Enum Column 

pub enum Column {
    Float(ArrayD<F>),
    Int(ArrayD<I>),
    Bool(ArrayD<bool>),
    UInt(ArrayD<U>),
    U8(ArrayD<u8>),
    String(ArrayD<String>),
}

Internal enum representing a column of data in a Block.

This type is exposed in the public API but users typically don’t need to interact with it directly. Instead, use the type-specific getters like get_float(), get_int(), etc.

Variants

Float(ArrayD<F>)

Floating point column using the compile-time scalar type F.

Int(ArrayD<I>)

Signed integer column using the compile-time scalar type I.

Bool(ArrayD<bool>)

Boolean column

UInt(ArrayD<U>)

Unsigned integer column using the compile-time scalar type U.

U8(ArrayD<u8>)

8-bit unsigned integer column

String(ArrayD<String>)

String column

Implementations

impl Column

pub fn nrows(&self) -> Option<usize>

Returns the number of rows (axis-0 length) of this column.

Returns None if the array has rank 0 (which should never happen in a valid Block, as rank-0 arrays are rejected during insertion).

pub fn dtype(&self) -> DType

Returns the data type of this column.

pub fn shape(&self) -> &[usize]

Returns the shape of the underlying array.

pub fn as_float(&self) -> Option<&ArrayD<F>>

Returns a reference to the float data, or None if this column is not Float.

pub fn as_float_mut(&mut self) -> Option<&mut ArrayD<F>>

Returns a mutable reference to the float data, or None if not Float.

pub fn as_int(&self) -> Option<&ArrayD<I>>

Returns a reference to the integer data, or None if not Int.

pub fn as_int_mut(&mut self) -> Option<&mut ArrayD<I>>

Returns a mutable reference to the integer data, or None if not Int.

pub fn as_bool(&self) -> Option<&ArrayD<bool>>

Returns a reference to the boolean data, or None if not Bool.

pub fn as_bool_mut(&mut self) -> Option<&mut ArrayD<bool>>

Returns a mutable reference to the boolean data, or None if not Bool.

pub fn as_uint(&self) -> Option<&ArrayD<U>>

Returns a reference to the unsigned integer data, or None if not UInt.

pub fn as_uint_mut(&mut self) -> Option<&mut ArrayD<U>>

Returns a mutable reference to the unsigned integer data, or None if not UInt.

pub fn as_u8(&self) -> Option<&ArrayD<u8>>

Returns a reference to the u8 data, or None if not U8.

pub fn as_u8_mut(&mut self) -> Option<&mut ArrayD<u8>>

Returns a mutable reference to the u8 data, or None if not U8.

pub fn as_string(&self) -> Option<&ArrayD<String>>

Returns a reference to the string data, or None if not String.

pub fn as_string_mut(&mut self) -> Option<&mut ArrayD<String>>

Returns a mutable reference to the string data, or None if not String.

pub fn resize(&mut self, new_nrows: usize)

Resize this column along axis 0 to new_nrows.

• If new_nrows < current nrows, slices to keep only the first new_nrows rows.
• If new_nrows > current nrows, extends with default values (0.0 for Float, 0 for Int/UInt/U8, false for Bool, empty string for String).
• If new_nrows == current nrows, this is a no-op.

Only axis 0 is modified; trailing dimensions are preserved.

Trait Implementations

impl Clone for Column

fn clone(&self) -> Column

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Column

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.