/// <summary>
/// Seeks a target string, starting from a start string, with a given grouped similarities that must be part of a given source
/// </summary>
/// <param name="start">The start string to search from</param>
/// <param name="target">The target string to find</param>
/// <param name="source">The allowed contents that the search can be done at</param>
/// <param name="similarityGroups">The similarity groups that were already found</param>
/// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is <see cref="CancellationToken.None"/></param>
/// <returns>True if the target is found</returns>
public virtual async Task <bool> SeekTarget(string start, string target, ConcurrentHashSet <string> source, ConcurrentDictionary <string, ICollection <string> > similarityGroups, CancellationToken cancellationToken = default)
{
var pathsContent = new List <string>();
pathsContent.Add(start);
var foundTarget = false;
while (pathsContent.Any() && !foundTarget && !cancellationToken.IsCancellationRequested)
{
var alreadyKnown = new ConcurrentHashSet <string>();
var tasks = new List <Task <bool> >();
var length = pathsContent.Count;
_log.LogDebug("Iterating all paths seeking for target. Size is {length}", length);
for (int i = 0; i < length; i++)
{
var group = pathsContent.First();
pathsContent.Remove(group);
tasks.Add(Task.Run(() => IterateLetters(group, target, source, similarityGroups, alreadyKnown, pathsContent)));
}
bool[] foundInSeries = await Task.WhenAll(tasks);
if (foundInSeries.Any(f => f))
{
foundTarget = true;
}
source.RemoveWhere(alreadyKnown.Contains);
}
return(foundTarget);
}
public void RemoveWhere_Success()
{
var hashSet = new ConcurrentHashSet <string>();
Parallel.For(0, 50000, i =>
{
hashSet.Add(i.ToString());
});
Parallel.For(0, 50000, i =>
{
if (i % 2 == 0)
{
hashSet.RemoveWhere(ind => ind.Equals(i.ToString()));
}
});
var count = 0;
foreach (var index in hashSet)
{
count++;
}
Assert.AreEqual(25000, count);
}
public void ConcurrentHashSet()
{
ConcurrentHashSet <int> playSet = new ConcurrentHashSet <int>();
ConcurrentHashSet <int> smallSet = new ConcurrentHashSet <int>(new int[] { 0, 1 });
ConcurrentHashSet <int> bigSet = new ConcurrentHashSet <int>(new int[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }, EqualityComparer <int> .Default);
ConcurrentHashSet <int> nullSet = null;
Assert.AreEqual(EqualityComparer <int> .Default, bigSet.Comparer);
Assert.IsFalse(string.IsNullOrEmpty(smallSet.ToString()));
Assert.IsTrue(smallSet.IsProperSubsetOf(bigSet));
Assert.IsTrue(smallSet.IsSubsetOf(bigSet));
Assert.IsTrue(bigSet.IsProperSupersetOf(smallSet));
Assert.IsTrue(bigSet.IsSupersetOf(smallSet));
playSet.TryAdd(0);
((ICollection <int>)playSet).Add(1);
Assert.IsTrue(playSet.Contains(0));
Assert.IsTrue(smallSet.SetEquals(playSet));
Assert.IsFalse(smallSet.SetEquals(bigSet));
Assert.IsFalse(smallSet.SetEquals(null));
Assert.IsTrue(smallSet.IsSubsetOf(playSet));
Assert.IsFalse(bigSet.IsSubsetOf(playSet));
