Download A Beginner's Guide to Scala, Object Orientation and by John Hunt PDF

By John Hunt

Scala is a brand new programming language built via Martin Odersky and his workforce on the EPFL. The identify Scala is derived from Sca(lable) La(nguage). Scala is a multi-paradigm language, incorporating item orientated methods with useful programming. even though a few familiarity with general computing strategies is thought (such because the suggestion of compiling a application and executing this compiled shape, etc.) and with simple procedural language strategies (such as variables and allocation of values to variables) the early chapters of the publication don't suppose any familiarity with item orientation nor practical programming. those chapters additionally step via different ideas with which the reader will not be ordinary (such as record processing). From this historical past, John Hunt offers a pragmatic advent to item and sensible expertise utilizing Scala, one of many most recent and best programming languages to be had. numerous innovations are brought via functional event taking the reader past the extent of the language syntax to the philosophy and perform of object-oriented improvement and practical programming. scholars, and people actively excited about the software program will locate this complete creation to Scala and to item orientation and useful programming, invaluable.

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

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1 Selecting a Workspace Eclipse is oriented around the idea of a workspace containing one or more projects. The workspace is associated with a directory location and typically projects reside under that workspace location. Personally I create a directory called workspaces, in which I place a workspace for a particular task or tool and inside this I have projects. 4. In the above I have created a directory workspaces containing two sub directories. The projects will all be created in scala210-pracs.

One of the most important features of inheritance (ironically) is that it allows the developer to get inside the encapsulation bubble in limited and controlled ways. This allows the subclass to take advantage of internal data structures and methods, without compromising the encapsulation a forded to objects. For example, let use define a subclass of the class Date (extends is used to indicate inheritance in Scala): class Birthday extends Date { val name: String = “ ” val age: Int = 0 def isBirthday(): Boolean = The method isBirthday() could check to see if the current date, matched the birthday represented by an instance of Birthday and return true if it does and false if it does not.

However, this is something we must bear in mind later. 26 4 Constructing an Object Oriented System Component Component (aPump) (aFuse) (aRelay) (aMotor) a Pump Fuse Relay Motor (aPump) (aFuse) (aRelay) (aMotor) b Fig. 7 Bringing It All Together So far we have identified the primary objects in our system and the basic set of services they should present. These services were based solely on the data the objects hold. We must now consider how to make our system function. To do this, we need to consider how it might be used.

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