public static void Samples()
{
// ------------------------------------------------------------
// Creating PersistentVectors
// ------------------------------------------------------------
// [create-hashmap]
// Create an empty PersistentHashMap and add some elements
PersistentHashMap <int, string> map =
PersistentHashMap <int, string> .Empty()
.Add(42, "hello")
.Add(99, "world");
Console.WriteLine(map[42]); // hello
Console.WriteLine(map[99]); // world
// Check no. of elements in the PersistentHashMap
Console.WriteLine(map.Length); // 2
// [/create-hashmap]
// [modify-hashmap]
PersistentHashMap <int, string> map2 =
map
.Add(104, "!")
.Add(42, "hi"); // replace existing value
Console.WriteLine(map2[42]); // hi
Console.WriteLine(map[42]); // hello
Console.WriteLine(map.Length); // 2
Console.WriteLine(map2.Length); // 3
// remove the last element from a PersistentHashMap
PersistentHashMap <int, string> map3 = map2.Remove(104);
Console.WriteLine(map3.Length); // 2
// [/modify-hashmap]
}
public void PersistentMapTests()
{
IPersistentMap <String, String> target = new PersistentHashMap <String, String>();
target = target.Assoc("k1", "v1");
target = target.Assoc("k2", "v2");
target = target.Assoc("k3", "v3");
target = target.Assoc("k4", "v4");
Assert.AreEqual(4, target.Count);
Assert.IsTrue(target.ContainsKey("k3"));
Assert.IsFalse(target.ContainsKey("x"));
Assert.AreEqual("k3", target.EntryAt("k3").Key);
Assert.AreEqual("v3", target.EntryAt("k3").Value);
Assert.AreEqual("v3", target.ValAt("k3"));
Assert.AreEqual("nf", target.ValAt("x", "nf"));
target = target.Assoc("k2", "vx");
Assert.AreEqual(4, target.Count);
Assert.AreEqual("vx", target.ValAt("k2"));
try
{
target = target.AssocEx("k2", "vy");
Assert.Fail();
}
catch (Exception)
{
//Expected exception
}
Assert.AreEqual(4, target.Count);
Assert.AreEqual("vx", target.ValAt("k2"));
target = target.Without("k3");
Assert.AreEqual(3, target.Count);
Assert.AreEqual("v4", target.ValAt("k4"));
target = target.Cons(new KeyValuePair <string, string>("k5", "v5"));
Assert.AreEqual(4, target.Count);
Assert.AreEqual("v5", target.ValAt("k5"));
target = target.Assoc(null, "null");
target = target.Assoc("null", null);
Assert.AreEqual(6, target.Count);
Assert.AreEqual("null", target.ValAt(null));
Assert.IsNull(target.ValAt("null"));
foreach (KeyValuePair <string, string> mapEntry in target)
{
if (mapEntry.Key != null && mapEntry.Key.Equals("null"))
{
Assert.IsNull(mapEntry.Value);
}
}
target = target.Empty();
Assert.AreEqual(0, target.Count);
target = target.Assoc("x", "y");
target = target.Assoc("z", "a");
IPersistentMap <String, String> target2 = new PersistentHashMap <String, String>();
target2 = target2.Assoc("x", "y");
target2 = target2.Assoc("z", "a");
Assert.AreEqual(target, target2);
Assert.AreEqual(target, target2);
Assert.AreEqual(target.GetHashCode(), target2.GetHashCode());
target2 = target2.Without("z");
target2 = target2.Without("b");
Assert.AreNotEqual(target, target2);
Assert.IsFalse(target == target2);
Assert.AreNotEqual(target, target2);
}
