How to append unique numbers to a list of strings

Question

I have this function, which works and gives the correct result:

  
  Pu         


        

Answer 1

Here's the VB version:

  
  Public Function Unique(List As List(Of String)) As List(Of String)
    ' 1. Remember the initial order
    ' 2. Group by the text
    ' 3. Label the entries in each group
    ' 4. Now reorder them by their original order
    ' 5. Remove the order value to get back to just the name
    Return List.
      Select(Function(Item, Index) New With {Item, Index}).
      GroupBy(Function(IndexedItem) IndexedItem.Item).
      SelectMany(Function(Group) Group.Select(Function(GroupItem, GroupIndex) New With {.Index = GroupItem.Index, .UniqueItem = GroupItem.Item & If(GroupIndex = 0, String.Empty, (GroupIndex + 1).ToString)})).
      OrderBy(Function(IndexedUniqueItem) IndexedUniqueItem.Index).
      Select(Function(IndexedUniqueItem) IndexedUniqueItem.UniqueItem).
      ToList()
  End Function