Programmer Group

The interface defines the behavior specification of an object. The interface only defines that the specification is not implemented, and the specific object implements the details of the specification. 1.1 interface type In Go language, interface is a type, an abstract type. interface is a set of method s, which is an embodiment of duck type p ...

What language does blockchain development use? Through this article, you will use go language to develop your own blockchain (or build blockchain with go language), understand how hash function keeps the integrity of blockchain, master how to create and add new blocks with go language programming, realize multiple nodes to generate blocks th ...

Catalog   1, Standard library 1. regexp package: regular expression 2. sync package: lock and sync 2.1 sync.Mutex mutex 2.2 sync.RWMutex read / write lock 2.3 once.Do(call) 2, Use of packages 1. Custom package 2. reference package 3. Initialization of package 1, Standard library Built i ...

Why do we need package management Python has pip, Nodejs has npm.Is there a package management tool in other languages, so go needs it?Of course not, let's look at the following code: import ( "github.com/TomatoMr/something" ) This is how go references packages, which is obviously a third-party package, so how exactly is it found on our m ...

The program control of go is roughly divided into three if for case statements 1. if loop There can be any number of else if between if else statements.The order of condition judgment is from top to bottom. If the if or else if condition determines that the result is true, the corresponding code block is executed. If no condition is true, the ...

Catalog 1, What is JWT 2, JWT Standard Specification 3, Analysis of core code 4, Login authorization example 5, JWT usage 6, JWT considerations 1, What is JWT JSON Web Token (JWT) is the most popular cross domain authentication solution. In short, OAuth is a kind of authoriz ...

background When printing in go language, we often see different printing methods, such as println, fmt.Println and fmt.Printf Differences and usage Source code of fmt.Println // Println formats using the default formats for its operands and writes to standard output. // Spaces are always added between operands and a newline is appended. ...

1 slice initialization 1 func printSlice(s []int) { 2 fmt.Printf("len=%d cap=%d underlying array:%p, %v\n", len(s), cap(s), s, s) 3 } 4 5 func sliceInit() { 6 7 var s1 []int //Declare s1, and it is not initialized. At this time, s1 is nil slice, and the underlying array is not allocated 8 if s1 == nil { 9 fmt.P ...

Recently, I learned to use Go language to operate MySQL database to add, delete, modify and query user data when I was doing the registration and login service. Now I summarize my personal learning experience as follows, and attach Code warehouse address Welcome to fork. Software environment: Goland, Navicat for MySQL. 1, Realization ideas 1 ...

Section Slice is a variable-length sequence of elements of the same type.It is a layer of encapsulation based on the type of array.Support automatic expansion Slice is a reference type The internal structure of the slice contains address, length, and capacity var name []T func main() { var a []string // Declare a String Slice ...