question: public static float [ ] insert ( float [ ] field , int index , int size , float ... values ) { if ( index < size ) { field = rshift ( field , index , ( size - index ) , values . length , true ) ; } else { field = expand ( field , ( size + values . length ) , true ) ; index = size ; } System . arraycopy ( values , 0 , field , index , values . length ) ; return field ; }
target:  Inserts entries into an array at a specific position. The array will be expanded if needed