Callback (computer programming) - Revision history

Karl Jones at 21:18, 13 July 2017

2017-07-13T21:18:51Z

Karl Jones: /* External links */

2016-09-25T15:24:41Z

‎External links

Karl Jones: /* See also */

2016-09-25T14:38:09Z

‎See also

Karl Jones at 20:54, 18 August 2016

2016-08-18T20:54:15Z

Karl Jones: Created page with "In computer programming, a '''callback''' is a piece of executable code that is passed as an argument to other code, which is expected..."

2016-08-18T20:41:21Z

Created page with "In computer programming, a '''callback''' is a piece of executable code that is passed as an argument to other code, which is expected..."

New page

In [[computer programming]], a '''callback''' is a piece of executable code that is passed as an [[Parameter (computer programming)|argument]] to other code, which is expected to call back (execute) the argument at some convenient time.

== Description ==

The invocation may be immediate as in a synchronous callback, or it might happen at a later time as in an asynchronous callback.

In all cases, the intention is to specify a function or subroutine as an entity that is, depending on the language, more or less similar to a [[Variable (computer science)|variable]].

Programming languages support callbacks in different ways, often implementing them with subroutines, lambda expressions, blocks, or function pointers.

== See also ==

* [[Command pattern]]
* [[Computer programming]]
* [[Continuation-passing style]]
* [[Event loop]]
* [[Event-driven programming]]
* [[Implicit invocation]]
* [[Inversion of control]]
* [[libsigc++, a callback library for C++]]
* [[Parameter (computer programming)]]
* [[Signals and slots]]
* [[User exit]]
* [[Variable (computer science)]]

== External links ==

* [https://en.wikipedia.org/wiki/Callback_(computer_programming) Callback (computer programming] @ Wikipedia

[[Category:Computer programming]]

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	* [https://en.wikipedia.org/wiki/Callback_(computer_programming) Callback (computer programming] @ Wikipedia		* [https://en.wikipedia.org/wiki/Callback_(computer_programming) Callback (computer programming] @ Wikipedia
		+	* [http://callbackhell.com/ Callback Hell]

	[[Category:Computer programming]]		[[Category:Computer programming]]

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 * [[Implicit invocation]]
 * [[Inversion of control]]
 * [[Parameter (computer programming)]]
 * [[Signals and slots]]
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 * [https://en.wikipedia.org/wiki/Callback_(computer_programming) Callback (computer programming] @ Wikipedia
 * [http://callbackhell.com/ Callback Hell]
 [[Category:Computer programming]]

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 * [[Event-driven programming]]
 * [[Function (programming)]] - a sequence of program instructions that perform a specific task, packaged as a unit.
 * [[Implicit invocation]]
 * [[Inversion of control]]

@@ Line 7: / Line 7: @@
 In all cases, the intention is to specify a function or subroutine as an entity that is, depending on the language, more or less similar to a [[Variable (computer science)|variable]].
-Programming languages support callbacks in different ways, often implementing them with subroutines, lambda expressions, blocks, or function pointers.
+Programming languages support callbacks in different ways, often implementing them with [[Function (programming)|subroutines]], lambda expressions, blocks, or function pointers.
 == See also ==
@@ Line 16: / Line 16: @@
 * [[Event loop]]
 * [[Event-driven programming]]
 * [[Implicit invocation]]
 * [[Inversion of control]]