scala not enough arguments for method map

They are library abstractions that you can extend and adapt. Scala gives you this fine-grained control if you need it, because maps in Scala are not language syntax. However, sometimes you might not agree with their “one size fits all” philosophy, because you need to control the properties of the maps you use in your program in a more fine-grained way. One common characteristic of these languages, which is relevant for the example above, is that they each support an “associative map” construct in the syntax of the language.Īssociative maps are very useful because they help keep programs legible and concise. Indeed, the feel is that of a modern “scripting” language like Perl, Python or Ruby. The notation in this example is high-level, to the point, and not cluttered with extraneous semicolons or type annotations. ('Japan' -> 'Tokyo'), and prints the capital associated with the country France. This program sets up a map from countries to their capitals, modifies the map by adding a new binding Var capital = Map('US' -> 'Washington', 'France' -> 'Paris') Consider, for example, the following small Scala program: Programs of different sizes tend to require different programming constructs. If you’re anxious to start writing some Scala code, you should jump ahead to Chapter 2, “First Steps in Scala.” A language that grows on you Although this book is a Scala tutorial, this chapter isn’t really part of the tutorial. After reading the chapter you should have a basic feel for what Scala is and what kinds of tasks it might help you accomplish.

This initial chapter answers the question, “Why Scala?” It gives a high-level view of Scala’s design and the reasoning behind it. Because it is so malleable, programming in Scala can be a lot of fun. It also leads to a legible and concise programming style. The combination of both styles in Scala makes it possible to express new kinds of programming patterns and component abstractions. Its object-oriented constructs make it easy to structure larger systems and to adapt them to new demands. Scala’s functional programming constructs make it easy to build interesting things quickly from simple parts. The two programming styles have complementary strengths when it comes to scalability. The fusion of object-oriented and functional programming shows up in many different aspects of Scala it is probably more pervasive than in any other widely used language. Technically, Scala is a blend of object-oriented and functional programming concepts in a statically typed language. But it can play out its strengths even more for building large systems and frameworks of reusable components. It’s a great language for writing scripts that pull together Java components. It runs on the standard Java platform and it interoperates seamlessly with all Java libraries. You can apply Scala to a wide range of programming tasks, from writing small scripts to building large systems. The name Scala stands for “scalable language.” The language is so named because it was designed to grow with the demands of its users. Programming in Scala, you'll get an overview of the Scala language and insights into its design. In this article, which is based on Chapter 1 of the book,

Scala not enough arguments for method map