doSomethingonComplete

doSomethingonComplete is a term used in codebases to designate a completion callback for an asynchronous operation. It is not a language feature; rather, it is a user-defined function or parameter name that follows a verb phrase plus onComplete. Naming conventions vary, and some projects spell it as doSomethingOnComplete; the essential idea is that the function is intended to run after the initial task finishes.

Usage patterns typically involve passing doSomethingonComplete as a parameter to an asynchronous function or assigning it as a property on an object. When the operation completes, the runtime or task scheduler invokes doSomethingonComplete, often with arguments such as the result of the operation or an error. This pattern helps separate the core task from the follow-up actions to be taken once the task is done.

In practice, a function performing a network request or a long-running computation might accept a callback named doSomethingonComplete. For example, after obtaining data, the implementation would call doSomethingonComplete(data). In this context, the name signals to developers that the callback contains code to run after completion rather than during execution.

Design considerations include readability and consistency. Using a descriptive completion callback name can improve clarity, but inconsistent naming can cause confusion, especially when multiple asynchronous operations are present. Alternatives include standard callbacks named onComplete, or modern approaches such as promises or async/await, which consolidate completion handling in a more uniform form.

See also: callbacks, completion handlers, onComplete, asynchronous programming.