Download Building Node Applications with MongoDB and Backbone: Rapid by Mike Wilson PDF

By Mike Wilson

Construct an program from backend to browser with Node.js, and kick open the doorways to real-time occasion programming. With this hands-on e-book, you are going to easy methods to create a social community software just like LinkedIn and fb, yet with a real-time twist. and you can construct it with only one programming language: JavaScript. in case you are an skilled internet developer unusual with JavaScript, the book's first part introduces you to the project's center applied sciences: Node.js, Backbone.js, and the MongoDB facts shop. you are going to then release into the undertaking - a hugely responsive, hugely scalable software - guided by means of transparent factors and plenty of code examples.

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Additional info for Building Node Applications with MongoDB and Backbone: Rapid Prototyping and Scalable Deployment

Example text

Var total = 0; ... forEach(function(value) { ... total+=value; ... }); ... return total; ... find(); { "_id" : "Jamie Munro", "value" : 2 } { "_id" : "Kristina Chodorow", "value" : 2 } { "_id" : "Stoyan Stefanov", "value" : 3 } With some data in the collection, create a map function that will emit an author name and the number 1 when given a document. emit is a MongoDB helper function that groups objects by keys; in this case, the key is the author name found in each document. I used the value 1 for convenience: each time MongoDB reads a book object, it will count as 1 book credit toward that author.

In fact, what we now know as the router originated as a controller, with each route declared when the Con troller object was extended. That setup is problematic because it tightly couples the concept of a controller, which is intended to control a model based upon input from a view, with routing, which is intended to navigate the end user between views. By moving Router to its own prototype, the makers of Backbone have elegantly separated the in‐ terface mechanics from the manipulation and display of models.

Js module that exposes a function getFlag Width used for calculating the regulation fly (width) of an American flag. 9 times the length of the hoist (height) of the flag; this ratio is stored in the variable FLAG_WIDTH. The function getFlagWidth takes the hoist height and multiplies it by the width ratio, yielding the width of the flag appropriate for any given height. Example 2-9. getFlagWidth = function(h) { return h * FLAG_WIDTH; }; When you include this file in your application, you will be able to access the getFlag Width function, which is exposed using the exports keyword, but not the FLAG_WIDTH variable.

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