How to implement function composition in Golang?

Function composition can be implemented in Golang by creating a higher-order function that accepts one or more functions as parameters and returns a function. For example, we can create a function combination ToUpperAndAddPrefix that converts a string to uppercase and adds a prefix.

Implementing function composition in Golang

Function composition is an effective technique that can simplify code and improve code reusability sex. In Golang, function composition can be achieved by creating a higher-order function that accepts one or more functions as arguments and returns a function.

Practical case: Convert a string to uppercase

Suppose we have a function ToUpper, which is used to convert a string to uppercase. We can use function composition to create a new function that converts the specified string to uppercase and adds a prefix.

import "strings"

// ToUpper 转换字符串为大写
func ToUpper(s string) string {
    return strings.ToUpper(s)
}

// AddPrefix 添加前缀到字符串
func AddPrefix(prefix, s string) string {
    return prefix + s
}

// Compose 函数组合两个函数
func Compose(f, g func(string) string) func(string) string {
    return func(s string) string {
        return g(f(s))
    }
}

func main() {

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