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1 point by fjl 3294 days ago | link | parent

the key point in this is conceptual closedness, designing things to fit into each other, leaving room for your solution to fill in the blanks.

arc/scheme (and, to a degree, common lisp) code shows this much clearer than other languages. abelson and sussman followed that route in SICP, too, but you need to read between the lines.