Chapter 5. Data and Functions. Functional Style
Talking about data and functions today when even objects are old news—that’s so 1970s. Yet, sadly, the days when we’ll just tell the computer what we want to do and let it figure out ways to do it are still ahead of us. Until then, functions are an essential component of all major programming disciplines. Fundamentally, any program consists of computations pushing data around; all of the elaborate scaffolding we build—types, objects, modules, frameworks, design patterns—just add interesting properties to the computation, such as modularity, error isolation, or ease of maintenance. A good language allows its user to hit a golden ratio of code that’s there for “doing” to code that’s there for “being.” ...
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