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Software Design for Flexibility: How to Avoid Programming Yourself into a Corner by Chris Hanson, Gerald Jay Sussman
- Software Design for Flexibility: How to Avoid Programming Yourself into a Corner
- Chris Hanson, Gerald Jay Sussman
- Page: 448
- Format: pdf, ePub, mobi, fb2
- ISBN: 9780262045490
- Publisher: MIT Press
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Overview
Strategies for building large systems that can be easily adapted for new situations with only minor programming modifications. Time pressures encourage programmers to write code that works well for a narrow purpose, with no room to grow. But the best systems are evolvable; they can be adapted for new situations by adding code, rather than changing the existing code. The authors describe techniques they have found effective—over their combined 100-plus years of programming experience—that will help programmers avoid programming themselves into corners. The authors explore ways to enhance flexibility by: • Organizing systems using combinators to compose mix-and-match parts, ranging from small functions to whole arithmetics, with standardized interfaces • Augmenting data with independent annotation layers, such as units of measurement or provenance • Combining independent pieces of partial information using unification or propagation • Separating control structure from problem domain with domain models, rule systems and pattern matching, propagation, and dependency-directed backtracking • Extending the programming language, using dynamically extensible evaluators
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