stringset.go

type Set struct {
    set map[string]bool
}

func NewSet() *Set {
    return &Set{make(map[string]bool)}
}

func (set *Set) Add(s string) bool {
    _, found := set.set[s]
    set.set[s] = true
    return !found   //False if it existed already
}

func (set *Set) Get(s string) bool {
    _, found := set.set[s]
    return found    //true if it existed already
}

func (set *Set) Remove(s string) {
    delete(set.set, s)
}

func (set *Set) Keys() (out []string) {
    for k, _ := range set.set {
        out = append(out, k)
    }
    return
}