question: gets the length of an array . it will return null under the following conditions : array is null . array is not an array . concode_field_sep PlaceHolder placeHolder concode_field_sep Object set concode_elem_sep Object get concode_elem_sep Object clone concode_elem_sep boolean isArray concode_elem_sep List list
target: Integer function ( Object arg0 ) { if ( ! this . isArray ( arg0 ) ) { return null ; } return new Integer ( Array . getLength ( arg0 ) ) ; }