Convert Function From Variadic

Introduction

In this lab, we will explore the concept of converting a variadic function into an array function in JavaScript. We will use a closure and the spread operator to map the array of arguments to the inputs of the function. By the end of this lab, you will be able to create a reusable function that accepts an array of arguments instead of individual arguments.

Skills Graph

Converting a Variadic Function

To convert a variadic function, follow these steps:

1. Open the Terminal/SSH and type node to start coding.
2. Create a function that takes a variadic function.
3. Use a closure and the spread operator (...) to map the array of arguments to the inputs of the function.
4. Return a new function that accepts an array of arguments and calls the original variadic function with those arguments.

Here's an example of how to use this technique to convert the Math.max function:

const spreadOver = (fn) => (argsArr) => fn(...argsArr);

const arrayMax = spreadOver(Math.max);
arrayMax([1, 2, 3]); // 3

Summary

Congratulations! You have completed the Convert Function From Variadic lab. You can practice more labs in LabEx to improve your skills.