public static Matrix Generate(Node parentNode)
{
Dictionary<Node, int> offsets = new Dictionary<Node, int>();
int depth = parentNode.GetMaxDepth();
int height = depth * (Settings.DefaultHeight + Settings.RoomCoridorLenght);
var allNodes = new[] { parentNode }.FancyFlatten(n => true, n => n.Nodes).ToArray();
var biggestLevel = allNodes.GroupBy(n => n.Level).OrderBy(g => g.Sum(n => n.GetSize())).Last();
Console.WriteLine("Biggest level id " + biggestLevel.Key);
Console.WriteLine("Biggest level count " + biggestLevel.Sum(n => n.GetSize()));
int labyrinthWidth = parentNode.GetSize();
Matrix matrix = new Matrix(labyrinthWidth, height);
int yOffset = 0;
int xOffset = 0;
foreach (var levelGroup in allNodes.GroupBy(n => n.Level))
{
Node currentParent = null;
foreach (Node groupNode in levelGroup)
{
if (groupNode.Parent != null)
{
if (currentParent != groupNode.Parent)
{
yOffset = 0;
}
}
currentParent = groupNode.Parent;
Room room = new Room(groupNode.GetSize(), groupNode.Name, groupNode.Color, groupNode.Devices);
var parentOffset = 0;
if (groupNode.Parent != null)
parentOffset = offsets[groupNode.Parent];
matrix.Merge(room.AsMatrix(), yOffset + parentOffset, xOffset);
offsets.Add(groupNode, yOffset + parentOffset);
yOffset += groupNode.GetSize() + Settings.Scale;
}
xOffset += Settings.DefaultHeight + Settings.RoomCoridorLenght - 1;
yOffset = 0;
}
return matrix;
}
public void GroupBy1()
{
var pairs = new[]
{
KeyValuePair.Create("A", 1),
KeyValuePair.Create("B", 2),
KeyValuePair.Create("C", 3),
KeyValuePair.Create("a", 4),
KeyValuePair.Create("B", 5),
KeyValuePair.Create("A", 6),
KeyValuePair.Create("d", 7),
};
var groups = pairs.GroupBy(StringComparer.OrdinalIgnoreCase);
AssertEx.SetEqual(new[] { "A", "B", "C", "d" }, groups.Keys);
Assert.Equal(0, groups["A"].Key);
AssertEx.Equal(new[] { 1, 4, 6 }, groups["A"].Value);
Assert.Equal(0, groups["B"].Key);
AssertEx.Equal(new[] { 2, 5 }, groups["B"].Value);
Assert.Equal(3, groups["C"].Key);
Assert.True(groups["C"].Value.IsDefault);
Assert.Equal(7, groups["d"].Key);
Assert.True(groups["d"].Value.IsDefault);
}
/// <summary>
/// Compiles AST clauses into an executable program understood by the <see cref="Runtime.Engine"/> .
/// The input clauses are not required to be in any particular order.
/// </summary>
public static Compiled.Program Compile (AST.Program program)
{
var allClauses = new []
{
program.DcgClauses.Select (DcgClauseToNormalClause),
program.Clauses
}.SelectMany (a => a);
var clauseGroups = allClauses.GroupBy (c => Tuple.Create (c.Head.PredicateName, c.Head.Arguments.Length), c => c).ToArray ();
var prologPredicates = clauseGroups.ToDictionary (p => p.Key, p => new Compiled.PrologPredicate {Name = p.Key.Item1});
// Dictionary is not covariant so it takes a new dictionary to get a dictionary of base types (Predicate).
