question: public boolean equals ( int ignoreOwnElement , Sequence sequence , int ignoreItsElement ) { int ownIndex = 0 ; int itsIndex = 0 ; Iterator < Item > ownIterator = itemIterator ( ) ; Iterator < Item > itsIterator = sequence . itemIterator ( ) ; while ( true ) { if ( ignoreOwnElement == ownIndex ) { ownIterator . next ( ) ; ownIndex ++ ; } if ( ignoreItsElement == itsIndex ) { itsIterator . next ( ) ; itsIndex ++ ; } if ( ! ownIterator . hasNext ( ) || ! itsIterator . hasNext ( ) ) { if ( ! ownIterator . hasNext ( ) && ! itsIterator . hasNext ( ) ) { return true ; } return false ; } Item ownItem = ownIterator . next ( ) ; Item itsItem = itsIterator . next ( ) ; ownIndex ++ ; itsIndex ++ ; if ( ! ownItem . equals ( itsItem ) ) { return false ; } } }
target:  This method implements an enhanced equals method where the specified elements of the sequences are treated as if not existent. This avoids construction of new sequences.