convert_and_bound_idx_ca

polars::prelude

Function convert_and_bound_idx_ca 

Source 
pub fn convert_and_bound_idx_ca<T>(
    ca: &ChunkedArray<T>,
    target_len: usize,
    null_on_oob: bool,
) -> Result<ChunkedArray<UInt32Type>, PolarsError>
where
    T: PolarsIntegerType,
    <T as PolarsNumericType>::Native: ToPrimitive,
Available on crate feature polars-ops only.
Expand description

UNSIGNED conversion:

  • 0 <= v < target_len → Some(v)
  • v >= target_len → None

SIGNED conversion with Python-style negative semantics:

  • v < -target_len → None
  • -target_len <= v < 0 → Some(target_len + v)
  • 0 <= v < target_len → Some(v)
  • v >= target_len → None