var predicates = prologPredicates.ToDictionary (p => p.Key, CastPrologPredicateToBasePredicate);
if (program.ExternalPredicates != null)
{
foreach (var externalPredicate in program.ExternalPredicates)
{
predicates.Add (Tuple.Create(externalPredicate.Name, externalPredicate.Arity), new Compiled.ExternalPredicate (externalPredicate.Name));
}
}
foreach (var clauseGroup in clauseGroups)
{
var prologPredicate = prologPredicates [clauseGroup.Key];
prologPredicate.Clauses = clauseGroup.Select (c => new Compiled.Clause {Head = new Compiled.Goal {Predicate = prologPredicate, Arguments = c.Head.Arguments},
Body = Compile (c.Body, predicates)}).ToArray ();
}
return new Compiled.Program (predicates);
}
public static void Main()
{
var students = new[]
{
new { FirstName = "Eminem", Group = "Mathematics" },
new { FirstName = "DMX", Group = "Geography" },
new { FirstName = "2Pac", Group = "History" },
new { FirstName = "Spens", Group = "Mathematics" },
new { FirstName = "Rick Ross", Group = "History" },
new { FirstName = "Mary J Blige", Group = "History" },
new { FirstName = "Lil Jon", Group = "Mathematics" },
new { FirstName = "Gucci Mane", Group = "Geography" },
new { FirstName = "Hazarta", Group = "Mathematics" },
};
// 18.LINQ
// var groupedStudents =
// from st in students
// group st by st.Group into g
// orderby g.Key
// select g;
// 19.Lambda expression
var groupedStudents = students.GroupBy(st => st.Group).OrderBy(g => g.Key);
foreach (var group in groupedStudents)
{
foreach (var student in group)
{
Console.WriteLine("{0,11} - {1}", student.Group, student.FirstName);
}
}
}
public void NeedToSubscribeImediatelyWhenSplitting()
{
var averages = new[] {0.0, 0.0};
var numbers = new[] {22, 22, 99, 22, 101, 22}.ToObservable();
var split = numbers.GroupBy(n => n%2);
split.Subscribe((IGroupedObservable<int, int> g) => g.Average().Subscribe(a => averages[g.Key] = a));
Assert.AreEqual(22, averages[0]);
Assert.AreEqual(100, averages[1]);
}
public void TestMethod()
{
var doclist = new[] {
new {RelatingDocument = "Doc1", RelatedObjects = new List<string>() { "Ent1", "Ent2", "Ent3", "Ent4", "Ent5" } },
new {RelatingDocument = "Doc1", RelatedObjects = new List<string>() { "Ent1", "Ent6", "Ent7" } },
new {RelatingDocument = "Doc1", RelatedObjects = new List<string>() { "Ent8", "Ent9" } },
new {RelatingDocument = "Doc2", RelatedObjects = new List<string>() { "Ent1", "Ent6", "Ent7" } },
new {RelatingDocument = "Doc3", RelatedObjects = new List<string>() { "Ent1", "Ent6" } },
new {RelatingDocument = "Doc4", RelatedObjects = new List<string>() { "Ent1", "Ent2", "Ent7" } },
new {RelatingDocument = "Doc5", RelatedObjects = new List<string>() { "Ent1", "Ent2", "Ent3" } },
new {RelatingDocument = "Doc1", RelatedObjects = new List<string>() { "Ent10", "Ent11" } },
new {RelatingDocument = "Doc2", RelatedObjects = new List<string>() { "Ent10", "Ent11" } },
}.ToList();
Dictionary<string, List<string>> dic = null;
//check for duplicates
var dups = doclist.GroupBy(d => d.RelatingDocument).SelectMany(grp => grp.Skip(1));
//combine object lists to single key value, merge lists
var dupsMerge = dups.GroupBy(d => d.RelatingDocument).Select(p => new { x = p.Key, y = p.SelectMany(c => c.RelatedObjects) });
if (dupsMerge.Any())
{
//remove the duplicates and convert to dictionary
dic = doclist.Except(dups).ToDictionary(p => p.RelatingDocument, p => p.RelatedObjects);
