public void BinarySearchTest2()
{
var array = new int[] { 1, 2, 3, 4, 5, 6, 7 };
var expected = -1;
var actual = SearchAlgorithms.BinarySearch <int>(array, 9, (a, b) => a - b);
Assert.AreEqual(expected, actual);
}
static void ProcessCarplates()
{
var plates = SwedishCarPlate.GenerateCarPlates((int)Math.Pow(2, 13));
//var plates = SwedishCarPlate.GenerateCarPlates(5);
//foreach (var item in plates)
//{
// Console.WriteLine(item.CarPlate);
//}
//SortAlgorithm.BubbleSort<SwedishCarPlate>(plates, SwedishCarPlate.IsLettersOfALessThanB);
//var letterSorted = (SwedishCarPlate[]) plates.Clone();
//foreach (var item in letterSorted)
//{
// Console.WriteLine(item.CarPlate);
//}
SortAlgorithm.BubbleSort <SwedishCarPlate>(plates, SwedishCarPlate.IsNumbersOfALessThanB);
//var numberSorted = (SwedishCarPlate[])plates.Clone();
//foreach (var item in numberSorted)
//{
// Console.WriteLine(item.CarPlate);
//}
//Console.Write("Search Letters:");
//var input = Console.ReadLine();
//var position = SearchAlgorithms.BinarySearch<SwedishCarPlate>(letterSorted, new SwedishCarPlate { Letters = input }, SwedishCarPlate.CompareLetters);
//Console.WriteLine("Position: " + position);
Console.Write("Search Numbers:");
var input = Console.ReadLine();
var position = SearchAlgorithms.BinarySearch <SwedishCarPlate>(plates, new SwedishCarPlate {
Numbers = input
}, SwedishCarPlate.CompareNumbers);
if (position > -1)
{
var similarPlates = SearchAlgorithms.RegionGrow <SwedishCarPlate>(plates, position, (a, b) => SwedishCarPlate.CompareNumbers(a, b) == 0);
Console.WriteLine("Position: " + position + " -> " + plates[position].CarPlate);
Console.WriteLine(String.Join(", ", similarPlates.Select(a => a.CarPlate)));
}
}
private static void Demo()
{
int[] arr = new int[] { 3, -1, 15, 4, 17, 2, 33, 0 };
var arr2 = new int[] { 1, 2 };
Console.WriteLine("arr = [{0}]", string.Join(", ", arr));
SortingAlgorithms.SelectionSort(arr);
Console.WriteLine("sorted = [{0}]", string.Join(", ", arr));
// SortingAlgorithms.SelectionSort(new int[0]); // Test sorting empty array
SortingAlgorithms.SelectionSort(new int[1]); // Test sorting single element array
Console.WriteLine(SearchAlgorithms.BinarySearch(arr, -1000));
Console.WriteLine(SearchAlgorithms.BinarySearch(arr, 0));
Console.WriteLine(SearchAlgorithms.BinarySearch(arr, 17));
Console.WriteLine(SearchAlgorithms.BinarySearch(arr, 10));
Console.WriteLine(SearchAlgorithms.BinarySearch(arr, 1000));
}
static void CarPlateBenchmark(int repeats)
{
for (int i = 10; i <= 15; i++)
{
var plates = SwedishCarPlate.GenerateCarPlates((int)Math.Pow(2, i));
var dict = plates.GroupBy(p => p.Letters, p => p).ToDictionary(g => g.Key, g => g.ToList());
//foreach (var item in dict)
//{
// Console.WriteLine(item.Key + ": " + string.Join(",", item.Value.Select(p => p.CarPlate)));
//}
Stopwatch w = Stopwatch.StartNew();
for (int j = 0; j < repeats; j++)
{
dict.ContainsKey(SwedishCarPlate.GetRandomLetters());
}
w.Stop();
Console.WriteLine($"Time to search in Dictionary {repeats} times: {w.ElapsedMilliseconds} ms");
SortAlgorithm.BubbleSort <SwedishCarPlate>(plates, SwedishCarPlate.IsLettersOfALessThanB);
w.Restart();
for (int j = 0; j < repeats; j++)
{
var plate = new SwedishCarPlate {
Letters = SwedishCarPlate.GetRandomLetters()
};
//Console.WriteLine("search for: " + plate.CarPlate);
var pos = SearchAlgorithms.BinarySearch <SwedishCarPlate>(plates,
plate,
SwedishCarPlate.CompareLetters);
//if (pos >= 0)
//{
// var result = SearchAlgorithms.RegionGrow<SwedishCarPlate>(plates, pos, (a, b) => SwedishCarPlate.CompareLetters(a, b) == 0);
//}
}
w.Stop();
Console.WriteLine($"Time to binarySearch {repeats} times: {w.ElapsedMilliseconds} ms");
}
}
static void Main(string[] args)
{
SearchAlgorithms.BinarySearch(arr, 7);
}
