英文:
Index out of range [1] with length 0
问题
我正在使用Go语言编写一个小型MUD游戏，并尝试从文件中读取一系列带有出口的房间。
我期望代码能够遍历文件的每一行，将索引为1的行填充到房间ID中，将索引为2的行填充到房间描述中，将索引为3的行填充到房间的链接中。然而，当我运行代码时，出现了一个错误：panic: runtime error: index out of range [1] with length 0。我已经思考了两天，但没有找到解决办法，希望能得到帮助。
编辑：我尝试使用r:= []*Room{}来初始化r，但仍然遇到相同的错误。
func roomsInit() ([]*Room, error) {
r := []*Room{}
roomdoc, err := readLines("/usr/go/src/gopherit/GopherIT/roomdoc.txt")
if err != nil {
return r, err
}
i := 0
index := 1
for _, str := range roomdoc {
if i == 0 {
r[index].roomInitId(str)
i++
}
if i == 1 {
r[index].roomInitDesc(str)
i++
}
if i == 2 {
vri := strings.Split(str, ":")
v, ri := vri[0], vri[1]
r[index].addLink(v, ri)
i++
}
if i == 3 {
index++
i = 0
}
}
return r, err
}
英文:
I'm working ona little MUD in Go, and I'm trying to read a list of rooms with exits from a file.
I expect the code to iterate through the lines of the file, filing every line with the index 1 to the room ID, every line with the index 2 to the room Description and every line wit the index 3 to be used to fill in the room's links. However when I run the code, i get a panic: runtime error: indext out of range[1] with length 0. I've been mulling over this for two days with no luck, any help would be mucho appreciado.
Edit: tried initializing r with r:= []*Room{} but am still getting the same error.
r:= []*Room{}
roomdoc, err := readLines("/usr/go/src/gopherit/GopherIT/roomdoc.txt")
if err != nil {
return r, err
}
i := 0
index := 1
for _, str := range roomdoc {
if i == 0 {
r[index].roomInitId(str)
i++
}
if i == 1 {
r[index].roomInitDesc(str)
i++
}
if i == 2 {
vri := strings.Split(str, ":")
v, ri := vri[0], vri[1]
r[index].addLink(v, ri)
i++
}
if i == 3 {
index++
i = 0
}
}
return r, err
}
</details>
# 答案1
**得分**: 0
你正在做的是"嘿，创建一个名为r的变量，它是Room结构体指针的切片"，即r:= []*Room{}，然后在for循环中使用它，基本上是试图访问在该上下文中不存在的内存位置。
所以你需要将元素追加到该切片中，像这样：```r = append(r, &Room{})```
<details>
<summary>英文:</summary>
What are you doing is "Hey go make a variable r that is a slice of pointers from the Room Struct" r:= []*Room{}" and then using on the For, so is basic trying to access a position in memory that doesn't exist in that context.
So you need to append into that slice, like ``` r = append(r,&Room{})```
</details>
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