//add the duplicate doc referenced object lists to the original doc
foreach (var item in dupsMerge)
{
dic[item.x] = dic[item.x].Union(item.y).ToList();
}
}
else
{
//no duplicates, so just convert to dictionary
dic = doclist.ToDictionary(p => p.RelatingDocument, p => p.RelatedObjects);
}
//reverse lookup to entity to list of documents
var newDic = dic
.SelectMany(pair => pair.Value
.Select(val => new { Key = val, Value = pair.Key }))
.GroupBy(item => item.Key)
.ToDictionary(gr => gr.Key, gr => gr.Select(item => item.Value));
Assert.AreEqual(newDic["Ent1"].Count(), 5);
Assert.AreEqual(newDic["Ent2"].Count(), 3);
Assert.AreEqual(newDic["Ent3"].Count(), 2);
Assert.AreEqual(newDic["Ent4"].Count(), 1);
Assert.AreEqual(newDic["Ent5"].Count(), 1);
Assert.AreEqual(newDic["Ent6"].Count(), 3);
Assert.AreEqual(newDic["Ent7"].Count(), 3);
Assert.AreEqual(newDic["Ent8"].Count(), 1);
Assert.AreEqual(newDic["Ent9"].Count(), 1);
Assert.AreEqual(newDic["Ent10"].Count(), 2);
Assert.AreEqual(newDic["Ent11"].Count(), 2);
}
static void Main()
{
var numbers = new[] { 3, 4, 4, 2, 3, 3, 4, 3, 2 };
var groupedByOccurence = numbers.GroupBy(x => x).OrderBy(x => x.Key);
foreach (var group in groupedByOccurence)
{
Console.WriteLine("{0} --> {1} times", group.Key, group.Count());
}
}
public static Matrix Generate(Node parentNode)
{
Dictionary<Node, int> offsets = new Dictionary<Node, int>();
int depth = parentNode.GetMaxDepth();
int height = depth * (Settings.DefaultHeight + Settings.RoomCoridorLenght);
var allNodes = new []{parentNode}.FancyFlatten(n => true, n => n.Nodes).ToArray();
int labyrinthWidth = parentNode.GetSize();
Matrix matrix = new Matrix(labyrinthWidth, height);
int yOffset = 0;
int xOffset = 0;
foreach (var levelGroup in allNodes.GroupBy(n => n.Level))
{
Node currentParent = null;
foreach (var group in levelGroup)
{
if (group.Parent != null)
{
if (currentParent != group.Parent)
{
yOffset = 0;
}
}
currentParent = group.Parent;
Room room = new Room(group.GetSize());
var parentOffset = 0;
if (group.Parent != null)
parentOffset = offsets[group.Parent];
matrix.Merge(room.AsMatrix(), yOffset + parentOffset, xOffset);
offsets.Add(group, yOffset + parentOffset);
yOffset += group.GetSize() + Settings.Scale;
}
xOffset += Settings.DefaultHeight + Settings.RoomCoridorLenght - 1;
yOffset = 0;
}
return matrix;
}
public static void Main()
{
var array = new[] { "C#", "SQL", "PHP", "PHP", "SQL", "SQL" };
var dictionary = array.GroupBy(s => s).ToDictionary(s => s.Key, s => s.Count());
var listofEvens = dictionary.Where(s => s.Value%2 == 0).Select(s => s.Key).ToList();
var listofOdds = dictionary.Where(s => s.Value%2 != 0).Select(s => s.Key).ToList();
Console.WriteLine(string.Format("Language/s with even number of appearance {0}", string.Join(", ", listofEvens)));
Console.WriteLine(string.Format("Language/s with odd number of appearance {0}", string.Join(", ", listofOdds)));
}
private static void f2()
{
//z2
//сгруппировать по чётности, для каждой группы посчитать сумму
//итоговая коллекция должна содержать поле суммы и группу
int[] a = new[] {3, 2, 8, 4, 2, 5, 3, 9, 1, 4, 2, 6, 7, 4, 7};
var n = a.GroupBy(x_ => x_%2 == 0).Select(ints => new {s = ints.Sum(), col = ints.ToArray()});
foreach (var el in n)
{
Console.WriteLine(el.s);
el.col.ToList().ForEach(x_ => Console.Write("{0} ", x_));
Console.WriteLine();
}
