Thompson - Getting Started with GEO, CouchDB, and Node.js
Here you can read online Thompson - Getting Started with GEO, CouchDB, and Node.js full text of the book (entire story) in english for free. Download pdf and epub, get meaning, cover and reviews about this ebook. City: Sebastopol, CA, year: 2011, publisher: OReilly Media, Inc., genre: Computer. Description of the work, (preface) as well as reviews are available. Best literature library LitArk.com created for fans of good reading and offers a wide selection of genres:
Romance novel
Science fiction
Adventure
Detective
Science
History
Home and family
Prose
Art
Politics
Computer
Non-fiction
Religion
Business
Children
Humor
Choose a favorite category and find really read worthwhile books. Enjoy immersion in the world of imagination, feel the emotions of the characters or learn something new for yourself, make an fascinating discovery.
Getting Started with GEO, CouchDB, and Node.js: summary, description and annotation
We offer to read an annotation, description, summary or preface (depends on what the author of the book "Getting Started with GEO, CouchDB, and Node.js" wrote himself). If you haven't found the necessary information about the book — write in the comments, we will try to find it.
Abstract: Todays mobile devices have GPS and standard APIs to give you access to coordinates - but what can you do with that data? With this concise book, application developers learn how to work with location data quickly and easily, using Node.js, CouchDB, and other open source tools and libraries. Read more...
Thompson: author's other books
Who wrote Getting Started with GEO, CouchDB, and Node.js? Find out the surname, the name of the author of the book and a list of all author's works by series.
Getting Started with GEO, CouchDB, and Node.js — read online for free the complete book (whole text) full work
Below is the text of the book, divided by pages. System saving the place of the last page read, allows you to conveniently read the book "Getting Started with GEO, CouchDB, and Node.js" online for free, without having to search again every time where you left off. Put a bookmark, and you can go to the page where you finished reading at any time.
Font size:
Interval:
Bookmark:
Beijing Cambridge Farnham Kln Sebastopol Tokyo
for more information on this offer!
Please note that upgrade offers are not available from sample content.
Where. Whether it refers to where you have been, where you are, or where you are going, the concept of where is important. Where links data to the physical world. A shopping list can be a very useful collection of data on its own, but that data can be even more useful with more context. If you map the location of the stores needed for each item on the shopping list, then you can create an efficient route to acquire the items on the list. Driving directions, traffic information, and weather can impact the route. All of this data can be fetched based on the location data added to the simple shopping list.
Location can add a new filter or layer of insight into existing data. It makes all kinds of new applications possible. In the past, using location or geographic data meant using complex or at times expensive software. Datasets could be costly or hard to find. Developing using open source tools such as Node.js and CouchDB has recently made working with location data simple and fast.
The following typographical conventions are used in this book:
Indicates new terms, URLs, email addresses, filenames, and file extensions.
Constant widthUsed for program listings, as well as within paragraphs to refer to program elements such as variable or function names, databases, data types, environment variables, statements, and keywords.
Constant width boldShows commands or other text that should be typed literally by the user.
Constant width italicShows text that should be replaced with user-supplied values or by values determined by context.
This icon signifies a tip, suggestion, or general note.
This icon indicates a warning or caution.
This book is here to help you get your job done. In general, you may use the code in this book in your programs and documentation. You do not need to contact us for permission unless youre reproducing a significant portion of the code. For example, writing a program that uses several chunks of code from this book does not require permission. Selling or distributing a CD-ROM of examples from OReilly books does require permission. Answering a question by citing this book and quoting example code does not require permission. Incorporating a significant amount of example code from this book into your products documentation does require permission.
We appreciate, but do not require, attribution. An attribution usually includes the title, author, publisher, and ISBN. For example: Getting Started with GEO, CouchDB, and Node.js by Mick Thompson (OReilly). Copyright 2011 David Thompson, 978-1-449-30752-3.
If you feel your use of code examples falls outside fair use or the permission given above, feel free to contact us at .
Safari Books Online is an on-demand digital library that lets you easily search over 7,500 technology and creative reference books and videos to find the answers you need quickly.
With a subscription, you can read any page and watch any video from our library online. Read books on your cell phone and mobile devices. Access new titles before they are available for print, and get exclusive access to manuscripts in development and post feedback for the authors. Copy and paste code samples, organize your favorites, download chapters, bookmark key sections, create notes, print out pages, and benefit from tons of other time-saving features.
OReilly Media has uploaded this book to the Safari Books Online service. To have full digital access to this book and others on similar topics from OReilly and other publishers, sign up for free at http://my.safaribooksonline.com.
Please address comments and questions concerning this book to the publisher:
| OReilly Media, Inc. |
| 1005 Gravenstein Highway North |
| Sebastopol, CA 95472 |
| 800-998-9938 (in the United States or Canada) |
| 707-829-0515 (international or local) |
| 707-829-0104 (fax) |
We have a web page for this book, where we list errata, examples, and any additional information. You can access this page at:
| http://oreilly.com/catalog/97814493075232 |
To comment or ask technical questions about this book, send email to:
For more information about our books, courses, conferences, and news, see our website at http://www.oreilly.com.
Find us on Facebook: http://facebook.com/oreilly
Follow us on Twitter: http://twitter.com/oreillymedia
Watch us on YouTube: http://www.youtube.com/oreillymedia
Node.js has quickly become a very popular asynchronous framework for JavaScript. It is built on top of the same V8 engine that the Chromium and Google Chrome web browsers use to interpret JavaScript. With the addition of networking and file system API support, it has quickly proved to be a capable tool for interacting with IO in a asynchronous way.
There are many other libraries in several other languages that can accomplish the same asynchronous handling of IO. There are different conventions, schools of thought, and preferences of developers. Node.js uses callbacks for the developer to notified of the progress of asynchronous operations. Callbacks are nothing new for developers accustom to Pythons Twisted library or other similar frameworks. Callbacks can be a very easy and powerful way to manage the flow of an appilication, but as with anything new they also offer an opportunity to trip up a developer. The first thing to keep in mind when getting started with asynchronous development is that execution might not follow the same squence every time.
In order to install Node.js, download the source and build it. The main Node.js web page at http://nodejs.org can be very helpful in linking to downloads, source code repositories, and documentation. The master branch of the repository is kept in a semi-unstable state, so before building check out the most recent tagged version. For example: v0.4.9.
The Node.js package manager or NPM is an extremely useful tool. It can handle installing, updating, and removing packages and their dependencies. Creating packages is also simple since the configuration for the package is contained in the package.json file. Installation instructions for NPM are included in the Node.js repository.
An Example case to show how asynchronous IO works is to make two HTTP requests and then combine the results. In the first example the request to the second web API will be nested in the callback from the first. This might seem like the easiest way to combine the results, but will not be the most effective usage of asynchronous IO.
Google provides an API that returns the elevation for a given latitude and longitude. The example requests will be of two points random points on Earth. To start create a function that will handles the request to the Google elevation API as well as parses the response:
Font size:
Interval:
Bookmark:
Similar books «Getting Started with GEO, CouchDB, and Node.js»
Look at similar books to Getting Started with GEO, CouchDB, and Node.js. We have selected literature similar in name and meaning in the hope of providing readers with more options to find new, interesting, not yet read works.
Discussion, reviews of the book Getting Started with GEO, CouchDB, and Node.js and just readers' own opinions. Leave your comments, write what you think about the work, its meaning or the main characters. Specify what exactly you liked and what you didn't like, and why you think so.