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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,71 @@ | ||
| use crate::{map_owned_without_args, map_without_args}; | ||
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| use super::*; | ||
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| #[cfg(feature = "serde")] | ||
| use serde::{Deserialize, Serialize}; | ||
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| #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))] | ||
| #[derive(Clone, PartialEq, Debug, Eq, Hash)] | ||
| pub enum NanFunction { | ||
| IsNan, | ||
| IsNotNan, | ||
| DropNans, | ||
| } | ||
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| pub(super) fn is_nan(s: &Series) -> Result<Series> { | ||
| s.is_nan().map(|ca| ca.into_series()) | ||
| } | ||
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| pub(super) fn is_not_nan(s: &Series) -> Result<Series> { | ||
| s.is_not_nan().map(|ca| ca.into_series()) | ||
| } | ||
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| pub(super) fn drop_nans(s: Series) -> Result<Series> { | ||
| match s.dtype() { | ||
| DataType::Float32 => { | ||
| let ca = s.f32()?; | ||
| let mask = ca.is_not_nan(); | ||
| ca.filter(&mask).map(|ca| ca.into_series()) | ||
| } | ||
| DataType::Float64 => { | ||
| let ca = s.f64()?; | ||
| let mask = ca.is_not_nan(); | ||
| ca.filter(&mask).map(|ca| ca.into_series()) | ||
| } | ||
| _ => Ok(s), | ||
| } | ||
| } | ||
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| impl NanFunction { | ||
| pub(crate) fn get_field(&self, fields: &[Field]) -> Result<Field> { | ||
| let with_dtype = |dtype: DataType| Ok(Field::new(fields[0].name(), dtype)); | ||
| let map_dtype = |func: &dyn Fn(&DataType) -> DataType| { | ||
| let dtype = func(fields[0].data_type()); | ||
| Ok(Field::new(fields[0].name(), dtype)) | ||
| }; | ||
| let same_type = || map_dtype(&|dtype| dtype.clone()); | ||
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| match self { | ||
| NanFunction::IsNan => with_dtype(DataType::Boolean), | ||
| NanFunction::IsNotNan => with_dtype(DataType::Boolean), | ||
| NanFunction::DropNans => same_type(), | ||
| } | ||
| } | ||
| } | ||
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| impl From<NanFunction> for SpecialEq<Arc<dyn SeriesUdf>> { | ||
| fn from(nan_function: NanFunction) -> Self { | ||
| match nan_function { | ||
| NanFunction::IsNan => map_without_args!(is_nan), | ||
| NanFunction::IsNotNan => map_without_args!(is_not_nan), | ||
| NanFunction::DropNans => map_owned_without_args!(drop_nans), | ||
| } | ||
| } | ||
| } | ||
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| impl From<NanFunction> for FunctionExpr { | ||
| fn from(nan_function: NanFunction) -> Self { | ||
| FunctionExpr::Nan(nan_function) | ||
| } | ||
| } |
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