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3 lines
555 B
Racket
3 lines
555 B
Racket
#lang quad/typewriter
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@(dynamic-require 'quad/quad '$quad)[(hasheq 'link "http://beautfifulracket.com") '("An expression that")] is not a value can always be partitioned into two parts: a redex, which is the part that changed in a single-step simplification (highlighted), and the continuation, which is the evaluation context surrounding an expression. In (- 4 (+ 1 1)), the redex is (+ 1 1), and the continuation is (- 4 []), where [] takes the place of the redex. That is, the continuation says how to "continue" after the redex is reduced to a value. |