}
public static void Main()
{
var numbers = new[] { 3, 4, 4, 2, 3, 3, 4, 3, 2 };
var groupedNumbers = numbers.GroupBy(n => n).OrderBy(n => n.Key);
Console.WriteLine("List: [{0}]", string.Join(", ", numbers));
Console.WriteLine(new string('-', 30));
foreach (var numberGroup in groupedNumbers)
{
Console.WriteLine("{0} occurs {1} times", numberGroup.Key, numberGroup.Count());
}
}
static void Main()
{
// sample data with no majorant, uncomment this and comment the other sample if you want to test it
// var numbers = new[] { 3, 4, 4, 2, 3, 3, 4, 3, 2 };
// sample data with majorant
var numbers = new[] { 2, 2, 3, 3, 2, 3, 4, 3, 3 };
Console.WriteLine(string.Join(", ", numbers));
var groupedByOccurence = numbers.GroupBy(x => x).OrderByDescending(x => x.Count()).FirstOrDefault();
if (groupedByOccurence != null && groupedByOccurence.Count()> numbers.Count() / 2)
{
Console.WriteLine("Majorant --> {0} ({1} occurences)", groupedByOccurence.Key, groupedByOccurence.Count());
return;
}
Console.WriteLine("No majorant in the given sequence.");
}
public void Quesion3()
{
var data = new[] {
new Car{ Model="A", Colour="Blue"},
new Car{ Model="B", Colour="Blue"},
new Car{ Model="A", Colour="Red"},
new Car{ Model="C", Colour="Green"},
new Car{ Model="D", Colour="Blue"},
new Car{ Model="C", Colour="Red"},
};
var qry = data.GroupBy(c => c.Colour)
.Where(g => g.Count() > 1);
foreach (var result in qry)
{
Console.WriteLine("{0}-{1}", result.Key, result.Count());
}
}
private static void f3()
{
//z3
//дана коллекция пар - фамилия и сумма
//необходимо составить итоговую коллекцию - фамилия и сумма всех сумм для данной фамилии
KeyValuePair<string, int>[] kvp = new[]
{
new KeyValuePair<string, int>("Иванов", 2),
new KeyValuePair<string, int>("Петров", 3),
new KeyValuePair<string, int>("Иванов", 10),
new KeyValuePair<string, int>("Петров", 6),
new KeyValuePair<string, int>("Федоров", 1),
};
KeyValuePair<String, int> k = new KeyValuePair<string, int>("aa", 3);
var n3 = kvp.GroupBy(x_ => x_.Key).Select(pairs => new {name = pairs.Key, sum = pairs.Sum(pair => pair.Value)});
foreach (var el in n3)
{
Console.WriteLine(el);
}
}
static void Main(string[] args)
{
var books = new[]
{
new Book() {Name = "11", Year = 2010},
new Book() {Name = "12", Year = 2011}
};
IEnumerable<IGrouping<int, Book>> groups =
books.GroupBy(b => b.Year);
IEnumerable<IGrouping<int, Book>> yearGroups =
from book in books
from book2 in books
let year= book.Year-book2.Year
group book by book.Year
into g
select g;
var bookGroups =
from g in yearGroups
orderby g.Key descending
select new {Year = g.Key, Books = g, Count=g.Count()};
}
public void Should_return_an_empty_group_for_each_instance_of_the_separator()
{
var lines = new[] { "a", "a", "a" };
var grouped = lines.GroupBy("a");
grouped.Count.ShouldBeEqualTo(lines.Length);
grouped.First().Count.ShouldBeEqualTo(0);
grouped.Skip(1).First().Count.ShouldBeEqualTo(0);
grouped.Skip(2).First().Count.ShouldBeEqualTo(0);
}
public void SimpleGroupBy()
{
var source = new[] { "one", "two", "three", "four" };
var result = source.GroupBy(x => x.Count());
Assert.AreEqual(3, result.Count());
result.First(g=>g.Key == 3).AssertSequenceEqual("one","two");
result.First(g => g.Key == 4).AssertSequenceEqual("four");
result.First(g => g.Key == 5).AssertSequenceEqual("three");
}
public void GroupBy()
{
var items = new[]
{
