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Object oriented programming is a way of thinking about problems. Smalltalk is one of the purest incarnations of an object-oriented programming language. Using a pedagogical approach, this book covers all aspects of object oriented programming: first through the study of various preexisting Smalltalk classes, their implementation and use; then through a detailed description of an implementation of an interactive Lindenmayer system and through implementation of a series of calculators.

The author addresses such subjects as graphics programming, dependency mechanisms and hierarchical specialization.

This book fills the gap for an in-depth self-study reference, permitting the reader to master all aspects of object-oriented programming through a large set of exercises with highly detailed resources.

• Downloadable software content for practice applications
• Covers all aspects of Smalltalk: theconcepts of primitive objects, classes and instances, static and dynamic inheritance and methods, as well as graphical programming, the dependency mechanisms and the handling of exceptions
• Features in-depth studies of two programming projects and annotated solutions to all exercies and appendices

The documentation is missing or obsolete, and the original developers have departed. Your team has limited understanding of the system, and unit tests are missing for many, if not all, of the components. When you fix a bug in one place, another bug pops up somewhere else in the system. Long rebuild times make any change difficult. All of these are signs of software that is close to the breaking point.

Many systems can be upgraded or simply thrown away if they no longer serve their purpose. Legacy software, however, is crucial for operations and needs to be continually available and upgraded. How can you reduce the complexity of a legacy system sufficiently so that it can continue to be used and adapted at acceptable cost?

Based on the authors' industrial experiences, this book is a guide on how to reverse engineer legacy systems to understand their problems, and then reengineer those systems to meet new demands. Patterns are used to clarify and explain the process of understanding large code bases, hence transforming them to meet new requirements. The key insight is that the right design and organization of your system is not something that can be evident from the initial requirements alone, but rather as a consequence of understanding how these requirements evolve.

* Describes how to reverse engineer a monolithic system to understand how it really works and how to identify potential problems.
* Includes reengineering patterns that tackle well-known reengineering techniques often encountered in object-oriented programming, such as introducing polymorphism, factoring out common behavior, detecting duplicated code, and understanding design.
* Shows how to build a culture of continuous reengineering for achieving flexible and maintainable object-oriented systems.

The gap between who designers and developers imagine their users are, and who those users really are can be the biggest problem with product development. Observing the User Experience will help you bridge that gap to understand what your users want and need from your product, and whether they'll be able to use what you've created.

Filled with real-world experience and a wealth of practical information, this book presents a complete toolbox of techniques to help designers and developers see through the eyes of their users. It provides in-depth coverage of 13 user experience research techniques that will provide a basis for developing better products, whether they're Web, software or mobile based. In addition, it's written with an understanding of how software is developed in the real world, taking tight budgets, short schedules, and existing processes into account.

·Explains how to create usable products that are still original, creative, and unique

·A valuable resource for designers, developers, project managers—anyone in a position where their work comes in direct contact with the end user.

·Provides a real-world perspective on research and provides advice about how user research can be done cheaply, quickly and how results can be presented persuasively

·Gives readers the tools and confidence to perform user research on their own designs and tune their software user experience to the unique needs of their product and its users

Get all the information you need to successfully practice in the rapidly growing field of gerontological occupational therapy! Occupational Therapy with Aging Adults is a brand new text written by OT experts Karen Frank Barney and Margaret Perkinson that takes a unique interdisciplinary and collaborative approach in covering every aspect of geriatric occupational therapy practice. Readers will explore the entire continuum of care for the aging population along with special considerations for this rapidly growing demographic. This innovative text also covers topical issues spanning the areas of ethical approaches to treatment; nutrition and oral health concerns; pharmacological issues; low vision interventions; assistive technology supports; and more to ensure readers are well versed in every aspect of this key practice area.