Nodejs developing blockchain

1. What a tigress Cried Mrs Linton, letting her go, shaking her hand in pain“ For God's sake,

2. Nodejs needs to install nodejs development environment. Any tool editor can be developed. I prefer vscode editor

3. The main application scenario of node is in the front end. Ali's idea is more appropriate, but it must be noted that node must not do too much business logic. It is only suitable to accept the data generated by others, and then render it or send it directly to the client. If you let node do complex business logic, it will not be worth the loss. Ali people can explain whether the main application scenarios of your node are relatively simple logic
asynchrony in callback mode has obvious defects. The execution order of the program must be guaranteed by callback. Without layer by layer callback, there is no logical order that can be guaranteed, which means that node cannot do complex business logic. JavaScript language itself has been struggling with callbacks. Promise and generator can package callbacks and form formal synchronization in a certain part of the code. However, the evolution of this mode is not complete, and it can not be completely separated from callbacks and achieve complete formal synchronization. However, formal synchronization is definitely the direction of development. This mode can not only obtain the benefits of asynchrony, but also effectively avoid the programming difficulties caused by callback. It can be more simply expressed in business logic
as far as the current environment is concerned, everyone's thinking has not yet turned the corner, and the criticism of callback is not good. These people dare not face the reality, JavaScript is changing, but their brains are not willing to change, and they think callback represents asynchronous.

4. Node.js uses mole mole to divide different functions to simplify application development. Moles mole is a bit like the class library in C + +. Each node.js class library contains a very rich variety of functions. For example, the HTTP mole contains a lot of functions related to HTTP functions, which can help developers to easily compare operations such as HTTP, TCP / UDP, and create HTTP and TCP / UDP servers
it is very convenient to use the mole in the program, just as follows:
here, the HTTP class library is introced, and the reference to the HTTP class library is stored in the HTTP variable. At this time, node.js will search our application to see if there is a node_ Moles directory, and search this directory for HTTP moles. If node.js can't find this directory, it will look for it in the global mole cache. The user can specify the location of the mole through relative or absolute path, such as:
var mymole = require (# 39;)/ myMole.js');
the mole contains a lot of function code fragments. Most of the code in the mole is private, which means that the function methods and variables defined in the mole can only be called in the same mole. Of course, some methods and variables can be exposed outside the mole, which can be implemented by using the exports object.

5. Use nodejs development background completely. But what other sites are already online
I also know that the community of cnodejs is also written by nodejs, snowball seems to be, and the data proct team of Ali is also using nodejs.

6. Of course, the main front and back end to separate, do not use a traditional address, the whole page all refresh, this can not but low efficiency
nodejs is only a rest API server.

7. Hello

node.js is a platform based on the chrome JavaScript runtime, which is used to easily build fast and easy to expand network applications. With the help of event driven, the non blocking I / O model of node.js becomes lightweight and efficient, which is very suitable for data intensive real-time applications running in distributed devices< In February 2009, Ryan Dahl announced on his blog that he was going to create a lightweight web server based on V8 and provide a set of libraries
in May 2009, Ryan Dahl released the initial version of node.js package on GitHub. In the following months, some people began to use node.js to develop applications
in November 2009 and April 2010, lectures on node.js were arranged at both JSCONF conferences
at the end of 2010, node.js was funded by joyent, a cloud computing service provider, and its founder, Ryan Dahl, joined joyent to take full charge of the development of node.js
in July 2011, node.js released the Windows version with the support of Microsoft
on December 22, 2012, luvit 0.6.0 was released, and Lua implemented node.js.

8. If you link to MySQL, you can refer to the tryghost / ghost · GitHub project. The ORM framework you use is bookshelf.js. There are also sequential / sequential · GitHub. If you don't use ORM reference: felixge / node MySQL · GitHub, MVC of restfull API can choose express, KOA, or mcavage / node Restify · GitHub, etc. to search on GitHub, You can choose one with more than one star: search · node API · GitHub

9. The threshold for front end to back end is not language at all, but thought... I do the back-end and directly use nodejs to develop the game server, without any hindrance. However, now let me write the front-end web page, I would rather choose death
in nodejs, the most important thing is that everything is asynchronous. If you understand server development, you should know what asynchronous means. As for the so-called callback shell brought by callback, that is how novice and veteran treat pit.