如何在 Golang 中初始化嵌套列表？

Question

我有一个这样的嵌套结构：

type Project struct {               
    FolderStructure     []FolderItem 
    Description         string
}

type FolderItem struct {
    SubFolderStructure  []SubFolderItem
    Description         string
}

type SubFolderItem struct {
    SubSubFolderStructure []SubSubFolderItem
    Description           string
}

type SubSubFolderItem struct {
    Content               string
    Description           string
}

不知如何初始化，否则invalid memory address or nil pointer dereference会被抛出。提前致谢！

Answer 1

最简单的初始化方法是创建多个实例作为变量，然后重新使用它们将值分配给嵌套结构。

下面是工作示例：https://go.dev/play/p/6p3VFljyqom 下同，这只是一种实现方式，感觉是最简单的。

package main

import "fmt"

type Project struct {
    FolderStructure []FolderItem
    Description     string
}

type FolderItem struct {
    SubFolderStructure []SubFolderItem
    Description        string
}

type SubFolderItem struct {
    SubSubFolderStructure []SubSubFolderItem
    Description           string
}

type SubSubFolderItem struct {
    Content     string
    Description string
}

func main() {
    ssfi1 := SubSubFolderItem{
        "content1",
        "description1 - SubSubFolderItem",
    }
    ssfi2 := SubSubFolderItem{
        "content2",
        "description2 - SubSubFolderItem",
    }
    sfi := SubFolderItem{
        SubSubFolderStructure: []SubSubFolderItem{ssfi1, ssfi2},
        Description:           "description 1 - SubFolderItem",
    }
    fi := FolderItem{
        SubFolderStructure: []SubFolderItem{sfi, sfi},
        Description:        "description 1 - FolderItem",
    }
    p := Project{
        FolderStructure: []FolderItem{fi, fi},
        Description:     "description 1 - Project",
    }

    fmt.Println(ssfi1)
    fmt.Println(ssfi2)
    fmt.Println(sfi)
    fmt.Println(fi)
    fmt.Println(p)
}

如何在 Golang 中初始化嵌套列表？

How to initalize a nested list in Golang?

go