英文:
Passing for loop values as function parameters
问题
它说:(no value)被用作值,但我正在将循环值从切片传递给它!
package main
import "fmt"
func greet(n string) {
fmt.Printf("Hi, %v\n", n)
}
func cycle(n []string, f func(string)) {
for i := 0; i < len(n); i++ {
fmt.Println(f(n[i]))
}
}
func main() {
cycle([]string{"John", "Marie"}, greet)
}
英文:
It says: (no value) used as value, but I'm passing loop values from a slice to it!
package main
import "fmt"
func greet(n string) {
fmt.Printf("Hi, %v\n", n)
}
func cycle(n []string, f func(string)) {
for i := 0; i < len(n); i++ {
fmt.Println(f(n[i]))
}
}
func main() {
cycle([]string{"John", "Marie"}, greet)
}
答案1
得分: 2
我找到了解决方案:我应该直接调用函数,而不是在Println()内部调用。
package main
import "fmt"
func greet(n string) {
fmt.Printf("Hi, %v\n", n)
}
func cycle(n []string, f func(string)) {
for i := 0; i < len(n); i++ {
f(n[i])
}
}
func main() {
cycle([]string{"John", "Marie"}, greet)
}
英文:
I found the solution: I should have called the function directly, not inside Println().
package main
import "fmt"
func greet(n string) {
fmt.Printf("Hi, %v\n", n)
}
func cycle(n []string, f func(string)) {
for i := 0; i < len(n); i++ {
f(n[i])
}
}
func main() {
cycle([]string{"John", "Marie"}, greet)
}
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库,让每个人都能够通过互相帮助和分享经验来进步。
评论