public void UpperBoundLinear_ArrayLengthIsOne()
{
var keys = new long[] { 1 };
int index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 0);
Assert.AreEqual(0, index);
index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 1);
Assert.AreEqual(-1, index);
}
public void UpperBoundLinear8_Seq()
{
for (int i = 1; i < 1000; i++)
{
var keys = GenerateKeys(i);
for (int k = 0; k < keys.Length; k++)
{
Assert.AreEqual(SearchHelpers.UpperBoundLinear(keys, keys.Length, keys[k]), SearchHelpers.UpperBoundLinear8(keys, keys.Length, keys[k]));
}
}
}
public void UpperBoundLinear8_Random()
{
for (int i = 1; i < 1000; i++)
{
var keys = GetSortedRandomKeys(i);
for (int k = 0; k < keys.Length; k++)
{
Assert.AreEqual(SearchHelpers.UpperBoundLinear(keys, keys.Length, keys[k]), SearchHelpers.UpperBoundLinear8(keys, keys.Length, keys[k]));
Assert.AreEqual(SearchHelpers.UpperBoundLinear(keys, keys.Length, keys[k] + 1), SearchHelpers.UpperBoundLinear8(keys, keys.Length, keys[k] + 1));
Assert.AreEqual(SearchHelpers.UpperBoundLinear(keys, keys.Length, keys[k] - 1), SearchHelpers.UpperBoundLinear8(keys, keys.Length, keys[k] - 1));
}
}
}
private static void CompareLinearAndBinarySearch()
{
for (int arraySize = 1; arraySize < 25; arraySize++)
{
Console.WriteLine("CompareLinearAndBinarySearch. ArraySize: {0}", arraySize);
Console.WriteLine("*******************************************************************");
int[] keys = new int[arraySize];
for (int i = 0; i < arraySize; i++)
{
keys[i] = i + 1;
}
Stopwatch sw = Stopwatch.StartNew();
long k = 0;
for (int i = 0; i < 1000000; i++)
{
k += SearchHelpers.UpperBoundLinear(keys, arraySize, arraySize);
}
sw.Stop();
Console.WriteLine("K: {0}. UpperBoundLinear: {1} ms", k, sw.ElapsedMilliseconds);
sw.Restart();
k = 0;
for (int i = 0; i < 1000000; i++)
{
k += SearchHelpers.UpperBoundLinear4(keys, arraySize, arraySize);
}
sw.Stop();
Console.WriteLine("K: {0}. UpperBoundLinear4: {1} ms", k, sw.ElapsedMilliseconds);
sw.Restart();
k = 0;
for (int i = 0; i < 1000000; i++)
{
k += SearchHelpers.UpperBoundLinear8(keys, arraySize, arraySize);
}
sw.Stop();
Console.WriteLine("K: {0}. UpperBoundLinear8: {1} ms", k, sw.ElapsedMilliseconds);
sw.Restart();
k = 0;
for (int i = 0; i < 1000000; i++)
{
k += SearchHelpers.UpperBoundBinary(keys, arraySize, arraySize);
}
sw.Stop();
Console.WriteLine("K: {0}. UpperBoundBinary: {1} ms", k, sw.ElapsedMilliseconds);
Console.WriteLine("*******************************************************************\r\n");
}
}
public void UpperBoundLinear_ContainsDuplicates()
{
var keys = new long[] { 1, 2, 3, 3 };
int index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 0);
Assert.AreEqual(0, index);
index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 1);
Assert.AreEqual(1, index);
index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 2);
Assert.AreEqual(2, index);
index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 3);
Assert.AreEqual(-1, index);
index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 4);
Assert.AreEqual(-1, index);
}
public void UpperBoundLinear_ArrayLengthIsThree()
{
var keys = new long[] { 1, 2, 3 };
int index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 0);
Assert.AreEqual(0, index);
index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 1);
Assert.AreEqual(1, index);
index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 2);
Assert.AreEqual(2, index);
index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 3);
Assert.AreEqual(-1, index);
index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 4);
Assert.AreEqual(-1, index);
}
public void UpperBoundLinear_ContainsDuplicates2()
{
var keys = new long[] { 1, 3, 3, 5, 7, 7, 9 };
int index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 0);
Assert.AreEqual(0, index);
index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 1);
Assert.AreEqual(1, index);
index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 2);
Assert.AreEqual(1, index);
index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 3);
Assert.AreEqual(3, index);
index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 4);
Assert.AreEqual(3, index);
index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 5);
Assert.AreEqual(4, index);
index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 6);
Assert.AreEqual(4, index);
index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 7);
Assert.AreEqual(6, index);
index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 8);
Assert.AreEqual(6, index);
index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 9);
Assert.AreEqual(-1, index);
index = SearchHelpers.UpperBoundLinear(keys, keys.Length, 10);
Assert.AreEqual(-1, index);
}
