Struct polars::datatypes::Utf8Type

pub struct Utf8Type {}

Trait Implementations

impl ChunkCumAgg<Utf8Type> for ChunkedArray<Utf8Type>

fn cum_max(&self, _reverse: bool) -> ChunkedArray<T>

Get an array with the cumulative max computed at every element

fn cum_min(&self, _reverse: bool) -> ChunkedArray<T>

Get an array with the cumulative min computed at every element

fn cum_sum(&self, _reverse: bool) -> ChunkedArray<T>

Get an array with the cumulative sum computed at every element

impl ChunkExpandAtIndex<Utf8Type> for ChunkedArray<Utf8Type>

pub fn expand_at_index(
    &self,
    index: usize,
    length: usize
) -> ChunkedArray<Utf8Type>

Create a new ChunkedArray filled with values at that index.

impl ChunkFilter<Utf8Type> for ChunkedArray<Utf8Type>

pub fn filter(
    &self,
    filter: &ChunkedArray<BooleanType>
) -> Result<ChunkedArray<Utf8Type>, PolarsError>

Filter values in the ChunkedArray with a boolean mask.

impl ChunkReverse<Utf8Type> for ChunkedArray<Utf8Type>

pub fn reverse(&self) -> ChunkedArray<Utf8Type>

Return a reversed version of this array.

impl ChunkShift<Utf8Type> for ChunkedArray<Utf8Type>

pub fn shift(&self, periods: i64) -> ChunkedArray<Utf8Type>

impl<'_> ChunkShiftFill<Utf8Type, Option<&'_ str>> for ChunkedArray<Utf8Type>

pub fn shift_and_fill(
    &self,
    periods: i64,
    fill_value: Option<&str>
) -> ChunkedArray<Utf8Type>

Shift the values by a given period and fill the parts that will be empty due to this operation with fill_value.

impl ChunkSort<Utf8Type> for ChunkedArray<Utf8Type>

pub fn argsort_multiple(
    &self,
    other: &[Series],
    reverse: &[bool]
) -> Result<ChunkedArray<UInt32Type>, PolarsError>

Panics

This function is very opinionated. On the implementation of ChunkedArray<T> for numeric types, we assume that all numeric Series are of the same type.

In this case we assume that all numeric Series are f64 types. The caller needs to uphold this contract. If not, it will panic.

pub fn sort(&self, reverse: bool) -> ChunkedArray<Utf8Type>

Returned a sorted ChunkedArray.

pub fn sort_in_place(&mut self, reverse: bool)

Sort this array in place.

pub fn argsort(&self, reverse: bool) -> ChunkedArray<UInt32Type>

Retrieve the indexes needed to sort this array.

impl ChunkTakeEvery<Utf8Type> for ChunkedArray<Utf8Type>

pub fn take_every(&self, n: usize) -> ChunkedArray<Utf8Type>

Traverse and collect every nth element in a new array.

impl ChunkUnique<Utf8Type> for ChunkedArray<Utf8Type>

pub fn unique(&self) -> Result<ChunkedArray<Utf8Type>, PolarsError>

Get unique values of a ChunkedArray

pub fn arg_unique(&self) -> Result<ChunkedArray<UInt32Type>, PolarsError>

Get first index of the unique values in a ChunkedArray. This Vec is sorted.

pub fn is_unique(&self) -> Result<ChunkedArray<BooleanType>, PolarsError>

Get a mask of all the unique values.

pub fn is_duplicated(&self) -> Result<ChunkedArray<BooleanType>, PolarsError>

Get a mask of all the duplicated values.

pub fn value_counts(&self) -> Result<DataFrame, PolarsError>

Count the unique values.

pub fn n_unique(&self) -> Result<usize, PolarsError>

Number of unique values in the ChunkedArray

pub fn mode(&self) -> Result<ChunkedArray<Utf8Type>, PolarsError>

The most occurring value(s). Can return multiple Values

impl ChunkZip<Utf8Type> for ChunkedArray<Utf8Type>

pub fn zip_with(
    &self,
    mask: &ChunkedArray<BooleanType>,
    other: &ChunkedArray<Utf8Type>
) -> Result<ChunkedArray<Utf8Type>, PolarsError>

Create a new ChunkedArray with values from self where the mask evaluates true and values from other where the mask evaluates false

impl<'_> ChunkedBuilder<Cow<'_, str>, Utf8Type> for Utf8ChunkedBuilderCow

pub fn append_value(&mut self, val: Cow<'_, str>)

pub fn append_null(&mut self)

pub fn finish(self) -> ChunkedArray<Utf8Type>

fn append_option(&mut self, opt_val: Option<N>)

impl IsFirst<Utf8Type> for ChunkedArray<Utf8Type>

pub fn is_first(&self) -> Result<ChunkedArray<BooleanType>, PolarsError>

impl<S> NewChunkedArray<Utf8Type, S> for ChunkedArray<Utf8Type> where
    S: AsRef<str>, 

pub fn new_from_iter(
    name: &str,
    it: impl Iterator<Item = S>
) -> ChunkedArray<Utf8Type>

Create a new ChunkedArray from an iterator.

pub fn new_from_slice(name: &str, v: &[S]) -> ChunkedArray<Utf8Type>

pub fn new_from_opt_slice(
    name: &str,
    opt_v: &[Option<S>]
) -> ChunkedArray<Utf8Type>

pub fn new_from_opt_iter(
    name: &str,
    it: impl Iterator<Item = Option<S>>
) -> ChunkedArray<Utf8Type>

Create a new ChunkedArray from an iterator.

impl PolarsDataType for Utf8Type

pub fn get_dtype() -> DataType

impl ToDummies<Utf8Type> for ChunkedArray<Utf8Type>

pub fn to_dummies(&self) -> Result<DataFrame, PolarsError>

impl PolarsSingleType for Utf8Type