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functor

[fuhngk-ter] /ˈfʌŋk tər/
noun
1.
that which functions.
2.
Linguistics. a function word or affix.
Compare contentive.
Origin
1935-1940
1935-40; funct(ion) + -or2
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for functor
  • The functor call may be omitted if the method being called is non-static.
  • The functor call may be omitted if the method being called is non-static and the object is represented by a simple variable.
functor in Technology

In category theory, a functor F is an operator on types. F is also considered to be a polymorphic operator on functions with the type
F : (a -> b) -> (F a -> F b).
Functors are a generalisation of the function "map". The type operator in this case takes a type T and returns type "list of T". The map function takes a function and applies it to each element of a list.
(1995-02-07)
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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