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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