Functors

Some articles on functors, functor:

Libsigc++
... then wrapped using template calls to produce function objects (functors) which can be bound to a signal ... Each signal can be connected to multiple functors thus creating an observer pattern through which a message can be distributed to multiple anonymous listener objects ... Reference counting based object lifespan tracking was used to disconnect the functors from signals as objects are deleted ...
Monoidal Natural Transformation
... natural transformation between those functors is a natural transformation between the underlying functors such that the diagrams and commute for every ... between symmetric monoidal functors ...
Glossary Of Category Theory - Functors
... A functor F is said to be a constant provided that F maps every object in a category to the same object A and every morphism to the identity on A ...
Cartan–Eilenberg Resolution - Definition - Hyper-derived Functors
... Given a right exact functor, one can define the left hyper-derived functors of F on a chain complex A∗ by constructing a Cartan–Eilenberg resolution ε P∗∗ → A ... Similarly, one can also define right hyper-derived functors for left exact functors ...
Standard Template Library - Composition - Functors
... Instances of such classes are called functors or function objects ... Functors allow the behavior of the associated function to be parameterized (e.g ... through arguments passed to the functor's constructor) and can be used to keep associated per-functor state information along with the function ...