In Go, functions can be passed as parameters to enhance code reusability and maintainability. Syntax: Pass the value of function type, that is, func (parameter list) return value type. Practical case: The function Exclaim takes a string as a parameter, prints the string and adds an exclamation mark. The function PrintWithExcitement receives a function parameter f and uses it to print the string parameter s.
In Go, you can pass a function as a parameter to another function. This allows the creation of reusable and modular code, thereby enhancing code readability and maintainability.
To pass a function as a parameter, simply pass it as a value of the function type. The syntax for function types is as follows:
func(参数列表) 返回值类型
For example, consider the following function, which receives a function as a parameter and uses it to print a message:
func PrintMessage(f func(string)) { f("Hello, world!") }
Here is a Practical case showing how to create a function and pass it as a parameter to another function:
package main import "fmt" // 定义一个函数并将其作为参数传递 func Exclaim(s string) { fmt.Println(s + "!") } // 定义一个函数,它接收一个函数作为参数 func PrintWithExcitement(s string, f func(string)) { f(s) } func main() { // 传递 Exclaim 函数作为参数 PrintWithExcitement("Hello", Exclaim) }
Running the above code will output:
Hello!
This code shows how to define a functionExclaim
and pass it as a parameter to function PrintWithExcitement
. Then, PrintWithExcitement
calls the Exclaim
function to print the message "Hello!" followed by an exclamation mark.
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