new KeyValueClass { Key = "a", Value = 2 },
new KeyValueClass { Key = "a", Value = 1 },
new KeyValueClass { Key = "b", Value = 1 },
new KeyValueClass { Key = "c", Value = 3 },
new KeyValueClass { Key = "c", Value = 4 },
new KeyValueClass { Key = "c", Value = 1 },
};
var groups = items.GroupBy(x => x.Key).ToDictionary(x => x.Key, x => x.Select(y => y.Value).ToArray());
var a = groups["a"];
var b = groups["b"];
var c = groups["c"];
AssertEquals(a[0], 2);
AssertEquals(a[1], 1);
AssertEquals(b[0], 1);
AssertEquals(c[0], 3);
AssertEquals(c[1], 4);
AssertEquals(c[2], 1);
}
private void GroupingTest()
{
IEnumerable<Business> companies = new[]{
new Business{ Name = "XYZ Inc.", Settings = new[]{
new Setting{ Name="Age", Value="27"},
new Setting{ Name="Industry", Value="IT"}
}},
new Business{ Name = "Programmers++", Settings = new[]{
new Setting{ Name="Age", Value="27"},
new Setting{ Name="Industry", Value="IT"}
}},
new Business{ Name = "Jeff's Luxury Salmon", Settings = new[]{
new Setting{ Name="Age", Value="63"},
new Setting{ Name="Industry", Value="Sports"}
}},
new Business{ Name = "Bank of Khazakstan", Settings = new[]{
new Setting{ Name="Age", Value="30"},
new Setting{ Name="Industry", Value="Finance"}
}},
};
var groupSetting = "Industry";
var grouped = companies
.GroupBy(c => c.Settings.First(s => s.Name == groupSetting).Value);
foreach (var group in grouped)
{
//Console.WriteLine(group.Key);
foreach (var item in group.OrderBy(bus => bus.Name))
Console.WriteLine(" - " + item.Name);
}
}
private static void AddTypeToNamespaceNode(PropertyBag node, Type type)
{
object value;
var name = type.GetRootName();
if (!node.TryGetValue(name, out value))
{
node.SetPropertyNoCheck(name, HostType.Wrap(type));
return;
}
var hostType = value as HostType;
if (hostType != null)
{
var types = new[] { type }.Concat(hostType.Types).ToArray();
var groups = types.GroupBy(testType => testType.GetGenericParamCount()).ToIList();
if (groups.Any(group => group.Count() > 1))
{
types = groups.Select(ResolveTypeConflict).ToArray();
}
node.SetPropertyNoCheck(name, HostType.Wrap(types));
return;
}
if (value is PropertyBag)
{
throw new OperationCanceledException(MiscHelpers.FormatInvariant("Type conflicts with namespace at '{0}'", type.GetLocator()));
}
throw new OperationCanceledException(MiscHelpers.FormatInvariant("Type conflicts with '{0}' at '{1}'", value.GetFriendlyName(), type.GetLocator()));
}
public void Should_remove_the_whitespace_lines()
{
var lines = new[] { " ", "\t", "a", "\r", "\n" };
var grouped = lines.GroupBy("d");
grouped.Count.ShouldBeEqualTo(1);
grouped.First().Count.ShouldBeEqualTo(1);
grouped.First().ShouldContainAllInOrder(new[] { "a" });
}
public void Should_return_the_entire_input_in_a_single_group()
{
var lines = new[] { "a", "b", "c" };
var grouped = lines.GroupBy("d");
grouped.Count.ShouldBeEqualTo(1);
grouped.First().ShouldContainAllInOrder(lines);
}
public void Should_return_an_empty_group()
{
var lines = new[] { "a" };
var grouped = lines.GroupBy("a");
grouped.Count.ShouldBeEqualTo(lines.Length);
grouped.First().Count.ShouldBeEqualTo(0);
}
public void Should_return_the_data_in_one_group()
{
var lines = new[] { "a", "b", "c", "d", "e" };
var grouped = lines.GroupBy("c");
grouped.Count.ShouldBeEqualTo(2);
grouped.First().ShouldContainAllInOrder(new[] { "a", "b" });
grouped.Last().ShouldContainAllInOrder(new[] { "d", "e" });
}