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(Updated Again) Check for duplicates in an array!

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Submitted on: 1/2/2015 11:36:00 PM
By: Arthur Chaparyan3 (from psc cd)  
Level: Not Given
User Rating: By 8 Users
Compatibility: VB 4.0 (16-bit), VB 4.0 (32-bit), VB 5.0, VB 6.0
Views: 8814
 
     I've been looking around for this code and no one could provide it. So finally I wrote it. It checks for duplicates in an array and returns true if there are any.
 
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'**************************************
' Name: (Updated Again) Check for duplicates in an array!
' Description:I've been looking around for this code and no one could provide it. So finally I wrote it. It checks for duplicates in an array and returns true if there are any.
' By: Arthur Chaparyan3 (from psc cd)
'
' Inputs:The only input required is the array
'
' Returns:Returns True if there are any duplicates and false otherwise
'
' Assumes:You could use this code to generate lottery numbers or check if more than one record of the same name is present...
'
' Side Effects:If used with LARGE (and I mean LARGE as in arrays with hundreds or thousands of items) it will slow down. USE WITH ONE DIMENSIONAL ARRAYS
'**************************************

Public Function AnyDup(NumList As Variant) As Boolean
 Dim a As Long, b As Long
 'Start the first loop
 For a = LBound(NumList) To UBound(NumList)
 'Start the second loop (thanks for the suggestions everyone)
 For b = a + 1 To UBound(NumList)
 'Check if the values are the same
 'if they're equal, then we found a duplicate
 'tell the user and end the function
 If NumList(a) = NumList(b) Then AnyDup = True: Exit Function
 Next
 Next
End Function


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