Assert.IsFalse(bigSet.IsSubsetOf(null));
Assert.IsFalse(playSet.IsSupersetOf(bigSet));
Assert.IsTrue(playSet.IsSupersetOf(null));
Assert.IsFalse(bigSet.IsSubsetOf(playSet));
Assert.IsFalse(bigSet.IsSubsetOf(null));
Assert.IsFalse(smallSet.IsProperSubsetOf(playSet));
Assert.IsFalse(playSet.IsProperSupersetOf(smallSet));
Assert.IsTrue(playSet.IsProperSupersetOf(null));
Assert.IsFalse(smallSet.IsProperSubsetOf(null));
Assert.IsFalse(smallSet.IsProperSubsetOf(new ConcurrentHashSet <int>(new int[] { 3, 4, 5 })));
Assert.IsFalse(smallSet.IsSupersetOf(new ConcurrentHashSet <int>(new int[] { 3, 4, 5 })));
Assert.IsFalse(smallSet.IsSubsetOf(new ConcurrentHashSet <int>(new int[] { 3, 4, 5 })));
Assert.IsFalse(new ConcurrentHashSet <int>(new int[] { 3, 4, 5 }).IsProperSupersetOf(smallSet));
Assert.IsFalse(new ConcurrentHashSet <int>(new int[] { 3, 4, 5 }).IsSupersetOf(smallSet));
Assert.IsFalse(new ConcurrentHashSet <int>(new int[] { 3, 4, 5 }).Overlaps(smallSet));
IEqualityComparer <ConcurrentHashSet <int> > setComparer = ConcurrentHashSet <int> .CreateSetComparer();
Assert.IsTrue(setComparer.Equals(smallSet, playSet));
Assert.IsFalse(setComparer.Equals(bigSet, playSet));
Assert.AreEqual(setComparer.GetHashCode(smallSet), setComparer.GetHashCode(playSet));
Assert.IsTrue(setComparer.Equals(smallSet, smallSet));
Assert.IsFalse(setComparer.Equals(smallSet, nullSet));
Assert.IsFalse(setComparer.Equals(nullSet, smallSet));
Assert.IsFalse(smallSet.IsReadOnly);
Assert.IsTrue(smallSet.Overlaps(bigSet));
Assert.IsFalse(smallSet.Overlaps(null));
int[] test = new int[2];
smallSet.CopyTo(test);
smallSet.CopyTo(test, 0);
smallSet.Add(2);
playSet.Remove(1);
bigSet.ExceptWith(playSet);
bigSet.ExceptWith(null);
Assert.IsFalse(bigSet.Contains(0));
Assert.IsTrue(bigSet.Contains(1));
smallSet.IntersectWith(playSet);
Assert.IsTrue(smallSet.Contains(0));
Assert.IsFalse(smallSet.Contains(1));
ConcurrentHashSet <int> niSet = new ConcurrentHashSet <int>();
niSet.Add(0);
Assert.IsFalse(niSet.IsEmpty);
niSet.IntersectWith(null);
Assert.IsTrue(niSet.IsEmpty);
niSet.Add(0);
Assert.AreEqual(1, niSet.Count);
niSet.RemoveWhere(null);
Assert.AreEqual(1, niSet.Count);
smallSet.IntersectWith(playSet);
playSet.Add(0);
playSet.Add(2);
playSet.RemoveWhere(n => n != 0);
Assert.IsTrue(playSet.Contains(0));
Assert.IsFalse(playSet.Contains(1));
playSet.Add(0);
playSet.Add(2);
smallSet.Add(1);
playSet.SymmetricExceptWith(smallSet);
playSet.SymmetricExceptWith(null);
Assert.IsFalse(playSet.Contains(0));
Assert.IsTrue(playSet.Contains(1));
Assert.IsTrue(playSet.Contains(2));
playSet.UnionWith(smallSet);
playSet.UnionWith(null);
Assert.IsTrue(playSet.Contains(0));
Assert.IsTrue(playSet.Contains(1));
Assert.IsTrue(playSet.Contains(2));
Assert.IsFalse(playSet.Contains(3));
playSet.Clear();
Assert.IsFalse(smallSet.IsSubsetOf(playSet));
foreach (object o in ((System.Collections.IEnumerable)smallSet))
{
Assert.IsTrue(o is int);
Assert.IsTrue((int)o < 10);
}
}
