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Tip of the Day
Language: Visual Basic
Expertise: Beginner
Nov 13, 1998

Deleting an Array Element

Conventional wisdom suggests that to delete an array element, you must move up all the subsequent elements to close the "gap" left by the deleted item. However, if the sequence of the elements isn't significant (as in an unsorted array), this algorithm quickly deletes an item:
 
' Element to delete
iDelete = 5
' Number of elements before deletion
nElements = UBound(Array)
' Replace iDelete with last item in array
Array(iDelete) = Array(nElements)
' Use ReDim Preserve to shrink array by one
ReDim Preserve Array(LBound(Array) _ 
	To nElements - 1)
Basil Hubbard
 
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