Premate is a slang term used in multiplayer gaming communities, which is a corruption of the word premade. It refers to a group of players who have organized and formed a team before joining a game or match. This term is often used in online games such as MOBAs (Multiplayer Online Battle Arena) or first-person shooters.
Functor
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A functor, or function object, is a class in C with the () [operator] [overloaded]. Functors are used a lot in the standard library to do custom comparisons. Theyre used in place of function [pointers] because sometimes you need to store a value or remember something (ie. put the functor into a special state for whatever purpose), a functor can do this, a function pointer cant (without messing with global variables).
Functor meaning & definition 1 of Functor.
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