question: private double match_bitapScore ( int e , int x , int loc , String pattern ) { float accuracy = ( float ) e / pattern . length ( ) ; int proximity = Math . abs ( loc - x ) ; if ( Match_Distance == 0 ) { return proximity == 0 ? accuracy : 1.0 ; } return accuracy + ( proximity / ( float ) Match_Distance ) ; }
target:  Compute and return the score for a match with e errors and x location.