Comparison of Ethereum fabric

1. Go full stack + blockchain course:
a total of 22 weeks, divided into five stages,
the first stage is 4 weeks, go language foundation and network concurrency, learning the introctory go language,
the second stage is 4 weeks, go language practical web development, crawler development, cryptography, consensus algorithm, realizing lightweight public chain, learning the website and crawler that can develop golang, Achieve lightweight blockchain
stage 3, 4-week Ethereum source code analysis and smart contract DAPP development, master Ethereum core and smart contract development, as well as blockchain,
stage 4, 4-week super ledger, bitcoin EOS, source code analysis and smart contract practice, master super ledger development, cat bitcoin, bifurcated EOS after learning, As well as DAPP development of smart contract
phase 5, 6-week project practice, five enterprise level projects, and one year of blockchain project experience after learning
from the characteristics of the language itself, go is a very efficient language, which highly supports concurrency. Go language itself pays more attention to distributed system, and concurrency processing is relatively good, such as advertising and search, That kind of high concurrency server
go language advantages:
excellent performance, can be directly compiled into machine code, does not rely on other libraries, go is extremely fast. Its performance is similar to Java or C + +
concurrency is supported at the language level, which is the biggest feature of go. It is born to support concurrency, and go is the concurrency supported in gene, which can make full use of multi-core and make it easy to use concurrency
the built-in runtime supports garbage collection, which is one of the features of dynamic language. Although GC is not perfect at present, it is enough to cope with most of the situations we can encounter, especially GC after go1.1
it's easy to learn. The authors of go language all have the gene of C, so go naturally has the gene of C. There are 25 go keywords, but the expressive ability is very strong. It almost supports most of the features you've seen in other languages: inheritance, overloading, object, etc
rich standard libraries, go has built a large number of libraries, especially the network library, which is also my favorite part< As like as two peas, br / > built-in powerful tools, Go language is built with many tools chain, the best should be gofmt tools, automatic formatting code, make team review become so simple, code format is exactly the same, it is very difficult to think differently.
cross platform compilation and fast compilation. Compared with the sluggish compilation speed of Java and C + +, the fast compilation time of go is a major efficiency advantage
disadvantages of go language:
package management: package management of go language is absolutely not perfect. By default, it has no way to make a specific version of the dependency library, nor can it create replicable builds. In contrast, python, node and Ruby all have better package management systems. However, with the right tools, the package management of go language can also perform well
lack of development framework: go language does not have a major framework, such as Ruby's rails framework, Python's Django framework or PHP's laravel. This is a heated discussion in the go language community, because many people think that we should not start with using frameworks. This is true in many cases, but if you just want to build a simple crud API, it's much easier to use Django / djrf, rails laravel, or Phoenix
exception handling: go language can help developers deal with compilation errors by simply returning errors (or call stack) through functions and expected calling codes. Although this method is effective, it is easy to lose the scope of the error, so it is difficult to provide meaningful error information to users. Error package can solve this problem by allowing us to add context and stack trace to return error
another problem is that we may forget to handle errors. Static analysis tools such as errcheck and megacheck can avoid these errors. Although these solutions are very effective, they may not be the right way.

2. At the top of Ethereum is DAPP. It exchanges with the smart contract layer through Web3. JS. All smart contracts run on EVM (Ethereum virtual machine) and use RPC calls. Below EVM and RPC are the four core contents of Ethereum, including: blockchain, consensus algorithm, mining and network layer. Except DAPP, all other parts are in the Ethereum client. The most popular Ethereum client is geth (go Ethereum)

3. Blockchain platform, do you want to see blockchain information? Here is Amway password finance, general chain circle, coin circle, DAPP and other information.

4. Do you want to learn blockchain development technology or just want to know what blockchain is? If it is the former, you can look at the code of other blockchain projects and learn about it first. If it is the latter, we can pay attention to some good blockchain we media. Blockchain is an emerging instry. There is no ready-made training course. It depends on self exploration and understanding.

5. If you look at an application running on Ethereum, the biggest headache now is that Ethereum is too congested. At present, MOOC MOAC can run to 1000 TPS on the bottom layer and 5000 TPS on the sub chain. At present, since MOOC MOAC has just started its main network, there are also some transactions coming up. They feel that it is too much more than Ethereum. From various angles of transfer, It runs smoothly. For traditional enterprises, it is divided into two parts. First, domestic enterprises still have a lot of arguments about currency and token, but they are very supportive of the chain. Some enterprises will be interviewed as soon as they encounter currency. Therefore, enterprises want to move the blockchain, but they will have policy considerations. However, there are still many talks about blockchain on a shares, and they say they want to build blockchain, There were several trading limits in the market, and the Securities Regulatory Commission immediately sent a letter to inquire, saying that we just did research by the Research Institute. Therefore, the idea of many of these enterprises is that how can MOAC step into the chain without money and put MOAC's business and business logic into it. If the policy is opened up in the future, it will take them a few minutes to reissue. Now it's called "coin free blockchain". The biggest problem is that R3 and IBM fabric are pushing this one fiercely. They're basically on the decline now, including fabric. Some people in R3 say that they want to issue coins. There's a problem of talents. If an enterprise says that I want to do coin free blockchain, you can't find talents to do it, Even if you have trained two or three talents, these people will run out as soon as they are tempted by issuing coins. However, MOAC can solve this problem. It can put the business on the chain in 5 minutes and 10 minutes without hitting the wall. Moreover, it can ensure his safety through MOAC's public chain, so the demand is still very large.

6. Blockchain learning is more about understanding the idea of decentralization and the value of decentralization. Language is the second thing
however, as Ethereum and hyperledger fabric have the best support for go language, go language must be learned
next, I'll give you the answer to another question, hoping to help you
Background: I started to study blockchain technology in 2015, so I have a certain understanding of blockchain
statement: it is estimated that everyone who sees this question wants to get started with blockchain, so this answer is mainly an introction at the entry level. It's just an introction at the entry level, which is not suitable for blockchain practitioners to improve their learning.

7. Many projects belong to the new infrastructure category. Just take the procts and solutions launched by lierda group as an example: (information communication, 5g and other infrastructure network construction) lierda lorawan solution has low power consumption, strong anti-interference, low cost and high capacity; Lilda NB IOT solution has wide signal coverage, strong penetration ability, ultra-low power consumption, ultra-high sensitivity, strong anti-interference and low cost Smart city, municipal pipe network) has a mature underground parking energy-saving lighting system to rece lighting costs, system rability and reliability, save maintenance costs, improve management efficiency Artificial intelligence) Intelligent Hotel solutions meet the personalized needs of customers and make the hotel management service more efficient and orderly

8.

Artificial leather and synthetic leather also have the following characteristics:

1. When pressing the leather surface with fingers, there are no obvious pores and wrinkles. If there are wrinkles after pressing, they will not disappear naturally

There are no pores on the leather surface, which is an important feature to distinguish the true and false leather

3. Cut off the corners and burn. It has a smell, but not the scorched smell of hair

9. Therefore, high traffic data center needs a powerful and flexible automation network to support virtualization, cloud computing and diversified multi-point network ecosystem. In addition, storage and LAN also need a predictable and high-performance network architecture. These conditions have prompted network service providers to develop new fabric Ethernet architecture to meet the new network requirements.

10. The front and back body should be lined with contrast cloth, and the sleeves should not be used

lined means lining. Unlined means no lining

contrast color self fabric refers to the color opposite to the body color. For example, the body is black and the lining is white. Of course, it depends on the arrangement on the process drawing

sometimes guests like to use contrast colors.