Struct Equation

struct Equation {
    target: i64,
    total: i64,
    remaining_numbers: Vec<i64>,
}

An equation missing operators, stored as a target number, the running total and the numbers that have yet to be combined into to the total.

Fields

target: i64

total: i64

remaining_numbers: Vec<i64>

Implementations

impl Equation

fn new(target: i64, total: i64, remaining_numbers: Vec<i64>) -> Equation

Constructor

fn apply( &self, operation: fn(_: i64, _: i64) -> Option<i64>, ) -> Option<Equation>

Apply an operation, returns None if the operation does, or the total is now higher than the target, as operations can only increase the total

Trait Implementations

impl Clone for Equation

fn clone(&self) -> Equation

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Equation

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

Formats the value using the given formatter.

impl Ord for Equation

Ordering for the BinaryHeap. The best candidate equation has the greatest ordering. This is done by

• Fewest numbers remaining to combine
• The least distance from the running total to the target

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Equation

fn eq(&self, other: &Equation) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for Equation

PartialOrd needs to be implemented if Ord is implemented, but can delegate to it.

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for Equation

impl StructuralPartialEq for Equation