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42 lines
678 B
42 lines
678 B
package LRUCache
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import "container/list"
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type item struct {
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key string
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value string
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pos *list.Element
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}
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type LRU struct {
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ul list.List
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data map[string]*item
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Maxsize int
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}
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func (lru LRU) Get(key string) string {
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i := lru.data[key]
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if i != nil {
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lru.ul.Remove(i.pos)
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lru.ul.PushBack(i)
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return i.value
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} else {
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return ""
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}
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}
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func (lru LRU) Set(key string, value string) {
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i := &item{key: key, value: value}
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lru.data[key] = i
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lru.ul.Remove(i.pos)
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lru.ul.PushBack(i)
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if lru.ul.Len() > lru.Maxsize {
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lru.ul.Remove(lru.ul.Front())
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}
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i.pos = lru.ul.Back()
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}
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func (lru LRU) Init() {
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lru.data = make(map[string]*item)
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lru.ul = list.List{}
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}
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