StackOverflow2013

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Id
5459210
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0
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2011-03-28T12:48:32.257
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0
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2011-03-28T12:48:32.257
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66532
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5452127
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2
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<p>A generic lottery</p> <pre><code>Private Sub Button1_Click(sender As System.Object, _ e As System.EventArgs) Handles Button1.Click Dim myLotto As New Lottery(49) 'fill the hopper myLotto.Draw(6) 'draw the balls Debug.WriteLine(myLotto.ToString) 'get the results 'OR get the results one item at a time For x As Integer = 0 To myLotto.Count - 1 Debug.WriteLine(myLotto.Item(x)) Next End Sub Class Lottery Private Shared PRNG As New Random Private _theHopper As List(Of Integer) Private _draw As List(Of Integer) Public Sub New(maxNumber As Integer) Me.MaxNumber = maxNumber Me._theHopper = New List(Of Integer) Me._theHopper.AddRange(Enumerable.Range(1, Me.MaxNumber).ToArray) End Sub Private _maxNumber As Integer Public Property MaxNumber() As Integer Get Return Me._maxNumber End Get Set(ByVal value As Integer) Me._maxNumber = value End Set End Property Public Sub Draw(numberOfBalls As Integer, _ Optional DuplicatesAllowed As Boolean = False) Me._draw = New List(Of Integer) Dim whichNum As Integer For ct As Integer = 1 To numberOfBalls whichNum = PRNG.Next(Me._theHopper.Count) Me._draw.Add(Me._theHopper(whichNum)) If Not DuplicatesAllowed Then Me._theHopper.RemoveAt(whichNum) Next End Sub Public Overrides Function ToString() As String If Me._draw Is Nothing Then Return Nothing Else Dim sb As New System.Text.StringBuilder For Each num As Integer In Me._draw sb.Append(num) sb.Append(" ") Next Return sb.ToString End If End Function Public ReadOnly Property Count() As Integer Get Return Me._draw.Count End Get End Property Public Function Item(itemNum As Integer) As Integer Return Me._draw(itemNum) End Function End Class </code></pre>
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1. POProblem Exception and Random number
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1. USdbasnett
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1. POProblem Exception and Random number
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