TListAssignOp

type TListAssignOp = (

  laCopy,

Clear list and copy all strings from second list.

  laAnd,

Remove all elements not first second list.

  laOr,

Add all elements from second (and optional third) list, eliminate duplicates.

  laXor,

Remove elements in second lists, Add all elements from second list not in first list.

  laSrcUnique,

Just keep all elements that exist only in source list.

  laDestUnique

Keep all elements that exists only in list2.

);

TList.Assign

Copy the contents of other lists.

TFPList.assign

Assign performs the given operation on the list.