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\begin{document}
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\fnote{\copyright{} Christian Urban, King's College London, 2022}
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\section*{Scala Worksheet 1}
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Please install Scala on your work-machine: You should have
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Scala up and running, and also an IDE that allows you to
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access the Scala REPL. Some instructions are given at
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\begin{center}
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\url{https://www.scala-lang.org/download/2.13.10.html}
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\end{center}
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\subsubsection*{MacOSX}
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\begin{itemize}
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\item[0)] (if needed) \texttt{brew install java} \;\;or\;\; \texttt{brew reinstall java}
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\item[1)] \texttt{brew install scala@2.13}
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\end{itemize}
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\noindent Another method to install Scala on MacOSX
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\begin{itemize}
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\item[1)] \texttt{curl -s "https://get.sdkman.io" | bash}
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\item[2)] \texttt{sdk install scala 2.13.10}
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\end{itemize}
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\subsubsection*{Windows / Linux Ubuntu}
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\begin{itemize}
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\item[0)] (if needed) \texttt{sudo apt-get remove scala-library scala}
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\item[1)] {\fontsize{8.5}{8.5}\selectfont\texttt{sudo wget https://downloads.lightbend.com/scala/2.13.10/scala-2.13.7.deb}}
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\item[2)] \texttt{sudo dpkg -i scala-2.13.10.deb}
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\end{itemize}
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\noindent
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Other Linux distros: \texttt{sudo apt-get scala}\bigskip
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\noindent In the end you should have something running like
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\begin{lstlisting}[language={},numbers=none,basicstyle=\ttfamily\small]
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$ scala
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Welcome to Scala 2.13.10 (OpenJDK 64-Bit Server VM, Java 17.0.1).
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Type in expressions for evaluation. Or try :help.
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scala>
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\end{lstlisting}%$
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\newpage
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\subsection*{Task 1}
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`Play' with the Scala REPL and try out the following querries. Observe
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what Scala responds.
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\begin{lstlisting}[numbers=none]
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scala> 2 + 2
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scala> 1 / 2
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scala> 1.0 / 2
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scala> 1 / 2.0
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scala> 1 / 0
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scala> 1.0 / 0.0
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scala> true == false
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scala> true && false
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scala> 1 > 1.0
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scala> "12345".length
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scala> List(1,2,1).size
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scala> Set(1,2,1).size
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scala> List(1) == List(1)
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scala> Set(1,2,3) == Set(3,2,1)
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scala> Array(1) == Array(1)
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scala> Array(1).sameElements(Array(1))
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\end{lstlisting}
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\subsection*{Task 2 (Vals)}
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scala> val z = 42
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scala> z = z + 1
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scala> val z = 466
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\subsection*{Task 3}
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\begin{lstlisting}[numbers=none]
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scala> println("Hello " ++ "World")
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scala>
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\end{lstlisting}
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\begin{lstlisting}[numbers=none]
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scala> println("Hello " ++ "World")
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scala>
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\end{lstlisting}
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\end{document}
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%%% Local Variables:
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%%% mode: latex
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%%% TeX-master: t
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%%% End:
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