从字符串列表初始化结构

Question

I'm trying to initialize structs from a list of strings, but the compiler is throwing the following error. I'm still learning the language so excuse my ignorance, but is this solved by utilizing type assertion?

ERROR: v.UberX undefined (type string has no field method UberX)

type Galaxy struct {
    UberX     int64
    UberY     int64
}

func main() {
    galaxies := []string{"andromeda", "milkyway", "maffei"}
    for _, v := range galaxies {
        v := &Galaxy{}
    }
    for _, v := range galaxies {
        v.UberX += 1000
        v.UberY += 750
    }
}

Answer 1

Your Galaxy struct doesn't even store the name, in your attempt there isn't any connection between the names and the struct values. Add the name to the struct:

type Galaxy struct {
    Name  string
    UberX int64
    UberY int64
}

Next, in your first loop you create a *Galaxy value, but you only store it in a local variable v which by the way shadows the loop variable v:

for _, v := range galaxies {
    v := &Galaxy{}
}

You need a slice of Galaxy or a slice of *Galaxy which you can populate:

gs := make([]*Galaxy, len(galaxies))

Then 1 loop is enough to loop over the galaxy names and populate the gs slice:

for i, v := range galaxies {
    gs[i] = &Galaxy{
        Name:  v,
        UberX: 1000,
        UberY: 750,
    }
}

Verifying the result:

for _, v := range gs {
    fmt.Printf("%+v
", v)
}

Output (try it on the Go Playground):

&{Name:andromeda UberX:1000 UberY:750}
&{Name:milkyway UberX:1000 UberY:750}
&{Name:maffei UberX:1000 UberY:750}

Recommended to go through the Golang Tour first to learn the basics.