icdsystems/ICD.Common.Utils
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Merge branch 'feat/GetCliqueOptimization' of Common/Utils into ConnectPro_v1.3

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Chris Cameron 2019-06-27 15:02:00 +00:00 • committed by Gogs
commit 1f6915a825
3 changed files with 17 additions and 8 deletions
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1
CHANGELOG.md
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@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
### Added
- Added RecursionUtils method to get a single clique given a starting node
- Breadth First Search can now search graphs in addition to trees
### Changed
- Fixed bug in IcdUriBuilder where Query property behaved differently to UriBuilder

4
ICD.Common.Utils.Tests/RecursionUtilsTest.cs
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@ -130,7 +130,7 @@ namespace ICD.Common.Utils.Tests
[Test]
public void GetCliqueSingleNodeTest()
{
int[] clique = RecursionUtils.GetClique(s_CliqueGraph.Keys, 1, n => s_CliqueGraph[n]).ToArray();
int[] clique = RecursionUtils.GetClique(1, n => s_CliqueGraph[n]).ToArray();
Assert.AreEqual(4, clique.Length);
Assert.IsTrue(clique.Contains(1));
@ -138,7 +138,7 @@ namespace ICD.Common.Utils.Tests
Assert.IsTrue(clique.Contains(3));
Assert.IsTrue(clique.Contains(4));
clique = RecursionUtils.GetClique(s_CliqueGraph.Keys, 5, n => s_CliqueGraph[n]).ToArray();
clique = RecursionUtils.GetClique(5, n => s_CliqueGraph[n]).ToArray();
Assert.AreEqual(2, clique.Length);
Assert.IsTrue(clique.Contains(5));

20
ICD.Common.Utils/RecursionUtils.cs
View file

@ -36,14 +36,18 @@ namespace ICD.Common.Utils
/// Gets the clique containing the given node.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="nodes"></param>
/// <param name="node"></param>
/// <param name="getAdjacent"></param>
/// <returns></returns>
public static IEnumerable<T> GetClique<T>(IEnumerable<T> nodes, T node, Func<T, IEnumerable<T>> getAdjacent)
public static IEnumerable<T> GetClique<T>(T node, Func<T, IEnumerable<T>> getAdjacent)
{
Dictionary<T, IEnumerable<T>> map = nodes.ToDictionary(n => n, getAdjacent);
return GetClique(map, node);
if (node == null)
throw new ArgumentNullException("node");
if (getAdjacent == null)
throw new ArgumentNullException("getAdjacent");
return BreadthFirstSearch(node, getAdjacent);
}
/// <summary>
@ -163,7 +167,7 @@ namespace ICD.Common.Utils
}
/// <summary>
/// Returns all of the nodes in the tree via breadth-first search.
/// Returns all of the nodes in the graph via breadth-first search.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="root"></param>
@ -171,6 +175,7 @@ namespace ICD.Common.Utils
/// <returns></returns>
private static IEnumerable<T> BreadthFirstSearchIterator<T>(T root, Func<T, IEnumerable<T>> getChildren)
{
IcdHashSet<T> visited = new IcdHashSet<T> {root};
Queue<T> process = new Queue<T>();
process.Enqueue(root);
@ -179,8 +184,11 @@ namespace ICD.Common.Utils
{
yield return current;
foreach (T child in getChildren(current))
foreach (T child in getChildren(current).Where(c => !visited.Contains(c)))
{
visited.Add(child);
process.Enqueue(child);
}
}
}