Download Making use of Ruby by Suresh Mahadevan PDF

By Suresh Mahadevan

ISBN-10: 047121972X

ISBN-13: 9780471219729

Ruby is an interpreted language, able to saving programmers enormous time in the course of software improvement considering that no compilation and linking are useful. it's perfect for writing text-processing functions, server-side scripts, program prototypes, arithmetic, and for plenty of daily programming tasks.* studies Ruby's shrewdpermanent syntax and demonstrates why that makes it an ideal selection for starting programmers, and in addition indicates how its multipurpose features make it a legitimate selection for skilled builders* Explores Ruby's makes use of for prototyping, textual content processing, and different projects

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To display the text Goodbye Anya and Thanks for Purchasing Online, you can write: puts text1 puts text2 Verify the Output Verify that all the values are displayed correctly and are in the proper format. 1 shows the output. Arrays, Hashes, and Ranges Arrays When you declare a variable, you reserve a memory location. However, for situations in which you need to store a large amount of related data, you use arrays. 1 The screen output.

For example, an airplane has three wheels, horsepower of 1,000, fuel as the type of tank, and a capacity of 100 liters. In the same way, a car has four wheels, horsepower of 200, gas as the type of tank, and a capacity of 25 litres. Therefore, you can say that airplane and car are objects of the class Vehicle. In this way, you can instantiate several objects of a class. 15 16 Chapter 2 Because an object-oriented programming language is very much like the real world, it also supports features such as data encapsulation, data abstraction, polymorphism, and inheritance.

Ruby — A Pure Object-Oriented Language Summary In this chapter, you learned: ■■ The need for object orientation. ■■ You were introduced to classes and objects. ■■ You learned that the features of object orientation are data encapsulation, data abstraction, inheritance, and polymorphism. ■■ The different types of variables are local, global, class, and instance. ■■ You can create an object by using the new method. ■■ You can also create an object by using the new method with parameters. ■■ Finally, you learned about access control in Ruby by using private, protected, and public.

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