protected override void Run()
{
LFUCache <int, string> cache = new LFUCache <int, string>(3);
Console.WriteLine("Adding p1");
cache.Set(1, "p1");
PrintTables(cache);
Console.WriteLine("Adding p2");
cache.Set(2, "p2");
PrintTables(cache);
Console.WriteLine("Adding p3");
cache.Set(3, "p3");
PrintTables(cache);
Console.WriteLine("Getting p1");
cache.Get(1);
PrintTables(cache);
Console.WriteLine("Getting p3");
cache.Get(3);
PrintTables(cache);
Console.WriteLine("Getting p3");
cache.Get(3);
PrintTables(cache);
Console.WriteLine("Adding p4");
cache.Set(4, "p4");
PrintTables(cache);
Console.WriteLine("Getting p4");
cache.Get(4);
PrintTables(cache);
Console.WriteLine("Adding p5");
cache.Set(5, "p5");
PrintTables(cache);
}
public void RunProblem()
{
var lfu = new LFUCache(2);
lfu.Put(1, 1);
lfu.Put(2, 2);
var v = lfu.Get(1);
lfu.Put(3, 3);
v = lfu.Get(2);
}
public void ShouldNotEvict()
{
var cache = new LFUCache(2);
Assert.Equal(-1, cache.Get(2));
cache.Put(2, 6);
Assert.Equal(-1, cache.Get(1));
cache.Put(1, 5);
cache.Put(1, 2);
Assert.Equal(2, cache.Get(1));
Assert.Equal(6, cache.Get(2));
}
public void Acceptance()
{
var lfu = new LFUCache <int, int>(2);
lfu.Put(3, 1);
lfu.Put(2, 1);
lfu.Put(2, 2); // replace key 2
lfu.Put(4, 4); // evicts key 3
Assert.False(lfu.TryGet(3, out var _));
Assert.Equal(4, lfu.Get(4));
Assert.Equal(2, lfu.Get(2));
}
public void GotTimeout()
{
//["LFUCache","put","put","put","get","put","put","get","put","put","get","put","get","get","get","put","put","get","put","get"]
//[[10],[7,28],[7,1],[8,15],[6],[10,27],[8,10],[8],[6,29],[1,9],[6],[10,7],[1],[2],[13],[8,30],[1,5],[1],[13,2],[12]]
var cache = new LFUCache(10);
var commands = new []
{
"put", "put", "put", "get", "put", "put", "get", "put", "put", "get", "put", "get", "get", "get", "put",
"put", "get", "put", "get"
};
var parameters = new int[, ]
{
{ 7, 28 }, { 7, 1 }, { 8, 15 }, { 6, -1 }, { 10, 27 }, { 8, 10 }, { 8, -1 }, { 6, 29 }, { 1, 9 }, { 6, -1 }, { 10, 7 }, { 1, -1 }, { 2, -1 }, { 13, -1 },
{ 8, 30 }, { 1, 5 }, { 1, -1 }, { 13, 2 }, { 12, -1 }
};
for (int i = 0; i < commands.Length; i++)
{
var command = commands[i];
switch (command)
{
case "put":
cache.Put(parameters[i, 0], parameters[i, 1]);
break;
case "get":
cache.Get(parameters[i, 0]);
break;
}
}
}
public void Example3()
{
var lfu = new LFUCache <int, int>(0, -1);
lfu.Put(0, 0);
Assert.AreEqual(-1, lfu.Get(0));
}
public void UpdateElement()
{
var cache = new LFUCache(2);
cache.Put(3, 1);
cache.Put(2, 1);
cache.Put(2, 2);
cache.Put(4, 4);
Assert.Equal(2, cache.Get(2));
}
public static void DownloadImage(String url, ResultHandler resultHandler, [CallerMemberName] string caller = null)
{
String urll = url.ToLower().Trim();
try
{
if (cachedImage.Contains(urll))
{
resultHandler(cachedImage.Get(urll));
return;
}
new Task(() =>
{
using (WebClient client = new WebClient())
{
Console.WriteLine(caller + " downloading sticker...");
byte[] data = client.DownloadData(url);
BitmapImage bitmap = new BitmapImage();
bitmap.BeginInit();
bitmap.StreamSource = new MemoryStream(data);
bitmap.EndInit();
if (resultHandler != null)
{
bitmap.Freeze();
Application.Current.Dispatcher.Invoke(() =>
{
cachedImage.AddReplace(urll, bitmap);
resultHandler(bitmap);
});
}
}
}).Start();
} catch (Exception e)
{
}
}
private static void Run()
{
var cache = new LFUCache(2); // capacity
cache.Put(1, 1);
cache.Put(2, 2);
cache.Get(1); // returns 1
cache.Put(3, 3); // evicts key 2
cache.Get(2); // returns -1 (not found)
cache.Get(3); // returns 3.
