frac_ have been replaced with any_, which take a logical value instead of a double value.character_letters generates character vectors with only letters.character_numbers generates character vectors with only numbers.character_alphanumeric generates character vectors with letters and numbers.flat_list_of generates lists of atomic scalars.data_frame_ generate data.frames.data_frame_of generate data.frames.data.table_ generate data.tables.data.table_of generate data.tables.anything generates any R object.any_flat_homogeneous_list generates flat lists with homogeneous elements.any_data_frame generates any data.frames.any_data.table generates any data.tables.any_undefined generates undefined values.equal_length generates equal length vectors.from_hedgehog converts a hedgehog to a quickcheck generator.as_hedgehog converts a quickcheck to a hedgehog generator.repeat_test tests a property repeatedly.Initial version