Explain the concept of higher-order functions in JavaScript and provide an example of their usage.

Optimizing the performance of JavaScript code is essential for delivering fast and efficient web applications. There are several techniques and best practices that can be employed to improve the performance of JavaScript code. Two important techniques in this regard are code minification and caching. 1. Code Minification: Code minification is the process of reducing the size of JavaScript code by removing unnecessary characters such as white spaces, line breaks, and comments, and shortening variable and function names. Minification helps reduce the file size of JavaScript code, resulting in faster downloads and improved loading times. It is commonly used in production environments to optimize the performance of web applications. Minification tools and libraries, such as UglifyJS and Terser, can be used to automate the process. These tools remove unnecessary code elements without altering the fu....