Node.js实战：专家指南

Node.js

Practice

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preface

When Node.js arrived in 2009, we knew something was different. JavaScript on the server

wasn’t anything new. In fact, server-side JavaScript has existed almost as long as client-

side JavaScript. With Node, the speed of the JavaScript runtimes, coupled with the event-

based parallelism that many JavaScript programmers were already familiar with, were

indeed compelling. And not just for client-side JavaScript developers, which was our

background—Node attracted developers from the systems level to various server-side

backgrounds,

PHP to Ruby to Java. We all found ourselves inside this movement.

At that time, Node was changing a lot, but we stuck with it and learned a whole lot

in the process. From the start, Node focused on making a small, low-level core library

that would provide enough functionality for a large, diverse user space to grow.

Thankfully, this large and diverse user space exists today because of these design deci-

sions early on. Node is a lot more stable now and used in production for numerous

startups as well as established enterprises.

When Manning approached us about writing an intermediate-level book on Node,

we looked at the lessons we had learned as well as common pitfalls and struggles we

saw in the Node community. Although we loved the huge number of truly excellent

third-party modules available to developers, we noticed many developers were getting

less and less education on the core foundations of Node. So we set out to write Node in

Practice to journey into the roots and foundations of Node in a deep and thorough

manner, as well as tackle many issues we personally have faced and have seen others

wrestle with.

ABOUT THIS BOOK

xix

Node.js’s purpose and function. Then chapters 2 through 8 each cover in depth a dif-

ferent core aspect of Node from buffers to streams, networking to child processes.

Part 2 focuses on real-world development recipes. Chapters 9 through 12 will help

you master four highly applicable skills—testing, web development, debugging, and

running Node in production. In addition to Node core modules, these sections

include the use of various third-party modules.

Part 3 guides you through creating your own Node modules in a straightforward

manner that ties in all kinds of ways to use npm commands for packaging, running,

testing, benchmarking, and sharing modules. It also includes helpful tips on version-

ing projects effectively.

There are 115 techniques in the book, each module covering a specific Node.js

topic or task, and each divided into practical Problem/Solution/Discussion sections.

Code conventions and downloads

All source code in the book is in a

fixed-width

font

this

, which sets it off from

the surrounding text. In many listings, the code is annotated to point out the key con-

cepts, and numbered bullets are sometimes used in the text to provide additional

information about the code.

This book’s coding style is based on the Google JavaScript Style Guide.

That

means we’ve put

var

statements on their own lines, used

camelCase

to format func-

tion and variable names, and we always use semicolons. Our style is a composite of the

various JavaScript styles used in the Node community.

Most of the code shown in the book can be found in various forms in the sample

source code that accompanies it. The sample code can be downloaded free of charge

from the Manning website at www.manning.com/Node.jsinPractice, as well as from

GitHub at the following link: https://github.com/alexyoung/nodeinpractice.

Author Online forum

Purchase of Node.js in Practice includes free access to a private web forum run by Man-

ning Publications where you can make comments about the book, ask technical ques-

tions, and receive help from the authors and from other users. To access the forum

and subscribe to it, point your web browser to www.manning.com/Node.jsinPractice.

This page provides information on how to get on the forum once you’re registered,

what kind of help is available, and the rules of conduct on the forum.

The Author Online forum and the archives of previous discussions will be accessi-

ble from the publisher’s website as long as the book is in print.

You can also contact the authors at the following Google Group

URL: https://

groups.google.com/forum/#!forum/nodejsinpractice.

https://google-styleguide.googlecode.com/svn/trunk/javascriptguide.xml

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Node.js实战：专家指南

Node.js in Practice(Manning,2014)

Node.js-In-Practice:Node.js in Practice 是 115 个经过彻底测试的示例和即时有用的技术的集合，保证使任何 Node 应用程序运行更顺畅

Node.js in Practice (includes 115 techniques)

npm config set prefix "F:\Node.js\node_global" npm config set cache "F:\Node.js\node_cache"

Error: EPERM: operation not permitted, mkdir 'D:\node.js\node_modules\.npm-Df0J87nF'

E:\Node.js\node_cache\node_modules\@vue\cli\node_modules\parse-json\index.js:48 throw jsonError; ^

如何在Node.js环境中使用process.env.NODE_ENV？

vue项目中调用Node.js 的 child_process 模块

vue项目中使用Node.js的 child_process 模块运行python脚本

Error: Cannot find module 'E:\node.js\node_global\node_modules\yarn\bin\yarn.js'

vue项目中调用Node.js 的 child_process 模块运行python脚本

查看这段代码的错误： if set_node._name == "NODE_ABS: NODE referenced but not defined": node_id = ansa.base.GetEntityId(node) undefined_nodes.append(node_id) print("Undefined nodes:") for node_id in undefined_nodes: print(node_id)

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