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With higher-order functions, we begin to see a more powerful kind of
abstraction: some functions express general methods of computation, independent
of the particular functions they call.
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1.6 Higher-Order Functions153589902
1.6.2 Functions as General Methods
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Hide We introduced user-defined functions as a mechanism for abstracting patterns of
numerical operations so as to make them independent of the particular numbers
involved. <span>With higher-order functions, we begin to see a more powerful kind of
abstraction: some functions express general methods of computation, independent
of the particular functions they call.
Despite this conceptual extension of what a function means, our environment
model of how to evaluate a call expression extends gracefully to the case of
higher-order functions, withou Summary
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