golang function anonymous function parameter passing

In the Go language, anonymous functions can be passed as parameters to other functions to achieve the function of passing anonymous functions. The syntax is: funcName(func(params) return_type). The anonymous function type must be consistent with the function parameter type, and its domain variables must be accessible.

Function anonymous function parameter passing in Go language

Anonymous function is a function without a name. They are often used as arguments or closures to other functions. In Go language, anonymous functions can be passed as parameters to other functions.

Syntax

The syntax for passing anonymous functions as parameters is as follows:

funcName(func(params) return_type)

where funcName is the function to be called , func(params) is an anonymous function, params is the parameter of the anonymous function, return_type is the return value type of the anonymous function.

Practical case

The following is a practical case using anonymous functions as parameters:

package main

import "fmt"

func main() {
    // 定义一个接收匿名函数作为参数的函数
    myFunc := func(f func(int) int) {
        fmt.Println(f(10))
    }

    // 定义一个匿名函数并将它作为参数传递给 myFunc
    myFunc(func(i int) int {
        return i * 2
    })
}

In this example, myFunc The function receives an anonymous function as a parameter, which takes an integer as a parameter and returns an integer. We then define an anonymous function and pass it as a parameter to myFunc. The anonymous function multiplies the integer 10 by 2 and prints the result as 20.

Note

• The type of the anonymous function must match the type of the function parameter.
• Anonymous functions can access variables in the scope in which they are defined.
• Anonymous functions can be used as expressions or passed as parameters of other functions.

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