callbacks #callbacks #async #programming #coding #concurrency

Callbacks

In programming, callbacks are functions passed as arguments to other functions and are intended to be executed after the completion of some operation. They are widely used in asynchronous programming to handle tasks such as event handling, network requests, and other operations that take an uncertain amount of time to complete.

Analogy
 
A customer visits a store to place an order. This is like the first call.
The customer gives to a clerk a list of items, a check to cover their cost and delivery instructions. These are the parameters of the first call including the callback which is the delivery instructions. 
When the staff are able, they deliver the items as instructed which is like calling the callback.
Note, the delivery need not be made by the clerk who took the order. A callback need not be called by the function that accepted the callback as a parameter.
Also, the delivery need not be made directly to the customer. 
A callback need not be to the calling function.
 In fact, a function would generally not pass itself as a callback. Some find the use of back to be misleading since the call is (generally) not back to the original caller as it is for a telephone call.

#callbacks #async #programming #coding #concurrency

[minuteconcepts]

Callbacks

In programming, callbacks are functions passed as arguments to other functions and are intended to be executed after the completion of some operation. They are widely used in asynchronous programming to handle tasks such as event handling, network requests, and other operations that take an uncertain amount of time to complete.

Analogy

A customer visits a store to place an order. This is like the first call.
The customer gives to a clerk a list of items, a check to cover their cost and delivery instructions.
These are the parameters of the first call including the callback which is the delivery instructions.
When the staff are able, they deliver the items as instructed which is like calling the callback.

Note, the delivery need not be made by the clerk who took the order.

A callback need not be called by the function that accepted the callback as a parameter.

Also, the delivery need not be made directly to the customer.