pep-material: comparison handouts/pep-ho.tex

equal deleted inserted replaced

-:f70d74fea67f
+:2a30c7dfe3ed
 \end{quote}
 \noindent\alert
 For PEP, make sure you are using the version 3(!) of Scala. This is
 the version I am going to use in the lectures and in the coursework. This
-can be any version of Scala 3.X where $X=\{3,4\}$. Also the minor
+can be any version of Scala 3.X where $X=\{4,5\}$. Also the minor
 number does not matter. Note that this will be the second year I am
 using this newer version of Scala -- some hiccups can still happen. Apologies
 in advance!\bigskip
-\begin{tcolorbox}[colback=red!5!white,colframe=red!75!black]
+%\begin{tcolorbox}[colback=red!5!white,colframe=red!75!black]
-I will be using the \textbf{\texttt{scala-cli}} REPL for Scala 3, rather
+%  I will be using the \textbf{\texttt{scala-cli}} REPL for Scala 3, rather
-than the ``plain'' Scala REPL. This is a batteries included version of
+%  than the ``plain'' Scala REPL. This is a batteries included version of
-Scala 3 and is easier to use and to install. In fact
+%  Scala 3 and is easier to use and to install. In fact
-\texttt{scala-cli} is designated to replace
+%  \texttt{scala-cli} is designated to replace
-the ``plain'' Scala REPL in future versions of Scala.
+%  the ``plain'' Scala REPL in future versions of Scala.
-So why not using it now?
+%  So why not using it now?
-It can be downloaded from:
+%  It can be downloaded from:%
+%
-\begin{center}
+%  \begin{center}
-\url{https://scala-cli.virtuslab.org}
+% \url{https://scala-cli.virtuslab.org}
-\end{center}
+%  \end{center}
-\end{tcolorbox}\medskip
+%\end{tcolorbox}\medskip
 \noindent
 If you are interested, there are also experimental backends for Scala
 for generating JavaScript code (\url{https://www.scala-js.org}), and
 \caption{My installation of VS Code / Codium includes the
 package  \textbf{Scala Syntax (official)} 0.5.7 from Marketplace.
 I have also bound the keys \keys{Ctrl} \keys{Ret} to the
 action ``Run-Selected-Text-In-Active-Terminal'' in order to quickly
 evaluate small code snippets in the Scala REPL. I use Codium's internal
-terminal to run \texttt{scala-cli} version 1.0.5 which
+terminal to run \texttt{scala} version 1.0.5 which
 uses Scala 3.3.1.\label{vscode}}
 \end{boxedminipage}
 \end{figure}
 Actually \alert last year I switched to VS Codium as IDE for writing Scala programs. VS Codium is VS Code
 \end{quote}
 \noindent
 But you should be careful if you use them for your coursework: they
 are meant to play around, not really for serious work. Therefore make
-sure \texttt{scala-cli} works on your own machine ASAP!
+sure \texttt{scala} works on your own machine ASAP!
 As one might expect, Scala can be used with the heavy-duty IDEs
 Eclipse and IntelliJ. For example IntelliJ includes plugins for
 Scala
 \noindent
 Relevant xkcd entries about functional programming are XXX.
 \subsection*{The Very Basics}
-Let us get back to Scala and \texttt{scala-cli}: One advantage of
+Let us get back to Scala: One advantage of
 Scala over Java is that it includes an interpreter (a REPL, or
 \underline{R}ead-\underline{E}val-\underline{P}rint-\underline{L}oop)
 with which you can run and test small code snippets without the need
 of a compiler. This helps a lot with interactively developing
 programs. It is my preferred way of writing small Scala programs. Once
-you installed \texttt{scala-cli}, you can start the interpreter by typing on the
+you installed \texttt{scala}, you can start the interpreter by typing on the
 command line:
 \begin{lstlisting}[language={},numbers=none,basicstyle=\ttfamily\small]
-$ scala-cli
+$ scala
-Welcome to Scala 3.4.1 (21.0.2, Java OpenJDK 64-Bit Server VM).
+Welcome to Scala 3.5.1 (21.0.4, Java OpenJDK 64-Bit Server VM).
 Type in expressions for evaluation. Or try :help.
 scala>
 \end{lstlisting}%$
 \noindent The precise response may vary depending on the version and
-platform where you installed \texttt{scala-cli}. Make sure however that
+platform where you installed \texttt{scala}. Make sure however that
-\texttt{scala-cli} uses Scala version 3---you can find the version
+\texttt{scala} uses version 3---you can find the version
 number in the welcome message. Also note that at the first time
-\texttt{scala-cli} runs, it might download various components, for
+\texttt{scala} runs, it might download various components, for
 example the Scala compiler, Scala runtimes etc. Once
-\texttt{scala-cli} is up and running, you can type at the prompt
+\texttt{scala} is up and running, you can type at the prompt
 expressions like \code{2 + 3}\;\keys{Ret} and the output will be
 \begin{lstlisting}[numbers=none,language={}]
 scala> 2 + 3
 val res0: Int = 5
 function that causes a side-effect, like \code{println}. We
 shall come back to this point later, but if you are curious
 now, the latter kind of functions always has \code{Unit} as
 return type. It is just not printed by Scala.
-You can try more examples with the \texttt{scala-cli} REPL, but feel free to
+You can try more examples with the \texttt{scala} REPL, but feel free to
 first guess what the result is (not all answers by Scala are obvious):
 \begin{lstlisting}[numbers=none,language={}]
 scala> 2 + 2
 scala> 1 / 2
 %object Hello extends App {
 %    println("hello world")
 %}
 \noindent save it in a file, say {\tt hello-world.scala}, and
-then use \texttt{scala-cli} (which compiles the
+then use \texttt{scala} (which compiles the
 scala file and runs it):
 \begin{lstlisting}[language={},numbers=none,basicstyle=\ttfamily\small]
-$ scala-cli hello-world.scala
+$ scala hello-world.scala
 hello world
 \end{lstlisting}
 \noindent
 Like Java, Scala targets the JVM and consequently
 Scala programs can also be executed by the bog-standard Java
 Runtime. This can be done as follows:
 \begin{lstlisting}[language={},numbers=none,basicstyle=\ttfamily\small]
-$ scala-cli --power package --assembly hello-world.scala
+$ scala --power package --assembly hello-world.scala
 $ java -jar Hello.jar
 hello world
 \end{lstlisting}

changeset 491	2a30c7dfe3ed
parent 489	6ee9ad5d766f