Trait Number

pub trait Number<V>
where
    V: Clone + Eq + Hash,
{
    // Required methods
    fn new(numberer: Numberer<V>) -> Self;
    fn len(&self) -> usize;
    fn number(&self, value: V) -> Option<usize>;
    fn value(&self, number: usize) -> Option<V>;
}

Number a categorical variable.

Required Methods

fn new(numberer: Numberer<V>) -> Self

Construct a numberer for categorical variables.

fn len(&self) -> usize

Get the number of possible values in the categorical variable.

This includes reserved numerical representations that do not correspond to values in the categorial variable.

fn number(&self, value: V) -> Option<usize>

Get the number of a value from a categorical variable.

Mutable implementations of this trait must add the value if it is unknown and always return Option::Some.

fn value(&self, number: usize) -> Option<V>

Get the value corresponding of a number.

Returns Option::None if the number is unknown or a reserved number.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<V> Number<V> for ImmutableNumberer<V>

where V: Clone + Eq + Hash,

impl<V> Number<V> for MutableNumberer<V>

where V: Clone + Eq + Hash,