"Go" brain repair frame Express Beego tornado Flux reflux React JSX Jpg-ios produced

This is a creation in Article, where the information may have evolved or changed.

http://goexpresstravel.com/

The author of today's Express, TJ Holowaychuk, wrote an article announcing the farewell to node. JS and turning to the Go language.

Go Verses Node

If you're doing a distributed job, you'll find the Go language-rich concurrency primitives very helpful. Although we can do similar things with Node's generator, in my opinion, generator will always be half-done. There is no independent stack error handling and reporting, at best medium. I don't want to wait for the community to spend 3 years tidying up (improving), especially if we have a good solution available.

In my opinion, the error handling of the Go language is excellent. You have to consider each error and decide what to do, and Node is good at it. But Node in the following areas, just ...

• You may get duplicate callbacks

• OU may not get a callback at all

• You may get out-of-bound errors

• Emitters may get multiple "error" events

• Missing "error" events sends everything to hell

• Often unsure what requires "error" handlers

• "Error" Handlers is very verbose

• Callbacks Suck

Of course, the author also said, NodeJS is also very good, but he is not interested in the current project to use again. His shift to the go language does not mean that go is perfect.

In addition, the author is looking for someone to maintain because of giving up NodeJS.

Beego is a use of Go development framework, the idea comes from tornado, routing design from Sinatra, support the following features

1. Mvc

2. REST

3. Smart Routing

4. Log debugging

5. Configuration Management

6. Automatic template rendering

7. Layout design

8. Middleware insertion Logic

9. Convenient Json/xml Service

Official website Http://beego.me

The QuickStart code looks like this:

Package main Import (    "Github.com/astaxie/beego") type Maincontroller struct {    beego. Controller} func ( this *Maincontroller) Get () {    this. Ctx.writestring ("Hello World")} func main () {    beego. Router ("/", &maincontroller{})    Beego. Run ()}

Brain:

Tornado is an open-source version of the extensible, non-blocking Web server and its associated tools used by FriendFeed. The web framework looks somewhat like web.py or Google's webapp, but in order to make efficient use of the non-blocking server environment, the web framework also contains useful tools and optimizations that are relevant.

There is a significant difference between the Tornado and the current mainstream WEB server framework, including most Python frameworks: It's a non-blocking server and it's pretty fast. Profiting from its non-blocking approach and the use of Epoll, Tornado can handle thousands of connections per second, which means that Tornado is an ideal web framework for real-time Web services. Our main purpose in developing this WEB server is to deal with the real-time functionality of FriendFeed, where every active user maintains a server connection in the FriendFeed application. (For questions about how to scale up the server to handle the connections of thousands of clients, see c10k problem.) ）

See the Tornado documentation or Tornado original document (mirroring) For more information on the WEB framework.

Flux is a Facebook-developed application architecture that leverages one-way data streams for React. The flux application has three main components: scheduler, storage, and view (React component).

Facebook's engineering manager, Tom Occhino, says that because of their "very large" code base and large organization, they need to "somehow make the code more predictable". This has been done through Flux and React. Flux is a system architecture that is used to propel data unidirectional flow in applications. React is a JavaScript framework for building "predictable" and "declarative" Web user interfaces that have enabled Facebook to develop Web applications faster.

Examples of Flux applications:

• A simple example: TODOMVC

• A little more complicated example: Chat client
  

Flux A data flow period:

views --->  (actions)  ----> Dispatcher --->  (registered callback)  ---> Stores -------+ʌ                                                                                       | |                                                                                        V+--  (controller-views  "Change"  event handlers)  - ---  (stores emit  "Change"  events)  --+

Flux Related documents:

• An application architecture for react

• Flux Architecture

• TODOMVC Guide

and a reflux.

React Getting started: about JSX syntax

posted on April 29, 2015 by Fool's Wharf was browsed 1,985 times

The JSX syntax, like the syntax for writing XML directly in JavaScript code, is essentially a syntactic sugar, and each XML tag is converted into pure JavaScript code by the JSX conversion tool, React the official recommendation to use JSX, Of course, it's also possible to write directly with pure JavaScript code, but using JSX, the structure of the component and the relationship between the components look clearer.

Look at the code:

2. Using JSX
4. React. Render(
6. <div>
8. <div>
10. <div>content</div>
12. </div>
14. </div;
16. Document. getElementById(' example ')
18. );
22. Do not use JSX
24. React. Render(
26. React. CreateElement(' div ', null,
28. React. CreateElement(' div ', null,
30. React. CreateElement(' div ', null, ' content ')
32. )
34. ),
36. Document. getElementById(' example ')
38. );

So in other words, we write an XML tag that essentially calls React.createElement this method and returns an ReactElement object.

View Api:http://www.css88.com/react/docs/top-level-api.html#react.createelement

1. Reactelement createelement(
2. String/reactclass type,
3. [object props],
4. [children ... ]
5. )

The first parameter of this method can be a string that represents an element within an HTML standard, or an object of type Reactclass that represents the custom component we previously encapsulated. The second argument is an object, or a dictionary, that holds all of the intrinsic properties of the element (that is, the value that basically does not change after it is passed in). Starting with the third argument, the subsequent arguments are considered to be child elements of the element.

Transformation

React JSX translates XML-like syntax into native JavaScript, and the tag, attributes, and child elements of an element are passed as arguments to the React.createElement method: Continue reading →

---Koa--Next generation Web development framework based on node. JS Platform

KOA was created by Express's original squad and is committed to becoming a smaller, more expressive, and robust WEB framework. Writing Web applications using KOA, by combining different generator, eliminates the duplication of tedious callback function nesting and greatly improves the efficiency of error handling. KOA does not bind any middleware in the kernel method, it simply provides a lightweight and elegant library of functions, making it handy to write WEB applications.

The JPEG (Joint Photographic Experts Group) is organized by the International Standards Organization (iso:international standardization Organization) and the Advisory Committee on Telephone Telegrams (CCITT: Consultation Commitee of the international Telephone and Telegraph) is the first international digital Image compression standard established for still images, and is the most widely used image compression standard. JPEG can provide lossy compression, so the compression ratio can reach the extent that other traditional compression algorithms cannot match.

Opc

• Industry standard OLE for Process Control
• Organic Light conductor Organicphotoconductor
• Proanthocyanidins OPC
• Overspeed Protection Control
• Optical Proximity effect correction
• Ordinary Portland Cement
• Source Signaling Point encoding
• DNA Purification methods