By Marc Harter, Alex R. Young
Node.js in perform is a suite of absolutely demonstrated examples that provide recommendations to the typical and not-so-common matters you face in case you roll out Node. You'll dig into vital issues just like the bits and bobs of event-based programming, how and why to exploit closures, tips to constitution purposes to exploit end-to-end JavaScript apps, and more.
About the Book
You've determined to exploit Node.js on your subsequent undertaking and also you want the talents to enforce Node in creation. it'd be nice to have Node specialists Alex younger and Marc Harter at your aspect that will help you take on these day by day demanding situations. With this booklet, you can!
Node.js in perform is a set of a hundred and fifteen completely validated examples and immediately worthy recommendations certain to make any Node program pass extra easily. Following a common sense Problem/Solution layout, those experience-fueled innovations hide vital themes like event-based programming, streams, integrating exterior purposes, and deployment. The abundantly annotated code makes the examples effortless to stick to, and strategies are equipped into logical clusters, so it's a snap to discover what you're taking a look for.
Written for readers who've a realistic wisdom of JavaScript and the fundamentals of Node.js.
What's Inside
universal utilization examples, from uncomplicated to advanced
Designing and writing modules
trying out and debugging Node apps
Integrating Node into latest structures
Read or Download Node.js in Practice PDF
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Additional resources for Node.js in Practice
Example text
3 Using a stream Now that you’ve seen how to make a stream class, you’re probably dying to try it out. js, and add the code shown in the next listing. js file. com. js. It should display something like Total matches: 24. You can experiment with it by changing the URL that it fetches. 1 B and then instantiates it with the text 'book' C. It also downloads the text from a website using Node’s standard http module D and then pipes the result through our CountStream class E. pipe(countStream). When you pipe data, it doesn’t matter how big it is or if the network is slow: the CountStream class will dutifully count matches until the data has been processed.
IsBuffer(buf); // true }); isBuffer returns true if it’s a Buffer. But many times you already know a file’s encoding, and it’s more useful to get the data as an encoded string instead. We’ll look at converting between Buffers and other formats in this section. TECHNIQUE 15 Converting buffers into other formats By default, Node’s core APIs return a buffer unless an encoding is specified. But buffers easily convert to other formats. In this next technique we’ll look at how to convert buffers. ■ Problem You want to turn a Buffer into plain text.
Js. It should display something like Total matches: 24. You can experiment with it by changing the URL that it fetches. 1 B and then instantiates it with the text 'book' C. It also downloads the text from a website using Node’s standard http module D and then pipes the result through our CountStream class E. pipe(countStream). When you pipe data, it doesn’t matter how big it is or if the network is slow: the CountStream class will dutifully count matches until the data has been processed. This Node program does not download the entire file first!
