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Lodash _.after

Overview

The lodash _.after method is a utility function that returns a new function which invokes a given function only after it has been called a specified number of times.

The _.after method takes two arguments: the number of times the returned function must be called before the original function is invoked, and the original function to be invoked.

Here is an example use of the _.after method:

function greet() {
  console.log("Hello World!");
}
 
const greetAfterTwoCalls = _.after(2, greet);
 
greetAfterTwoCalls(); // nothing happens
greetAfterTwoCalls(); // nothing happens
greetAfterTwoCalls(); // "Hello World!" is logged to the console

In this example, the greet function is only invoked after the greetAfterTwoCalls function has been called twice.

The _.after method is useful in situations where a function should only be called after a certain condition has been met, such as waiting for several asynchronous functions to complete before invoking a final function.

The method is part of the popular Lodash library, so it can be easily imported and used in any JavaScript project. It can help make your code more efficient and easier to read by eliminating the need for complex if statements or callback functions.