Install Scala on MAC OS X ( LION )

Hello there, in this post I will share how to install Scala on your Mac Lion. First thing you need to do is download the latest Scala compiler. Click here and download the .tgz compiler package. I recommend downloading the.tgz file rather than .jar.

When the download completed, unpack and move it to your user home folder. For example, "/Users/your_user/". Once you moved it to the user's home folder, now create or modify your ".profile" files in your home folder. Open the Terminal and use Vim or Nano to add the line below to the end of file.

export PATH="/Users/your_user/scala/bin:$PATH"

Save and close the modified file. Now apply the changes using this command.

source .profile

Close the Terminal and reopen it to check the result. To verify whether the Scala working well, in the Terminal type in “Scala” and you should see the output like the quote below.
 

iMac-my:~ ogonbat$ scala
Welcome to Scala version 2.9.1.final (Java HotSpot(TM) 64-Bit Server VM, Java 1.6.0_26).
Type in expressions to have them evaluated.
Type :help for more information.

scala>

Via cingusoft.posterous.  

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How to install Scala on Debian/Ubuntu (Scala 2.9.0.1, 2.8.1)

Update: Scala 2.9.0.1 (hotfixes to 2.9.0, released on May 12) was released on May 25, 2011. In this tip you can find a way how to install it (and older version - 2.8.1) onto yours Ubuntu/Debian box.

Ubuntu default apt repository gives us option to install only scala-2.7.7, but if you want to use latest version of scala (2.9.0.1 2.8.1 to date when this tip was written), so all what we need to do is this actions:

$ wget http://www.scala-lang.org/downloads/distrib/files/scala-2.9.0.1.tgz
$ tar zxf scala-2.9.0.1.tgz
$ sudo mv scala-2.9.0.1 /usr/share/scala

But if you need to install older (2.8.1) version of scala you need to run next commands:

$ wget http://www.scala-lang.org/downloads/distrib/files/scala-2.8.1.final.tgz
$ tar zxf scala-2.8.1.final.tgz
$ sudo mv scala-2.8.1.final /usr/share/scala

Ok, now you we need to make a few links to scala binary, scalac (scala compiler), fsc (fast scala compiler) and others scala executables:

$ sudo ln -s /usr/share/scala/bin/scala /usr/bin/scala
$ sudo ln -s /usr/share/scala/bin/scalac /usr/bin/scalac
$ sudo ln -s /usr/share/scala/bin/fsc /usr/bin/fsc
$ sudo ln -s /usr/share/scala/bin/sbaz /usr/bin/sbaz
$ sudo ln -s /usr/share/scala/bin/sbaz-setup /usr/bin/sbaz-setup
$ sudo ln -s /usr/share/scala/bin/scaladoc /usr/bin/scaladoc
$ sudo ln -s /usr/share/scala/bin/scalap /usr/bin/scalap

And how to uninstall (for both versions of scala):

$ sudo rm -rf /usr/share/scala /usr/bin/scala /usr/bin/scalac /usr/bin/fsc /usr/bin/sbaz /usr/bin/sbaz-setup /usr/bin/scaladoc /usr/bin/scalap

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Scala Examples - Advanced

Source	Description
addressbook.scala	Address book to XHTML code (see also XML Processing)
callccInterpreter.scala	Interpreter with continuations using monads
fors.scala	for comprehensions (see also Sequence Comprehensions)
gadts.scala	Generalised algebraic data types
lazyEvaluation.scala	Lazy evaluation
message.scala	Actors (see also Actors for Scala)
patterns.scala	Pattern matching using case classes (see also Case Classes)
extractorPatterns.scala	Pattern matching using extractors - a flexible way of matching objects with patterns
pingpong.scala	Actors (see also Actors for Scala)
properties.scala	Properties
random.scala	Client/server application using Java sockets
simpleInterpreter.scala	Simple interpreter using monads
sort.scala	Recursive quicksort algorithm (imperative solution, see also Nested Functions)
sort1.scala	Recursive quicksort algorithm (functional solution)
timeofday.scala	Properties (see example 1 in § 4.2 of the Scala Language Specification)
vectors.scala	Vector operations using views (see also Views)
brainf_ck.scala	A small Brainf*ck interpreter

To compile and run on Windows one of the above Scala programs, let's say sort.scala, we can simply proceed as follows:

> mkdir classes
> scalac -d classes %SCALA_HOME%\doc\scala-devel\scala\examples\sort.scala
> scala -cp classes examples.sort
[6,2,8,5,1]
[1,2,5,6,8]

The name of the Scala executable is examples.sort where examples is the name of the package containing the sortobject. Running the test on a Unix system is very much similar, except for the use of slashes instead of backslashes, and a different specification of the Scala home directory.

Other Scala examples

Finally, the following ressources contain Scala examples as well:

• The Scala distribution contains a directory examples with other source examples.
• The document Scala By Example (about 150 pages, available in PDF format) contains more advanced Scala examples.
• The Scala Wiki contains many other code examples.

scala-lang.org

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