http://www.offshore-website-development.com/claveland Offshore Website Development Tue, 04 Mar 2008 13:59:32 +0000 http://backend.userland.com/rss092 en RELATIONSHIP BETWEEN CLASSES AND OBJECTS Classes and objects are separate yet intimate related concepts.Specifically , every object is the instance of some class ,and every class has zero or more instance .For particularly all applications classes are static : therefore their existence ,semantics ,and relationship are fixed prior to the ... http://www.offshore-website-development.com/claveland/2008/03/04/the-interplay-of-classes-and-objects/ Consider for a moment the similarities and differences among the following classes of objects: flowers, daises, red roses, yellow roses, petals, and lady bugs.We can make the following observations: A daisy is a kind of flower. A rose is a different kind of flower. Red roses and yellow roses are both kinds of ... http://www.offshore-website-development.com/claveland/2008/03/04/relationship-among-classes/ WHAT IS AND WHAT ISN’T A CLASS The concept of a class and an objects are tightly interowens,for we cannot talk about an object without regard for its class .However there are important difference between these two terms. Where as an objects is a concrete entity that exists in time ... http://www.offshore-website-development.com/claveland/2008/03/04/the-nature-of-a-class/ An object by itself is intensely uninteresting .Objects contributes to the behavior of a system by collaborating with one another .Instead of a bit grinding processor raping and plundering data structure ,we have a universe of well-behaved objects that courteously ask each other to carry out their various desires.For ... http://www.offshore-website-development.com/claveland/2008/03/04/relationship-among-objects/ Definition: Identity is that property of an object which distinguishes it from all other objects. Most programming languages use variable names to distinguish temporary objects, mixing addressability and identity. Most database system use identifier keys to distinguish persistent objects mixing data value and identity. the failure to recognize the difference between ... http://www.offshore-website-development.com/claveland/2008/03/04/identity-of-an-object/ No object exists in isolation. Rather, objects are acted upon, and themselves act upon other objects. Thus we may say that Definition: Behavior is how an object acts and reacts, in terms of its state changes and message passing. In another words, the behavior of an objects represents its outwardly visible and ... http://www.offshore-website-development.com/claveland/2008/03/04/behavior-of-an-object/ Considering the vending machine that dispenses softy drinks. The usual behavior of such objects is that when one puts coins in a slot and pushes a button to make a selection a drink emerges from a machine. What happens if the user first makes a selection a drink emerges from ... http://www.offshore-website-development.com/claveland/2008/03/04/state-of-an-object/ WHAT IS AND WHAT ISN’T AN OBJECT The ability to recognize physical objects is a skill that humans learn at a very early age. A brightly colored ball will attract an infant’s attention. But typically if you hide the ball, the child will not try to look for it ; when ... http://www.offshore-website-development.com/claveland/2008/03/04/the-nature-of-an-object/ Engineering as a science and an art The practice of every engineering discipline involves elements of both science and art. As Petroski states, the conception of a design of a new structure can involve as much a leap of imagination and as much as a synthesis of experienced and knowledge as ... http://www.offshore-website-development.com/claveland/2008/02/29/on-designing-complex-systems/ The Role of Decomposition The technique of mastering complexity has been known since ancient times: divide and rule. When designing a complex software systems, it is essential to decompose it into smaller parts each of which we may then refine independently. In this manner, we satisfy the very real constraint that ... http://www.offshore-website-development.com/claveland/2008/02/29/bringing-order-to-chaos/