golang introduction

There are two ways to initialize a struct in **golang: 1. Declare the key of all fields, 2. Neither declares key, but value corresponds to the order one by one defined. Although mode 1 is cumbersome, anonymous fields may not have to be initialized when there is an anonymous field in the defined struct, and the anonymous field needs to be initialized in mode 2, otherwise the compiler will error (too few values in struct initializer)."Subclass" in

# #Golang unittest Unit Test Golang unit tests have strict requirements on file names and method names, and parameters. For example: 1, the file name must be named Xx_test.go 2, the method must be test[^a-z] Start 3, the method parameter must t *testing. T Before because the 2nd did not write right, led to find a half-day error. Now really memorable, ah, little things were not carefully read. Let's share

coverage testing in the Golang Golang provides a number of tool chains that can be used to facilitate unit testing, analyze performance bottlenecks, provide runtime information, and so on, all of which are useful. Go test This tool people should use more, I used to do mostly for unit testing, go to do unit testing is very convenient, but I ignored the coverage test. How much code does the unit test cover?

solving the problem of sticky packets in TCP transmission in Golang Author: Yu DongweiEmail:usher.yue@gmail.com What is a sticky bag. Recently in writing https://github.com/UsherYue/ActivedRouter (a HTTP/HTTPS reverse proxy service) encountered a sticky packet problem, If there is a network programming of the small partners should be aware of the sticky packet problem, for example: the client in the kimono Use JSON-formatted packets for communicatio

Recently, we've been working on Docker and Kubernetes, both in the go language, in order to get a deeper understanding of Docker and kubernetes, and to learn about the go language.In order to learn in detail, a directory is listed here, will be constantly updated Golang Study notes-Environment Building Guide (this article) Golang Study notes-ide selection and Installation GuideContinue to update,

1. Download Protobuf compiler Protoc Address: HTTPS://github.com/google/protobuf/releases Window Download: Protoc-3.3.0-win32.zipUnzip, copy the Protoc.exe under the bin directory to Gopath/bin, Gopath/bin add the environment variable.Of course can be placed in other directories, need to add environment variables, can let the system find Protoc.exeLinux:Download: Protoc-3.3.0-linux-x86_64.zip or Protoc-3.3.0-linux-x86_32.zipUnzip, copy the Protoc under the bin directory to Gopath/bin, Gopath/bin

As a low-level technology, blockchain technology from the initial digital money to smart contracts to the current industry scenarios distributed application implementation, since 2008, 10 years ago, the blockchain from the original theoretical concept to today's actual scenario application landed, although questioned but have been hard to move forward. Especially in the last two years, the re-construction of the existing industry logic in blockchain has made it undisputed the next development of

Tags: turn database query host UID for TCP user return UTF8Just beginning to contact Golang, just write down a few methods, the principle is not very clear, temporarily just can achieve the point, essay points 1. Database connection var { = "" = "" = "" = ""}//Return DB connection func dbopen () (Db_obj *sql. DB, err error) { db_obj, Err_open: = sql. Open ("MySQL", dbhostuser+ ":" +dbhostpassword+ "@tcp (" +dbhostip+ ":"

This is a creation in Article, where the information may have evolved or changed. Why do you write this program? Find time Synchronization API Writing a synchronization program Encapsulated as a Windows service Why do you write this program?has been concerned about the Golang, from the April 2011 configuration environment wrote a Hello world! (Http://weibo.com/1409046677/wr4n3vdYFV), and then did not write

/protobuf-3.6.1$ protoc --versionprotoc: error while loading shared libraries: libprotoc.so.17: cannot open shared object file: No such file or directory解决方案：执行：export LD_LIBRARY_PATH=/usr/local/libbjlvxin:~/下载/protobuf-3.6.1$ export LD_LIBRARY_PATH=/usr/local/lib/ bjlvxin:~/下载/protobuf-3.6.1$ protoc --versionlibprotoc 3.6.1 2. Obtain the PROTOBUF plug-in protoc-gen-go provided by GOPROTOBUF (placed under $GOPATH/bin, $GOPATH/bin should be added to the PATH environment variable so PROTOC can

Why fully recommend Golang Turn from: https://zhuanlan.zhihu.com/p/19959647 Discussing which language is better is like arguing about Yao Ming and Liu Xiang who are better athletes. Because their coordinate quadrants are different, they often fall into a difficult-to-conclude circle. So this article is by no means saying that Golang is a better language than other languages.

This is a creation in Article, where the information may have evolved or changed. The text of this text connection is: http://blog.csdn.net/freewebsys/article/details/53635529 not allowed to reprint without the Bo master.Bo main address is: Http://blog.csdn.net/freewebsys 1, about alpine environment http://blog.csdn.net/freewebsys/article/details/53615757The HTTP server for the next Golang was studied yesterday.Found an error when booting: fileord

This is a creation in Article, where the information may have evolved or changed. 1, about alpine environment The HTTP server for the next Golang was studied yesterday. Found an error when booting: No such file or directory New Wisdom Cloud www.enncloud.cn found this error, began to think is Alpine system Lib library less, You must use the official Docker Golang image. Later the study understood that it

CGO makes it possible to use C code in Golang. Hello World To have a more intuitive understanding, let's look at a simple example of creating a file Main.go: Copy Code code as follows: Package Main /* #include void Sayhi () { printf ("Hi"); } */ Import "C" Func Main () { C.sayhi () } Execution procedure: Copy Code code as follows: Go Run main.go The program executes and outputs

Golang compiler installation and configuration Golang currently has two compilations, one for Golang and the other for GNU Gccgo; Golang official compiler installation and configuration Install the GCC tool, because golang some of the features are written in C, so buil

This is a creation in Article, where the information may have evolved or changed. wget https://github.com/google/protobuf/releases/download/v2.6.1/protobuf-2.6.1.tar.gzTar zxvf protobuf-2.6.1.tar.gzcd protobuf-2.6.1./configuremakemake Installprotoc-h Go get github.com/golang/protobuf/protoc-gen-gocd Github.com/golang/protobuf/protoc-gen-gogo buildgo installvi/etc/ Profile add $gopath/bin to the environment

This is a creation in Article, where the information may have evolved or changed. The third type of opening language is a bit negative, so it is not posted here. Interested in themselves can go to see https://andy-zhangtao.gitbooks.io/golang/content/. Anger and anger. After reading it, don't take it seriously. Just take the following things seriously. Don't look at the content, just look at the title and thought it was a novel. If one day on the whim,

This is a creation in Article, where the information may have evolved or changed. Working directory First of all, the Golang working directory, after the installation of Golang, one thing to do is to set up a working directory, all projects, tools, third-party packages will be stored in the working directory. By default, the working directory is the folder for the user directory go . We can use environment

actual project ~ Author: Asta Xie Links: http://www.zhihu.com/question/23486344/answer/24770195 Source: Know Copyright belongs to the author, please contact the author for authorization. I think learning a language is the most important thing is to do three, first look at the basic knowledge, the second study copy code, the third study write code 1th, many people feel that come up to write, but your basic things are not mastered, how to write it? Make haste, so the basic things must be master

This is a creation in Article, where the information may have evolved or changed. Preface Golang Follow the design philosophy of "less is more" while supporting closures (Closure), then closures are certainly of great value to Golang. For Golang beginners, there will be a few questions: What is a closure? How are closures generated? What problems can