Rapid Underscore.js – Packt Publishing

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Rapid Underscore.js

Harness the power of the extensive range of functionalities that come with Underscore.js

Harness the power of the extensive range of functionalities that come with Underscore.jsAbout This Video

Take functional programming to the next level with the aid of the Underscore library

Learn why Underscore is a great addition to any JavaScript programmer’s toolbelt

Create an exciting International Space Station project, one step at a time

In Detail

Underscore.js is a library of utility functions for JavaScript that helps to minimize the complexity most users face in building programs, that is, simplifying their JavaScript code. It can be used with any other library or framework and provides many useful methods for this very reason. It works great as an addition to jQuery, Angular.js, Backbone.js, or any other framework you might be using, or you can use it with plain old JavaScript.

Rapid Underscore.js is a quick introduction to making the most of the Underscore.js library. Using a practical example project it shows you not just how but why you would want to use Underscore.js’ methods.

We’ll start off by learning what the Underscore.js library is and why you would want to use it, and discover how to incorporate Underscore.js into an existing Browser or Node.JS-based project. Further, we will dive deeper into the Underscore.js concepts that can help us deal with arrays and objects using Underscore’s functions for filtering, grouping, and sorting. We will explore JavaScript’s “this” context to manage binding and see how new functions can easily be made by partially applying the existing functions. We’ll control the running of a function using debounce, throttle, once, and after, and also how this leads to simplifying techniques when building user interfaces and dealing with outside data sources. Finally, we’ll learn Underscore’s HTML templating abilities and chaining and finish up with a brief taste of libraries that extend Underscore.

By the end of this course, you will understand how Underscore.js helps you to efficiently develop web applications using a functional approach to JavaScript.

Course Curriculum

Introduction to Underscore

• What Is Underscore.js? (4:18)
• Using Underscore.js on Your Page (3:11)

Processing Arrays

• Iteration and Mapping (5:35)
• Finding and Filtering (3:34)
• Sorting and Grouping (3:32)

Dealing with Objects

• Sorting and Grouping (3:47)
• Combining Objects and Plucking Keys (4:03)

Functions

• Binding Functions (4:11)w
• Debouncing Functions (2:58)rt
• The “after” Method (3:36)

Wrapping Up

• Templating with Underscore (5:10)
• Chaining (3:02)
• Beyond Underscore (2:01)