Cheryl's birthday: Difference between revisions
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End Sub</lang>{{out}}
<pre>July 16</pre>
=={{header|Visual Basic .NET}}==
{{trans|C#}}
<lang vbnet>Module Module1
Structure MonDay
Dim month As String
Dim day As Integer
Sub New(m As String, d As Integer)
month = m
day = d
End Sub
Public Overrides Function ToString() As String
Return String.Format("({0}, {1})", month, day)
End Function
End Structure
Sub Main()
Dim dates = New HashSet(Of MonDay) From {
New MonDay("May", 15),
New MonDay("May", 16),
New MonDay("May", 19),
New MonDay("June", 17),
New MonDay("June", 18),
New MonDay("July", 14),
New MonDay("July", 16),
New MonDay("August", 14),
New MonDay("August", 15),
New MonDay("August", 17)
}
Console.WriteLine("{0} remaining.", dates.Count)
' The month cannot have a unique day.
Dim monthsWithUniqueDays = dates.GroupBy(Function(d) d.day).Where(Function(g) g.Count() = 1).Select(Function(g) g.First().month).ToHashSet()
dates.RemoveWhere(Function(d) monthsWithUniqueDays.Contains(d.month))
Console.WriteLine("{0} remaining.", dates.Count)
' The day must now be unique.
dates.IntersectWith(dates.GroupBy(Function(d) d.day).Where(Function(g) g.Count() = 1).Select(Function(g) g.First()))
Console.WriteLine("{0} remaining.", dates.Count)
' The month must now be unique.
dates.IntersectWith(dates.GroupBy(Function(d) d.month).Where(Function(g) g.Count() = 1).Select(Function(g) g.First()))
Console.WriteLine(dates.Single())
End Sub
End Module</lang>
{{out}}
<pre>10 remaining.
5 remaining.
3 remaining.
(July, 16)</pre>
=={{header|zkl}}==
<lang zkl>dates:=T(T("May", 15), T("May", 16), T("May", 19),
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