/// <summary>
/// 移除元素
/// </summary>
/// <param name="key">键</param>
public void Remove(TKey key)
{
Guard.Requires <ArgumentNullException>(key != null);
CacheNode <TKey, TVal> result;
if (!lruCache.TryGetValue(key, out result))
{
return;
}
lruCache.Remove(key);
if (result == tail)
{
tail = result.Backward;
}
if (result == header)
{
header = result.Forward;
}
if (result.Backward != null)
{
result.Backward.Forward = result.Forward;
}
}
/// <summary>
/// 移除最后一个元素
/// </summary>
private void RemoveLeastUsed()
{
lruCache.Remove(tail.KeyValue.Key);
tail.Backward.Forward = null;
tail = tail.Backward;
}