Continuing from last episode's theme of modules – NodeJS provides access to re-usable modules through a package manager called NPM, the Node Package Manager. In this episode, you'll learn the basics of installing modules, including them in your project and using them in your code. You'll see how to install underscore.js, how to require it in to your code, how to access the functions that are exported from it and how to make the use of this module known by using a package.json file.
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