3em}\raisebox{-6px}{\includegraphics[height=30px]{logoutop}}

\vspace{2em}

in collaboration with

\vspace{1em}

\includegraphics[height=40px]{unisciellogo}\hskip 1.5em%
\raisebox{5px}{\includegraphics[height=30px]{unitlogo}}\hskip 2em%
\raisebox{8px}{\includegraphics[height=24px]{univLilleLogo}}\hskip 2em%
\raisebox{3px}{\includegraphics[height=29px]{logo-IMT}}\hskip 2em%
\raisebox{1px}{\includegraphics[height=32px]{minesDouaiLogo}}

\vspace{2.5em}

\includegraphics[width=50px]{by-nc-nd} \tiny \hskip 0.5em \raisebox{5px}{Inria 2016}

\medskip

\tiny
Except where otherwise noted, this work is licensed under CC BY-NC-ND 3.0 France

\url{https://creativecommons.org/licenses/by-nc-nd/3.0/fr/} 

\end{minipage}
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\end{document}

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