英文:
How to load method for struct in Array in Golang
问题
你好，现在我正在尝试将Java代码转换为Go代码。
但是我在使用为结构声明的方法时遇到了问题。
在将结构放入数组之前，方法可以被加载和使用。
但是在将其放入数组后，我无法调用它的方法。
你能检查一下下面的代码吗？
结果告诉我dvdCollection.DVD未定义（类型[15]*DVD没有字段或方法DVD）。
type DVD struct {
name string
releaseYear int
director string
}
func (d *DVD) AddDVD(name string, releaseYear int, director string) {
d.name = name
d.releaseYear = releaseYear
d.director = director
}
func main() {
dvdCollection := [15]DVD{}
dvdCollection.AddDVD("Terminator1", 1984, "James Cameron")
}
英文:
Hello Now I am trying to convert Java to Go.
But I have problem with using method declared for structure.
Before put structure in Array, Method could be loaded and used.
After put it in array, I cannot call method for it.
Can you check below codes?
Result said me that dvdCollection.DVD undefined (type [15]*DVD has no field or method DVD)
type DVD struct {
name string
releaseYear int
director string
}
func (d *DVD) AddDVD(name string, releaseYear int, director string) {
d.name = name
d.releaseYear = releaseYear
d.director = director
}
func main() {
dvdCollection := [15]DVD{}
dvdCollection.AddDVD("Terminator1", 1984, "James Cameron")
}
答案1
得分: 0
dvdCollection 是一个数组类型的值 ([15]DVD)。AddDVD() 方法是在 DVD 类型上定义的（更具体地说是 *DVD）。你只能在 *DVD 值上调用 AddDVD() 方法。
例如：
dvdCollection[0].AddDVD("Terminator1", 1984, "James Cameron")
// 这意味着 (&dvdCollection[0]).AddDVD("Terminator1", 1984, "James Cameron")
fmt.Println(dvdCollection[0])
这将输出（在 Go Playground 上尝试一下）：
{Terminator1 1984 James Cameron}
还要注意，你正在使用一个 数组 ([15]DVD)。在 Go 中很少使用数组，你可能更想使用一个 切片。有关介绍和详细信息，请参阅博文：Arrays, slices (and strings): The mechanics of 'append'。
英文:
dvdCollection is a value of an array type ([15]DVD). The AddDVD() method is defined on the DVD type (more specifically *DVD). You can only call AddDVD() on a *DVD value.
For example:
dvdCollection[0].AddDVD("Terminator1", 1984, "James Cameron")
// which means (&dvdCollection[0]).AddDVD("Terminator1", 1984, "James Cameron")
fmt.Println(dvdCollection[0])
This will output (try it on the Go Playground):
{Terminator1 1984 James Cameron}
Also note that you are using an array ([15]DVD). It's rare to use an array in Go, you should likely want to use a slice. For an introduction and details, see blog post: Arrays, slices (and strings): The mechanics of 'append'
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