// -----------------------------------------------------------------------------
// Parallelism Example:
//
// Generate a sizable list, and sort it in ascending and descending order, in parallel.
//
private static void Para(MyContainer <int> .CompareDelegate cmpIntLt, MyContainer <int> .CompareDelegate cmpIntGt)
{
var rg = new Random(1701); // fix a seed for deterministic results
var ic1 = new MyContainer <int>();
for (var i = 0; i < MyContainer <int> .MaxItems; i++)
{
ic1.Add(rg.Next());
}
Console.WriteLine("Input array:");
ic1.Print();
var ic2 = (MyContainer <int>)ic1.Clone();
Console.WriteLine("Sorting a random array ...");
/* sequential code: */
ic1.Sort(cmpIntLt);
ic2.Sort(cmpIntGt);
/* parallel code: */
Parallel.Invoke( // generate two parallel threads
() => ic1.Sort(cmpIntLt),
() => ic2.Sort(cmpIntGt));
/* parallelised sorting algorithm: */
ic1.ParSort(cmpIntLt);
ic2.ParSort(cmpIntGt);
Console.WriteLine("Sorted (ascending):");
ic1.Print();
Console.WriteLine("Sorted?: {0}", ic1.IsSorted(cmpIntLt).ToString());
Console.WriteLine("Sorted (descending):");
ic2.Print();
Console.WriteLine("Sorted?: {0}", ic2.IsSorted(cmpIntGt).ToString());
}
public static void Main()
{
var cont = new MyContainer <string>("One", "Two", "Three", "Four");
var tst = new Tester();
Console.WriteLine($"Container of strings initialised, containing {cont.Count} items");
// direct write access
try
{
cont[4] = "Five";
}
catch (MyContainer <string> .ContainerException e)
{
Console.WriteLine(e.Message);
Console.WriteLine(
$"Implementation restriction: can only write to an existing field; currently only fields up to {cont.Count - 1} exist");
}
// direct read access
Console.WriteLine("Printing contents using for loop: ");
for (var i = 0; i < cont.Count; i++)
{
Console.WriteLine($"cont[{i}]: {cont[i]}");
}
// make use of IEnumerable implementation
Console.WriteLine("Printing contents using foreach loop: ");
foreach (var s in cont)
{
Console.WriteLine($"Value: {s}");
}
Console.WriteLine("Sorting contents alphabetically (delegate version) ...");
var cmpLt = new MyContainer <string> .CompareDelegate(string.Compare);
cont.Sort(cmpLt);
cont.Print();
Console.WriteLine("Reverse sorting contents alphabetically (delegate version) ...");
var cmpGt =
new MyContainer <string> .CompareDelegate((s1, s2) =>
- 1 *string.CompareOrdinal(s1, s2));
cont.Sort(cmpGt);
cont.Print();
Console.WriteLine("Sorting contents alphabetically (IComparable version) ...");
cont.Sort0();
cont.Print();
// container with int contents
var intArr = new[] { 8, 4, 6, 2 };
var intCont = new MyContainer <int>(intArr);
Console.WriteLine($"Container of int initialised, containing {intCont.Count} items");
Console.WriteLine("Sorting contents ...");
MyContainer <int> .CompareDelegate cmpIntLt = int_lt;
intCont.Sort(cmpIntLt);
intCont.Print();
Console.WriteLine("Reverse sorting contents ...");
var cmpIntGt = new MyContainer <int> .CompareDelegate(int_gt);
intCont.Sort(cmpIntGt);
intCont.Print();
Console.WriteLine("Sorting contents (IComparable version) ...");
intCont.Sort0();
intCont.Print();
Para(cmpIntLt, cmpIntGt);
}
public MyEnumerator(MyContainer <T> cont)
{
_currIdx = -1; // NB: needs to start with -1;
_thisCont = cont;
}
