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report z.CLASS demo DEFINITION.  PUBLIC SECTION.    CLASS-METHODS main.ENDCLASS.CLASS demo IMPLEMENTATION.  METHOD main.    DATA      itab TYPE STANDARD TABLE OF i           WITH EMPTY KEY           WITH NON-UNIQUE SORTED KEY sort_key COMPONENTS table_line.    itab = VALUE #( ( 2 ) ( 5 ) ( 1 ) ( 3 ) ( 4 ) ).    DATA(output) =      REDUCE string(        INIT o = ``        FOR  i = lines( itab ) THEN i - 1 WHILE i > 0        NEXT o = o && COND #( LET r = itab[ KEY sort_key INDEX i ] IN                              WHEN r > 2 THEN r && ` ` ELSE r ) ).    cl_demo_output=>display( output ).  ENDMETHOD.ENDCLASS.START-OF-SELECTION.  demo=>main( ).

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