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Lo-Dash Essentials, by Adam Boduch
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Implement fast, lean, and readable code effectively with Lo-Dash
About This Book- Understand the key design principles and functions of Lo-Dash and utilize them to deliver efficient performance
- Develop the skills needed to combine elegant, readable code with concise, efficient code
- Learn the effective functions of Lo-Dash, starting from the commonly used basic ones to high-level design ideas, with the help of code examples that will help you gain practical insights into real-world problems
If you are a curious JavaScript developer interested simultaneously in tweaking the efficiency of your code, as well as improving the conciseness of it, and maintaining the readability of it, then this is the book for you. Ideally, the book is intended for readers already working on JavaScript projects and using frameworks such as jQuery and Backbone. Even if you're already using Lo-Dash, this book will show you how to use it efficiently. While extensive JavaScript experience isn't a requirement, you should have at least some prior programming experience in order to best understand the concepts presented.
What You Will Learn- Analyze the difference between arrays, collections, and objects and look at how Lo-Dash treats them
- Understand the subtle differences between iterating over arrays and objects, along with object-creation patterns used with Lo-Dash
- Exploit and work with Lo-Dash functional tools, such as partially applying arguments, and composing higher-order functions
- Explore the various approaches of MapReduce and their relationships with other Lo-Dash functions
- Build your own Lo-Dash application for various environments
- Compare Lo-Dash with other libraries and decide where Lo-Dash is a good fit
- Understand the key Lo-Dash design principles and utilize this knowledge to deliver performant user interfaces
Lo-Dash Essentials walks you through the Lo-Dash utility library, which promises consistency and performance in JavaScript development. This book looks into the most common functions and the various contexts in which they're used. You'll first start with object types and their properties, then you'll dive into larger development patterns, such as MapReduce, and how to chain functionality together. Following this, you'll learn how to make suitable builds for various environments, and discover how high-level patterns complement one another and how they lead to reusable building blocks for applications. Finally, you will gain some practical exposure to Lo-Dash by working alongside other libraries, and learn some useful techniques for improving performance.
- Sales Rank: #2284722 in Books
- Published on: 2015-01-12
- Released on: 2015-01-27
- Original language: English
- Number of items: 1
- Dimensions: 9.25" h x .53" w x 7.50" l, .89 pounds
- Binding: Paperback
- 199 pages
About the Author
Adam Boduch
Adam Boduch is a senior frontend engineer from Toronto. He currently works on delivering innovative products at Virtustream. Adam loves tinkering with the latest JavaScript libraries and is passionate about high-performance user interfaces. Having focused on writing about jQuery in jQuery UI Themes Beginner's Guide and jQuery UI Cookbook, both by Packt Publishing, Adam has ventured into a new territory with this title, Lo-Dash Essentials. He is an avid proponent of Backbone and the ecosystem that surrounds it.
Most helpful customer reviews
3 of 4 people found the following review helpful.
Indispensable guide to functional programming
By David Nunez
Lo-Dash/Underscore JavaScript libraries have quickly become essential tools for me at work and this book helped cement my understanding of them in ways that the API docs and scattered web tutorials failed to do. Web Developers who specialize in Backbone have long been familiar with these libraries, but Angular devs like myself are often considerably less aware of how much more elegant and concise their code can become by leveraging these Lo-Dash. Angular does offer many lite versions of the common operations in Lo-Dash (clone, type checking, etc.), and many devs think that's mostly all they would use it for, so they never go much farther with it. But there are significant benefits to be had by exploring Lo-Dash and your code will get a lot cleaner and more compact because of it.
When I used to work in .NET I grew fond of LINQ and quickly got under the skin of old-school .NET developers who fluent APIs, functional programming, lambdas, re-sharper's recommendations for their code, and change in general. When I transitioned into JavaScript I went looking for a way to approach programming tasks similar to LINQ and found it in Underscore/Lo-Dash. That's not to say Lo-Dash is LINQ for JavaScript, but the mindsets are similar, even though the implementations are different.
One of the biggest problems with Lo-Dash/Underscore right now is the lack of solid articles and tutorials online that will bring new lo-dash users to their personal "aha" moments, and this book is the best option for getting there, in my opinion. Lo-Dash can sneak up on you too, where you think you have a good grasp on it, but then you run across a little tidbit from someone's code in stackoverflow that make you realize there's a lot more to it. Method-chaining, Map-Reduce, and using Tap() are all portions of Lo-Dash that are easy to overlook but which this book does a superb job of guiding you through.
The book covers many core JS concepts, like binding, partials, currying, object manipulation, and you might find yourself quickly dependent on the Lo-Dash implementations of these operations to the point where you forget how you used to do those things in naked JS. Also, two chapters are spent covering Map/Reduce ideas and implementations, and for me this was the biggest takeaway. For those already familiar with Map/Reduce concepts from Hadoop or something else may not experience the same "aha" moment when introduced to the concepts, but no doubt they'll be just as impressed with the way Lo-Dash implements it. By comparison, Java implementations will feel clunky and slow (as if it didn't feel that way already). Additionally, the author includes a chapter on bench-marking, breaking down the specific types of operations and showing where the performance advantages lie and when best to use Lo-Dash over alternative implementations, even showing where you can now make use of lazy-loading.
This book was immensely valuable in improving my grasp of functional programming and is one of the privileged few I keep nearby my desk and liberally marked with sticky notes. It sounds weird, but I'm much more proud of the code I write too and feel that it's much easier to look at. That may be subjective though; it's possible other devs who review my code may throw a fit and slip into some outdated rhetoric on the disadvantages of functional programming and method-chaining, but eventually those dinosaurs will be phased out sent off to the retirement homes.
1 of 2 people found the following review helpful.
Complete, organized, end-to-end tutorial on the full breadth of the Lodash library
By Jim Fathman
The STL revolutionized C++ when it introduced a library of standard containers, iterators, and algorithms. Lodash does the same for JavaScript. I have known for some time that I should reach for Lodash or Underscore when manipulating containers in my Node.js server side code, but I lacked significant Lodash experience and resorted to searching blog posts and scrolling through Lodash online documentation looking for likely code fragments.
What I needed was a complete, organized, end-to-end tutorial that I could work through independent of any particular project to become familiar with the full breadth of the Lodash library. This new book, Lo-Dash Essentials, meets that need admirably. I appreciate the care with which it is written, and I think the author achieved good balance between explanatory text and the kind of short, digestible example code that is most conducive to learning.
Some books just get it right. This is one of those books. If like me you have been wanting to learn Lodash but could just never quite get started, this book is just what you need.
1 of 2 people found the following review helpful.
If Batman were a coder, Lodash would be his utility belt.
By Giuseppe Rodriguez
A lazy developer is a great developer. If you understand this quote then it means you value productivity, and clean syntax when you code. Lodash Esentials by Adam Bodich does exactly that, it provides a clear book and structured set of instructions for getting started with using lodash and all its amazing features. I have started to incorporated lodash more and more with all my MEAN projects and the simple use of _.pluck and _.extend have saved me hours of mindless 'for loops' that lodash already does for you, and that's just touching objects. Lodash has string, array and even function helpers that keeps you focused on what really matters. Getting good code done.
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