cache.Put(4, 4); // evicts key 1.
cache.Get(1); // returns -1 (not found)
cache.Get(3); // returns 3
cache.Get(4); // returns 4
}
public void Run()
{
LFUCache cache = new LFUCache(2 /* capacity (缓存容量) */);
cache.Put(1, 1);
cache.Put(2, 2);
cache.Get(1); // 返回 1
cache.Put(3, 3); // 去除 key 2
cache.Get(2); // 返回 -1 (未找到key 2)
cache.Get(3); // 返回 3
cache.Put(4, 4); // 去除 key 1
cache.Get(1); // 返回 -1 (未找到 key 1)
cache.Get(3); // 返回 3
cache.Get(4); // 返回 4
}
public void GivenLFUCache_Put_ShouldPutKeyValuePairIntoTheCache()
{
var cache = new LFUCache(2);
cache.Put(1, 1);
cache.Put(2, 2);
Assert.IsTrue(cache.Get(1) == 1); // returns 1
cache.Put(3, 3); // evicts key 2
Assert.IsTrue(cache.Get(2) == -1); // returns -1 (not found)
Assert.IsTrue(cache.Get(3) == 3); // returns 3.
cache.Put(4, 4); // evicts key 1.
Assert.IsTrue(cache.Get(1) == -1); // returns -1 (not found)
Assert.IsTrue(cache.Get(3) == 3); // returns 3
Assert.IsTrue(cache.Get(4) == 4); // returns 4
}
public void Example2()
{
var lfu = new LFUCache <int, int>(3, -1);
lfu.Put(2, 2);
lfu.Put(1, 1);
Assert.AreEqual(2, lfu.Get(2));
Assert.AreEqual(1, lfu.Get(1));
Assert.AreEqual(2, lfu.Get(2));
lfu.Put(3, 3);
lfu.Put(4, 4);
Assert.AreEqual(-1, lfu.Get(3));
Assert.AreEqual(2, lfu.Get(2));
Assert.AreEqual(1, lfu.Get(1));
Assert.AreEqual(4, lfu.Get(4));
}
public void TestCase()
{
var cache = new LFUCache(2);
cache.Put(1, 1);
cache.Put(2, 2);
Assert.AreEqual(1, cache.Get(1));
cache.Put(3, 3);
Assert.AreEqual(-1, cache.Get(2));
Assert.AreEqual(3, cache.Get(3));
cache.Put(4, 4);
Assert.AreEqual(-1, cache.Get(1));
Assert.AreEqual(3, cache.Get(3));
Assert.AreEqual(4, cache.Get(4));
}
public static void Main()
{
var cache = new LFUCache(2);
cache.Put(1, 1);
cache.Put(2, 2);
var value = cache.Get(1);
cache.Put(3, 3);
value = cache.Get(2);
value = cache.Get(3);
cache.Put(4, 4);
value = cache.Get(1);
value = cache.Get(3);
value = cache.Get(4);
}
public void Basic()
{
var cache = new LFUCache(2);
cache.Put(1, 1);
cache.Put(2, 2);
Assert.Equal(1, cache.Get(1));
cache.Put(3, 3); // evicts key 2
Assert.Equal(-1, cache.Get(2)); // returns -1 (not found)
Assert.Equal(3, cache.Get(3)); // returns 3.
cache.Put(4, 4); // evicts key 1.
