Job search of Ethereum
IELTS and TOEFL, as very professional language tests, are more and more recognized at home and abroad, so they may be of great help to your studies or future employment. However, many people will doubt that IELTS and TOEFL are only required for studying abroad? After all, the examination is not free... If you have got the results, but you don't go abroad to study because of all kinds of circumstances, will the examination fees be wasted? In fact, none of them are. Today, let's talk about the benefits of IELTS and TOEFL
Airlines
many airlines also have clear requirements for IELTS scores. For example, China Southern Airlines IELTS test requires 6.0
teacher
when your IELTS score reaches 7.5 or above, you will become a hot potato in the eyes of many ecational institutions
therefore, whether you choose to study abroad or not, you can get an IELTS or TOEFL score, which is of great help to your studies and future employment, so it's a two-hand preparation. However, it should be noted that IELTS and TOEFL are only valid for two years. We must arrange a good time to take the test again
go language is the second open source programming language released by Google in 2009
go language is specially optimized for the programming of multiprocessor system applications. The program compiled with go can be comparable to the speed of C or C + + code, and it is more secure and supports parallel processes. We can not only develop the web, but also develop the bottom layer. At present, we know that we can develop it with golang. The preferred languages of blockchain are go, Ethereum and super ledger, which are all based on go language, as well as btcd of go language version.
the goal of go is to improve the dependency management of existing programming languages, such as program libraries. These software elements will be repeatedly called by applications. Due to the existence of parallel programming mode, this language is also designed to solve multiprocessor tasks
Google has high hopes for go. Its design is to make the software give full play to the advantages of multi-core processor synchronous multitasking, and solve the trouble of object-oriented programming. It has modern programming language features, such as garbage collection, to help programmers deal with trivial but important memory management problems. Go is also very fast, almost as fast as C or C + + programs, and can make programs quickly
go's website is built with go, but Google has greater ambitions. The software is designed to build server software (such as Google's Gmail). Google believes that go can also be applied to other areas, including the execution of software in the browser, replacing the role of JavaScript
why should we learn go language? What are the advantages of go
1. What are the advantages of go
1: performance
2: language performance is very important
3: developer efficiency & don't be too innovative
4: concurrency & Channel
5: fast compile time
6: team building ability
7: powerful ecosystem
8: gofmt, Mandatory code format
9: grpc and protocol buffers
can be directly compiled into machine code, independent of other libraries. Glibc version has certain requirements, and deployment is completed by throwing a file
static type language has the feeling of dynamic language. Static type language can check out most hidden problems when compiling, while dynamic language has the feeling that there are many packages that can be used and the efficiency of writing is very high
the language level supports concurrency, which is the biggest feature of go. Naturally, it supports concurrency. I once said that there is a difference between natural genes and plastic surgery. Everyone is as beautiful, but do you like plastic surgery or natural gene beauty? Go is the concurrency supported by 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, if the go code you write does not contain CGO, then you can compile Linux applications in Windows system. How can you do that? Go refers to the code of plan9, which is system independent information
embedded C support. As mentioned earlier, the author is the author of C, so go can also directly include C code, making use of the existing rich C library
2. What is go suitable for
server programming? In the past, if you used C or C + + to do those things, go is very suitable, such as processing logs, data packaging, virtual machine processing, file system, etc<
distributed system, database agent, etc.
network programming is currently the most widely used, including web application, API Application, download application,
memory database, groupcache developed by Google some time ago, part of couchbase
cloud platform. At present, many foreign cloud platforms are developed by go, part of cloudfoundation, The former technical director of vmare came out to build apcera cloud platform< 3. Go's successful project
NSQ: bitly open source message queuing system has very high performance. At present, it processes billions of messages every day
docker: a virtual packaging tool based on LxC, which can realize the construction of PAAS platform
packer: used to generate image files of different platforms, such as VM, VBox, AWS, etc., written by vagrant
Skynet: distributed scheling framework
DOOZER: distributed synchronization tool, similar to zookeeper
Heka: mazila open source log processing system
CBFS: couchbase open source distributed file system
Tsuru: open source PAAS platform, SAE
groupcache:memcahe system. The
god: redis system is used for Google downloading system, but it supports distributed and extensible
gor: network traffic capture and replay tools
the import package of go doesn't support version, sometimes the project can't run e to upgrade, so I need to control the corresponding version information by myself.
once the goroutine of go is started, the switching between different goroutines is not controlled by the program, while the runtime is scheled, Strict logic is required. Otherwise, goroutine will sleep, the logic will end after a period of time, and it will suddenly appear and execute again, which will lead to logic errors
GC is a bit delayed, I developed a log system suck once, and concurrent large cases, processing large logs, GC is not so fast, memory recovery is not strong, and later improved after profile program improvement.
there are many bugs in the image processing library under PKG, so it's better to use mature procts. It's more reliable to call the interface of these mature libraries imagemagic
finally, I suggest you learn go, which is really worth learning, because it can do anything from the bottom to the front.
first of all: what kind of life do you want---- How much money is needed for such a life--- How to get the money---- And then what's your instry---- What's the role in this instry---- What skills and knowledge does this role need---- What are you short of now----- What are you going to do---- How long do you give yourself----- Start from the most favorable direction and take action
secondly, it's not too late to change jobs, but you have to figure out what you want and how you do it
finally, how many people are engaged in their favorite instries in life? very seldom. But they also do well and are happy. No matter what you do, let yourself be positive. Don't always complain. Complaining means that you haven't done enough. It's time for you to do well. Even if it's not your favorite career, you will also have a great sense of achievement and happiness. You need to be confident, optimistic and give yourself a sense of accomplishment.
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PS.
it's reliable to go to work in China Ping An, which is a big company with guarantee
No.29 in Fortune Global 500 in 2019; In 2019, Forbes ranked 7th in the global top 2000, 3 places higher than that in 2018. Ranked first in the global diversified insurance companies, ranked fifth among China's many shortlisted companies, and ranked sixth among global financial companies According to brandz's top 100 most valuable global brands in 2019, Ping An of China ranks 40th
extended materials:
Ping An aims to create a logo integrating traditional Chinese culture and modern brand concept. The logo design adopts the philosophy of "round outside and square inside" in traditional Chinese culture, combined with the bright and concise international brand design trend, which has both traditional characteristics and modern fashion style
The equilateral triangle shape ofA is reminiscent of all kinds of cabins in China and the west, implying the image of care, love and home. The green in the green square symbolizes life, vitality and vigor. The image of the square fits the family, and also coincides with the traditional Chinese "kongfang" coin shape. It has the symbol of wealth and treasure. It's a feeling of peace of mind to keep life, wealth and treasures at home. It's a feeling of peace of mind to be at home
