Barbara Liskovis professor of computer science at MIT. Well known for her contributions to programming methodology and software engineering, she is co-author (with John Guttag) of the influential book,Abstraction and Specification in Program Development.Barbara is the recipient of the 2008<A title=http://awards.acm.org/homepage.cfm?awd=140 href="http://awards.acm.org/homepage.cfm?awd=140">A.M. Turing Award</A>, one of the highest honors in science and
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Barbara Liskovis professor of computer science at MIT. Well known for her contributions to programming methodology and software engineering, she is co-author (with John Guttag) of the influential book,Abstraction and Specification in Program Development.Barbara is the recipient of the 2008A.M. Turing Award, one of the highest honors in science and engineering.
0201657686AB04062001
Written by a world-renowned expert on programming methodology, and the winner of the 2008 Turing Award, this book shows how to build production-quality programs--programs that are reliable, easy to maintain, and quick to modify. Its emphasis is on modular program construction: how to get the modules right and how to organize a program as a collection of modules. The book presents a methodology effective for either an individual programmer, who may be writing a small program or a single module in a larger one; or a software engineer, who may be part of a team developing a complex program comprised of many modules. Both audiences will acquire a solid foundation for object-oriented program design and component-based software development from this methodology.
Because each module in a program corresponds to an abstraction, such as a collection of documents or a routine to search the collection for documents of interest, the book first explains the kinds of abstractions most useful to programmers: procedures; iteration abstractions; and, most critically, data abstractions. Indeed, the author treats data abstraction as the central paradigm in object-oriented program design and implementation. The author also shows, with numerous examples, how to develop informal specifications that define these abstractions--specifications that describe what the modules do--and then discusses how to implement the modules so that they do what they are supposed to do with acceptable performance.
Other topics discussed include:
Encapsulation and the need for an implementation to provide the behavior defined by the specification
Tradeoffs between simplicity and performance
Techniques to help readers of code understand and reason about it, focusing on such properties as rep invariants and abstraction functions
Type hierarchy and its use in defining families of related data abstractions
Debugging, testing, and requirements analysis
Program design as a top-down, iterative process, and design patterns
The Java programming language is used for the book's examples. However, the techniques presented are language independent, and an introduction to key Java concepts is included for programmers who may not be familiar with the language.
Constructing production-quality programs--programs that are used over an extended period of time--is well known to be extremely difficult. The goal of this book is to improve the effectiveness of programmers in carrying out this task. I hope the reader will become a better programmer as a result of reading the book. I believe the book succeeds at improving programming skills because my students tell me that it happens for them.
What makes a good programmer? It is a matter of efficiency over the entire production of a program. The key is to reduce wasted effort at each stage. Things that can help include thinking through your implementation before you start coding, coding in a way that eliminates errors before you test, doing rigorous testing so that errors are found early, and paying careful attention to modularity so that when errors are discovered, they can be corrected with minimal impact on the program as a whole. This book covers techniques in all these areas.
Modularity is the key to writing good prog
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