附加到指针切片

type list struct {
    taxonomies []taxonomy
}

func (l *list) add(t taxonomy) {
    var exists bool
    var existing *taxonomy
    for _, taxonomy := range l.taxonomies {
        if taxonomy.name == t.name {
            exists = true
            existing = &taxonomy
        }
    }
    if exists {
        for _, term := range t.data {
            termexists := false
            for _, existingterm := range existing.data {
                if existingterm.name == term.name {
                    termexists = true
                    break
                }
            }
            if termexists {
                continue
            }
            (*existing).data = append((*existing).data, term)
        }
    } else {
        l.taxonomies = append(l.taxonomies, t)
    }
}

type taxonomy struct {
    name string
    data []term
}

type term struct {
    name, link string
}

(*existing).Data = append((*existing).Data, term)

for i := range l.taxonomies {
    if l.taxonomies[i].name == t.name {
        exists = true
        existing = &l.taxonomies[i]
    }
}

type List struct {
    Taxonomies []*Taxonomy
}

func (l *List) Add(t *Taxonomy) {
...