ArrayList

array_list.go

package main

type (
    ListKey string
    ListVal interface{}
)

type ArrayList struct {
     list map[ListKey]ListVal
}

func NewArrayList() *ArrayList {
     return &ArrayList{make(map[ListKey]ListVal)}
}

func (a *ArrayList) Set(k ListKey, v ListVal) {
    a.Clear()
    a.Add(k, v)
}

func (a *ArrayList) Add(k ListKey, v ListVal) {
    a.list[k] = v
}

func (a *ArrayList) Get(k ListKey) ListVal {
     if a.Has(k) {
          return a.list[k]
     }
     return nil
}

func (a *ArrayList) Del(k ListKey) {
     delete(a.list, k)
}

func (a *ArrayList) Clear() {
     a.list = make(map[ListKey]ListVal)
}

func (a ArrayList) Has(k ListKey) bool {
     _, ok := a.list[k]
     return ok
}

func (a *ArrayList) Merge(list *ArrayList) {
     for k, v := range a.list {
          a.Add(k, v)
     }
}

func (a ArrayList) Count() int {
     return len(a.list)
}

func (a *ArrayList) ReplaceKey(oldKey, newKey ListKey) {
     if oldKey == newKey {
          return
     }
     a.Add(newKey, a.Get(oldKey))
     a.Del(oldKey)
}

func (a ArrayList) Keys() []ListKey {
     keys := make([]ListKey, 0, len(a.list))
     for k, _ := range a.list {
          keys = append(keys, k)
     }
     return keys
}