By John Hunt
Scala is a brand new programming language built 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 ways with practical programming. even supposing a few familiarity with general computing strategies is thought (such because the thought 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 booklet don't suppose any familiarity with item orientation nor sensible programming. those chapters additionally step via different techniques with which the reader will not be prevalent (such as checklist processing). From this historical past, John Hunt presents a realistic creation to item and useful know-how utilizing Scala, one of many most up-to-date and finest programming languages on hand. a number of strategies 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 practical programming. scholars, and people actively considering the software program will locate this entire advent to Scala and to item orientation and useful programming, invaluable.
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Additional info for A Beginner's Guide to Scala, Object Orientation and Functional Programming
1 Introduction The pervious chapter introduced the basic concepts behind object orientation, the terminology and explored some of the motivation. This chapter looks at how object orientation addresses some of the issues that have been raised with procedural languages. To do this it looks at how a small extract of a program might be written in a language such as C, considers the problems faced by the C developer and then looks at how the same functionality might be achieved in an object oriented language such as Scala, Java or C#.
Functional Programming promotes declarative programming (and is in fact a subtype of declarative programming), which means that programming is oriented around expressions that describe the solution rather than focus on the imperative approach of most procedural programming languages. These languages emphasise aspects of how the solution is derived. foreach(print) Functional Programming has its roots in the lambda calculus, originally developed in the 1930s, to explore computability. Many Functional Programming languages can thus be considered as elaborations on this lambda calculus.
For example, code could set the day to 01, the month to 13 and the year to 9999. As far as the structure is concerned the information it holds is fine (that is day = 01, month = 13, year = 9999). This is because the structure only knows it is supposed to hold an integer, it knows nothing about dates per se. This is not surprising, it is only data. 2 Procedures for the Data Structure This data is associated with procedures that perform operations on it. These operations might be to test whether the date represents a date at a weekend or part of the working week.