Tag：Go language
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Time：2021-10-17
preface Go moudules is a package management tool of go. It is officially provided and reliable. The minimum go version requires 1.11 +. It can be understood as Python virtual environment, Java Maven and PHP composer. Its essence is to solve the problem of package management confusion. Anyway, it’s done with it. There are only […]
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Time：2021-10-14
Case 1: In go language, if a new go process is created in the sub go process, the sub go process will be released (destroyed), and the newly created go process will not be destroyed with the destruction of the sub go process. reason: The go process shares the heap and does not share the […]
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Time：2021-10-11
I’ll stop talking nonsense. Let’s look at the code directly~ package main import ( “fmt” “reflect” “testing” ) type Call struct { Num1 int Num2 int } func (call Call) GetSub(name string){ FMT. Printf (“% v completed subtraction,% v -% v =% v \ n”, name, call.num1, call.num2, call.num1 – call.num2) } func (call *Call) […]
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Time：2021-10-10
Foregoing The relationship between go language and Golan is like that between Java and idea, Python and python. Therefore, we need to install go language before installing Golan.Its installation is similar to that of Java and python。 1、 Go language installation and download. Go language download address:Go […]
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Time：2021-10-5
deadlock Four conditions of deadlock Inalienable The resources obtained by a thread cannot be deprived by other threads before they are used up. They can only be released after they are used up. Request hold Thread T1 keeps one resource R1 occupied, but makes another resource R2 request. At this time, resource R2 is occupied […]
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Time：2021-9-25
What can sync.cond be used for? Cond in golang’s sync package implements a condition variable that can use multiple readers to wait for public resources. Each cond is associated with a lock. When modifying a condition or calling the wait method, it must be locked to protect the condition. It is similar to wait and […]
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Time：2021-9-18
Gopath and goroot Unlike other languages, there is no project in go, only packages. There are two important paths: goroot and gopath. Goroot is the installation directory, and gopath is the directory used to store packages in our workspace Multiple gopaths can be set. The first one will be the default package directory. Packages downloaded […]
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Time：2021-9-4
Fallthrough: by default, the switch in go is equivalent to a break at the end of each case. After successful matching, it will not automatically execute other cases downward, but jump out of the whole switch. However, you can use fallthrough to enforce the subsequent case code. Example program 1: switch { case false: fmt.Println(“The […]
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Time：2021-8-23
RSA is an asymmetric encryption algorithm. Its name is composed of the initials of the last names of its three developers, namely Ron Rivest, adishamir and Leonard Adleman (Rivest Shamir Adleman), which can be used for data encryption and digital signature. When used for data encryption, the message sender encrypts with the other party’s public […]
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Time：2021-8-22
Example code: package main import ( “fmt” “path” ) func main() { filename := “device/sdk/CMakeLists.txt” filenameall := path.Base(filename) filesuffix := path.Ext(filename) fileprefix := filenameall[0:len(filenameall) – len(filesuffix)] //fileprefix, err := strings.TrimSuffix(filenameall, filesuffix) fmt.Println(“file name:”, filenameall) fmt.Println(“file prefix:”, fileprefix) fmt.Println(“file suffix:”, filesuffix) } Execution results: file name: CMakeLists.txt file prefix: CMakeLists file suffix: .txt path.Base(filename) Gets the […]
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Time：2021-8-16
In go language, iota is special. It is a constant modified by the compiler. It is reset to 0 when each const keyword appears. Then, before the next const appears, the number represented by iota will automatically increase by 1 The shift left operator “< <” is a binocular operator Shifting n bits to the […]
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Time：2021-8-15
iniconf The blogger was writing a small go language project two days ago. He wanted to find a third-party library to read ini format and configuration. After looking around the Internet, he felt it was not very easy to use. It was very strange to use, so he wrote a version himself. There were two […]
