By John Hunt

Scala is a brand new programming language constructed through Martin Odersky and his staff on the EPFL. The identify Scala is derived from Sca(lable) La(nguage). Scala is a multi-paradigm language, incorporating item orientated techniques with sensible programming. even supposing a few familiarity with general computing suggestions is believed (such because the concept of compiling a software and executing this compiled shape, etc.) and with simple procedural language recommendations (such as variables and allocation of values to variables) the early chapters of the e-book don't suppose any familiarity with item orientation nor sensible programming. those chapters additionally step via different options with which the reader is probably not conventional (such as checklist processing). From this history, John Hunt presents a realistic advent to item and sensible know-how utilizing Scala, one of many most up-to-date and finest programming languages to be had. quite a few options are brought via functional adventure taking the reader past the extent of the language syntax to the philosophy and perform of object-oriented improvement and useful programming. scholars, and people actively considering the software program will locate this entire creation to Scala and to item orientation and sensible programming, invaluable.

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Extra info for A Beginner's Guide to Scala, Object Orientation and Functional Programming

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3 Where Do We Start? This is often a very difficult point for those new to object oriented systems. That is, they have read the basics and understand simple diagrams, but do not know where to start. It is the old chestnut, “I understand the example but don’t know how to apply the concepts myself”. This is not unusual and, in the case of object orientation, is probably normal. ” may at first seem somewhat obscure; you should start with the data. Remember that objects are things that exchange messages with each other.

The identification of the data items is considered in greater detail in Part 7. At this point, merely notice that we have not yet mentioned the functionality of the system or how it might fit together, we have only mentioned the significant items. g. g. the condition of the fuse) is an instance variable of the object. This is a very common way of naming objects and their instance variables. We now have the basic objects required for our application. 24 4 Constructing an Object Oriented System Wash wipe switch Wiper motor Relay Pump Fuse Water bottle Fig.

E. 4 The Scala IDE 49 Fig. 9 A new project displayed in the project explorer Fig. 10 Scala Project Setup Fig. 11 Selecting the Scala Object Wizard ­HelloWorld and bring up the right mouse menu). 11. 12. 13. And now click ‘Finish’. 14). 4 Scala IDE and REPL The Scala interpreter is also available within the Scala IDE. However, in this case it also provides access to any Scala type you currently have within the current ­project. This means that you can type in expressiosn involving the types you are developing to test them out interactively.

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