Update free-programming-books-pl.md

Added Polish Scala book.
9 years ago · 1cd6fd4046
parent 60a596d20f
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 * [Prolog](#prolog)
 * [Python](#python)
 * [Ruby](#ruby)
+* [Scala](#scala)
 * [SQL](#sql)


@ -84,6 +85,8 @@
 ### Ruby
 * [Ruby](http://pl.wikibooks.org/wiki/Ruby)

+### Scala
+* [Język programowania Scala](http://www.grzegorzbalcerek.net/jps2/index.html)

 ### SQL
 * [SQL i PL/SQL – podstawy](http://jsystems.pl/storage/sqlplsql1.pdf)