Callback: meaning, definitions and examples

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callback

[ˈkɔːl.bæk ]

Definition

^{Context #1 | Noun}

programming context

A callback is a function that is passed as an argument to another function and is executed after that function has completed. This concept is common in asynchronous programming, where a callback is used to handle the result of an operation once it is finished. Callbacks allow for code to be executed in response to certain events, thus enabling developers to create non-blocking I/O operations. They are prevalent in JavaScript, where functions like `setTimeout` and event handlers utilize callbacks extensively.

Synonyms

event listener, function reference, handler.

Examples of usage

The function will call the provided callback once the data is loaded.
Please provide a callback function to handle the response.
In this example, the handleClick function is a callback.
The API supports callbacks for improving performance.

Interesting Facts

Etymology

The term 'callback' comes from the combination of 'call', meaning to contact, and 'back', meaning to return.
It has been used since at least the 1960s in the context of telecommunication.
In programming, it evolved to describe a function that is passed as an argument to another function, a usage that emerged in the late 20th century.

Technology

In computer programming, callbacks are essential for asynchronous operations, allowing tasks to run without blocking the main program.
JavaScript heavily relies on callbacks for functions like event handling and HTTP requests, making them fundamental to interactive web applications.
They help manage the flow of execution in applications, ensuring that certain code runs only after a specific task is complete.

Pop Culture

The term 'callback' has made its way into popular television and movies, especially in scenes involving auditions where actors are invited back for a second look.
In the music industry, a 'callback' can refer to revisiting a previous song concept or style in a new project.
Some iconic films or series feature a callback as a comedic or nostalgic element, referencing something that occurred earlier in the story.

Psychology

Callbacks can trigger the recall of memories associated with the original event, leveraging the principle of context-dependent memory.
The phenomenon of ‘recall’ in therapy is akin to a 'callback,' where clients revisit earlier thoughts or feelings for deeper understanding.
Reminders that create a 'callback' to past behavior can influence decision-making and emotional responses.

Business

In customer service, a 'callback' assures clients that their concerns are taken seriously and handled promptly.
Some businesses adopt a 'callback' system to reduce hold times, allowing customers to receive a call when their issue can be addressed.
Marketers use callbacks to remind clients of previous interactions, reinforcing relationships and increasing sales opportunities.

Translations

Translations of the word "callback" in other languages:

🇵🇹 callback

🇮🇳 कॉलबैक

🇩🇪 Rückruf

🇮🇩 panggilan balik

🇺🇦 колбек

🇵🇱 callback

🇯🇵 コールバック

🇫🇷 rappel

🇪🇸 callback

🇹🇷 geri arama

🇰🇷 콜백

🇸🇦 استدعاء

🇨🇿 zpětné volání

🇸🇰 spätné volanie

🇨🇳 回调

🇸🇮 klic nazaj

🇮🇸 svar

🇰🇿 кері қоңырау

🇬🇪 უკანასკნელი ზარი

🇦🇿 geri çağırış

🇲🇽 callback