What is a Slot?


In football, the slot is an offensive player who can run routes that force defenses to shift. The goal is to confuse the defense so that the offense can score. The slot receiver is quick and can create mismatches against linebackers and safeties. He is a vital part of any NFL offense.

Slot (disambiguation) is an aperture or groove in a surface, especially a machine or tool. The term is also used to refer to a specific position in hockey or rugby, a player who plays closest to the goaltender. A slot is a place where a player can receive the ball after it is passed across the ice by an attacking teammate.

In computer programming, a slot is an object that allows a function to be invoked at any point during the execution of another function, with the arguments of the slot being passed through the caller. The use of slots enables developers to design code that is more modular than would be possible using traditional callbacks, as the calls to a private slot do not require a reference to the calling function to be known at compile time. However, using slots requires slightly more overhead than using callbacks, as each slot must be mapped to a receiver and the context of the signal must be passed through to the receiver. This is typically less than the overhead of a non-virtual function call, though.