Method slice

arrow-array/src/array/struct_array.rs:331–345

Returns a zero-copy slice of this array with the indicated offset and length.

(&self, offset: usize, len: usize)

    /// Returns a zero-copy slice of this array with the indicated offset and length.
    pub fn slice(&self, offset: usize, len: usize) -> Self {
        assert!(
            offset.saturating_add(len) <= self.len,
            "the length + offset of the sliced StructArray cannot exceed the existing length"
        );

        let fields = self.fields.iter().map(|a| a.slice(offset, len)).collect();

        Self {
            len,
            data_type: self.data_type.clone(),
            nulls: self.nulls.as_ref().map(|n| n.slice(offset, len)),
            fields,
        }
    }

    /// Returns the children of this [`StructArray`] with the struct's validity
    /// bitmap AND'd into each child's validity bitmap.