将值分配给字符串取消引用运算符

Question

I'm new to go, pardon me if this is a regular question, How does the assignment to a string dereference operator works below?

package main    

import "fmt"

func main() {
    course := "Docker Deep Dive"
    changeCourse(&course)
}

func changeCourse(course *string) {
    fmt.Println(course) // prints the memory address of course since it is a pointer
    fmt.Println(*course) // prints the value since * is dereferenceing the pointer

   // Issue
    *course = "Docker Extended" // *course is a string, how does the assignment works here.
    fmt.Println(*course) // prints "Docker Extended"
}

Answer 1

* (also know as indirection operator) is used to “dereference” pointer variables, dereferencing a pointer gives us access to the value the pointer points to.
In this case: *course = "Docker Extended" basically you are saying to the compiler: store the string "Docker Extended" in the memory location course refers to.