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Lodash _.wrapperNext

Overview

The _.wrapperNext method is a function in the Lodash library that creates a new function that executes a given function with the parameters given to it and the functions previously wrapped around it. This method provides a powerful way to modify the behavior of an existing function by wrapping it with additional functionality.

Here is a detailed explanation of the _.wrapperNext method:

Syntax: _.wrapperNext(func, wrapper)

Parameters:

  • func (Function): The function to wrap
  • wrapper (Function): The function that will be used to wrap the original function

Return value: (Function): Returns the new wrapped function.

Description:

The _.wrapperNext method allows you to create a new function that executes a given function with the parameters given to it and the functions previously wrapped around it. The wrapper function is called with two arguments, the original function and a reference to the next wrapper, which is used to call the wrapped function. The returned function can accept arguments to pass to the wrapped function.

Example usage:

function greet(name) {
  return "Hello, " + name + "!";
}

// create a wrapper function
function shoutWrapper(next, func, name) {
  var result = next(func, name);
  return result.toUpperCase();
}

// wrap greet with shoutWrapper
var greetShout = _.wrapNext(greet, shoutWrapper);

// call the wrapped function
greetShout("World"); // returns "HELLO, WORLD!"

In this example, the shoutWrapper function is used to wrap the greet function. The greetShout variable is assigned the new wrapped function, which can then be called with arguments. When greetShout is called with the argument "World," shoutWrapper is called, which returns a shouty version of the result of calling the original function with the argument "World".