polars_core/scalar/
mod.rsmod from;
pub mod reduce;
use polars_utils::pl_str::PlSmallStr;
#[cfg(feature = "serde")]
use serde::{Deserialize, Serialize};
use crate::datatypes::{AnyValue, DataType};
use crate::prelude::{Column, Series};
#[derive(Clone, Debug, PartialEq)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
pub struct Scalar {
dtype: DataType,
value: AnyValue<'static>,
}
impl Default for Scalar {
fn default() -> Self {
Self {
dtype: DataType::Null,
value: AnyValue::Null,
}
}
}
impl Scalar {
#[inline(always)]
pub fn new(dtype: DataType, value: AnyValue<'static>) -> Self {
Self { dtype, value }
}
#[inline(always)]
pub fn is_null(&self) -> bool {
self.value.is_null()
}
#[inline(always)]
pub fn is_nan(&self) -> bool {
self.value.is_nan()
}
#[inline(always)]
pub fn value(&self) -> &AnyValue<'static> {
&self.value
}
pub fn as_any_value(&self) -> AnyValue {
self.value
.strict_cast(&self.dtype)
.unwrap_or_else(|| self.value.clone())
}
pub fn into_series(self, name: PlSmallStr) -> Series {
Series::from_any_values_and_dtype(name, &[self.as_any_value()], &self.dtype, true).unwrap()
}
pub fn into_column(self, name: PlSmallStr) -> Column {
Column::new_scalar(name, self, 1)
}
#[inline(always)]
pub fn dtype(&self) -> &DataType {
&self.dtype
}
#[inline(always)]
pub fn update(&mut self, value: AnyValue<'static>) {
self.value = value;
}
}