Assert.Equal(-1, cache.Get(1)); // returns -1 (not found)
Assert.Equal(3, cache.Get(3)); // returns 3
Assert.Equal(4, cache.Get(4)); // returns 4
}
public void LFUCacheTest()
{
// ["LFUCache","put","put","get","put","get","get","put","get","get","get"]
// [[2],[1,1],[2,2],[1],[3,3],[2],[3],[4,4],[1],[3],[4]]
int result;
LFUCache lfuCache = new LFUCache(2);
lfuCache.Put(1, 1);
lfuCache.Put(2, 2);
result = lfuCache.Get(1);
lfuCache.Put(3, 3);
result = lfuCache.Get(2);
result = lfuCache.Get(3);
lfuCache.Put(4, 4);
result = lfuCache.Get(1);
result = lfuCache.Get(3);
result = lfuCache.Get(4);
//result = lfuCache.Get(3);
// Test case 2:
// ["LFUCache","put","put","put","put","get"]
//[[2],[3,1],[2,1],[2,2],[4,4],[2]]
lfuCache = new LFUCache(2);
lfuCache.Put(3, 1);
lfuCache.Put(2, 1);
lfuCache.Put(2, 2);
lfuCache.Put(2, 4);
result = lfuCache.Get(2);
}
static void Main(string[] args)
{
LFUCache cache = new LFUCache(3);
cache.Put(1, 1);
int rs = cache.Get(1);
rs = cache.Get(1);
rs = cache.Get(1);
Console.WriteLine($"Result: {rs} - Expect: {1}");
cache.Put(2, 2);
cache.Put(3, 3);
cache.Put(4, 4);
rs = cache.Get(2);
Console.WriteLine($"Result: {rs} - Expect: {-1}");
rs = cache.Get(4);
Console.WriteLine($"Result: {rs} - Expect: {4}");
rs = cache.Get(4);
rs = cache.Get(4);
rs = cache.Get(3);
Console.WriteLine($"Result: {rs} - Expect: {3}");
cache.Put(5, 5);
rs = cache.Get(2);
Console.WriteLine($"Result: {rs} - Expect: {-1}");
rs = cache.Get(5);
Console.WriteLine($"Result: {rs} - Expect: {5}");
// phase 2
cache = new LFUCache(1);
cache.Put(1, 1);
rs = cache.Get(1);
Console.WriteLine($"Result: {rs} - Expect: {1}");
cache.Put(1, 3);
rs = cache.Get(1);
Console.WriteLine($"Result: {rs} - Expect: {3}");
cache.Put(2, 4);
rs = cache.Get(2);
Console.WriteLine($"Result: {rs} - Expect: {4}");
rs = cache.Get(1);
Console.WriteLine($"Result: {rs} - Expect: {-1}");
// phase 3
cache = new LFUCache(2);
cache.Put(1, 1);
cache.Put(2, 2);
rs = cache.Get(1);
Console.WriteLine($"Result: {rs} - Expect: {1}");
cache.Put(3, 3);
rs = cache.Get(2);
Console.WriteLine($"Result: {rs} - Expect: {-1}");
rs = cache.Get(3);
Console.WriteLine($"Result: {rs} - Expect: {3}");
cache.Put(4, 4);
rs = cache.Get(1);
Console.WriteLine($"Result: {rs} - Expect: {-1}");
rs = cache.Get(-1);
Console.WriteLine($"Result: {rs} - Expect: {-1}");
rs = cache.Get(3);
Console.WriteLine($"Result: {rs} - Expect: {3}");
cache = new LFUCache(0);
cache.Put(0, 0);
cache.Get(0);
}