Programmer Group

Mutex Critical zone In concurrent programming, if a part of the program is accessed or modified concurrently, to avoid unexpected results caused by concurrent access, this part of the program needs to be protected. The protected part of the program is called the critical zone. A critical zone can be a shared resource or an entire set o ...

Correlation constant parsing bucketCntBits = 3 // It represents bit bucketCnt = 1 << bucketCntBits // Represents a bucket(bmap) with a maximum storage of 8 key s loadFactorNum = 13 loadFactorDen = 2 // The load factor is calculated from these two factors (the load factor is related to when to trigger capacity expansion) maxKeySize ...

brief introduction json (JavaScript object notation) is a data exchange format, which is commonly used for front and rear data transmission. Either end converts the data into a json string, and the other end parses the string into a corresponding data structure, such as string type, strcut object, etc. go language itself provides us with json ...

What problem does DDD solve / why use DDD You can write your answers in the comments area DDD overall process (source: ThoughtWorks) v1 v2 The biggest difference is that the event storm in the first step is replaced by the identification core domain of strategic design. Personally, I don't think it's suitable to discuss ...

Go common functions Official website: https://golang.org/pkg/ golang official website 1, strings handles string related Statistics string length, in bytes len(str) String traversal,Processing Chinese r:=[]rune(str) String to integer n, err := strconv.Atoi("12") Integer to ...

preface Performance is a very important indicator when optimizing code or determining algorithm selection. For example, I need to use hash algorithm for signature when making requirements recently. At first, I wanted to use md5 without thinking about it, and then a few big words popped up on the IDE: md5 has known security problems, so it is r ...

Slice of Go language foundation Because the length of the array is fixed and the length of the array is part of the type, the array has many limitations, such as summing the parts of the array. package main import "fmt" func arraySum(x [3]int) int { var sum int for _, v := range x { sum += v } return sum } func main ...

Microservice library user service, user management service. It provides a Restful interface for user management, which mainly realizes the functions of user registration, querying users according to user ID or email, querying books borrowed by users, etc. Full code: https://github.com/Justin02180218/micro-kit Package structure descriptio ...

Reprint   https://www.jianshu.com/p/63e3d57f285f In golang, defer, panic and recover are three common features. When used together, they can act as try... catch... In other languages, and defer itself is like a destructor in other languages defer A function will be followed by defer, but the function will not be executed immediately. In ...

package main import ( "fmt" "time" ) type Timer struct { Interval int // set time interval Tick func() // When the time is up, which program will be called? } func (t Timer) Enabled() chan bool { channel := make(chan bool) // Create a channel ticker := time.NewTicker(time.Duration(t.Interval) * time.Millisecond) // A ti ...