Scala Language Specification
Table of Contents Lexical Syntax Identifiers, Names & Scopes Types Basic Declarations & Definitions Classes & Objects Expressions Implicits Pattern Matching Top-Level Definitions XML Annotations Standard Library Syntax Summary References Changelog Authors and Contributors Martin Odersky, Philippe Altherr, Vincent Cremet, Gilles Dubochet, Burak Emir, Philipp Haller, Stéphane Micheloud, Nikolay Miha
The Scala Programming Language
val fruits = List("apple", "banana", "avocado", "papaya") val countsToFruits = // count how many 'a' in each fruit fruits.groupBy(fruit => fruit.count(_ == 'a')) for (count, fruits) <- countsToFruits do println(s"with 'a' × $count = $fruits") // prints: with 'a' × 1 = List(apple) // prints: with 'a' × 2 = List(avocado) // prints: with 'a' × 3 = List(banana, papaya)
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Scala Improvement Documents Library | The Scala Programming Language
http://www.scala-lang.org/downloads/changes.html