By Trevor Burnham
The options within the e-book are illustrated with runnable examples drawn from either the browser and the Node.js server framework, incorporating complementary libraries together with jQuery, Backbone.js, and Async.js.
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Functionality of net prone offers leading edge ideas to enhance the functionality of net companies, in addition to QoS (Quality of carrier) specifications. This contains Qos functionality, reliability and safeguard. the writer provides degrees of net providers: the “kernel” (ithe cleaning soap engine which promises messages from one element to a different via a variety of networks), and the “server aspect” (which procedures heavy load / requests).
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This booklet constitutes the court cases of the sixth foreign Workshop on conversation applied sciences for automobiles, Nets4Cars/Nets4Trains/Nets4Aircraft 2014, held in Offenburg, Germany in may possibly 2014. the ten papers provided during this quantity have been rigorously reviewed and chosen from 15 submissions. The ebook additionally comprises four invited papers.
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A choice was made: No game today. So, when the Deferred was rejected, its always and fail callbacks were run. Note that callbacks always run in the order in which they were bound. If the always callback had been bound last, the order of the console output would be reversed. Try hitting Y and N repeatedly. After the first choice is made, there’s no effect! That’s because a Promise can be resolved or rejected only once; after that, it’s inert. We say that a Promise is pending until it’s either resolved or rejected.
A pure Promise only lets you add more callbacks; someone else has to trigger them. 2. 3. info report erratum • discuss Chapter 3. Promises and Deferreds • 34 We can trigger our Deferred with the resolve and reject methods. net/TrevorBurnham/PJ6Bf/. Load the page and hit Y. The console will say the following: ❮ A choice was made: Starting game... You see what happened? When the Deferred was resolved, its always and done callbacks were run. ) Refresh the page and hit N. ❮ A choice was made: No game today.
The architects of Node’s API liked PubSub so much that they decided to include a generic PubSub entity called EventEmitter that other objects can inherit from. Just about every source of I/O in Node is an EventEmitter: file streams, HTTP servers, and even the application process itself. log('Goodnight, ' + name); }); }); 1. info report erratum • discuss PubSub • 21 Countless stand-alone PubSub libraries exist for the browser. js and Spine provide their own EventEmitter-like modules. We’ll talk more about Backbone later in this chapter.