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higher-order function
(HOF) A function that can take one or more functions as
argument and/or return a function as its value. E.g. map in
(map f l) which returns the list of results of applying
function f to each of the elements of list l. See also
curried function.
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high colour « high density « Higher Education National Software Archive « higher-order function » higher-order macro » High-level Data Link Control » high-level language
higher-order macro
A means of expressing certain higher-order functions in a
first order language. Proposed by Phil Wadler. Higher-order
macros cannot be recursive at the top level but they may
contain recursive definitions. E.g.
map f l = m l
where
m [] = []
m (x:xs) = f x : m xs
Expanding a call to this macro is equivalent to specialising a
call to map in its first argument.
See partial evaluation.
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Nearby terms:
high density « Higher Education National Software Archive « higher-order function « higher-order macro » High-level Data Link Control » high-level language » high memory area
This article was derived from the Free Online Dictionary of Computers and is available under ther terms of the GNU Free Documentation License.
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