Struct binomial_iter::BinomialIter
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pub struct BinomialIter { /* fields omitted */ }Provides methods to calculate the binomial coefficient for the next
higher/lower n/k.
Methods
impl BinomialIter[src]
fn new(n: u32, k: u32) -> BinomialIter
Create a new BinomialIter. This will calculate the binomial
coefficient once using the recursive definition.
Panics
If k > n
fn n(&self) -> u32
Access the current value of n.
fn k(&self) -> u32
Access the current value of k.
fn binom(&self) -> u32
Access the current value of n choose k.
fn inc_n(&mut self) -> Option<(u32, u32)>
Increase n by one and update the internal state accordingly.
Returns None when calculating n + 1 choose k would overflow,
otherwise Some((n + 1, binom)).
fn dec_n(&mut self) -> Option<(u32, u32)>
Decrease n by one and update the internal state accordingly.
Returns None when calculating n - 1 choose k would overflow or
n - 1 < k, otherwise Some((n - 1, binom)).
fn inc_k(&mut self) -> Option<(u32, u32)>
Increase k by one and update the internal state accordingly.
Returns None when calculating n choose k + 1 would overflow or
n < k + 1, otherwise Some((k + 1, binom)).
fn dec_k(&mut self) -> Option<(u32, u32)>
Decrease k by one and update the internal state accordingly.
Returns None when calculating n choose k - 1 would overflow or
k - 1 < 0, otherwise Some((k - 1, binom))
impl BinomialIter[src]
fn iter_inc_n(self) -> IncNIter
Returns an iterator which wraps this BinomialIter, returns the current
value of n and binom on the first call to next and the result of
calling inc_n on the underlying BinominalIter for subsequent calls
to next.
impl BinomialIter[src]
fn iter_dec_n(self) -> DecNIter
Returns an iterator which wraps this BinomialIter, returns the current
value of n and binom on the first call to next and the result of
calling dec_n on the underlying BinominalIter for subsequent calls
to next.
impl BinomialIter[src]
fn iter_inc_k(self) -> IncKIter
Returns an iterator which wraps this BinomialIter, returns the current
value of k and binom on the first call to next and the result of
calling inc_k on the underlying BinominalIter for subsequent calls
to next.
impl BinomialIter[src]
fn iter_dec_k(self) -> DecKIter
Returns an iterator which wraps this BinomialIter, returns the current
value of k and binom on the first call to next and the result of
calling dec_k on the underlying BinominalIter for subsequent calls
to next.
Trait Implementations
impl Copy for BinomialIter[src]
impl Clone for BinomialIter[src]
fn clone(&self) -> BinomialIter
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)1.0.0
Performs copy-assignment from source. Read more
impl PartialEq for BinomialIter[src]
fn eq(&self, __arg_0: &BinomialIter) -> bool
This method tests for self and other values to be equal, and is used by ==. Read more
fn ne(&self, __arg_0: &BinomialIter) -> bool
This method tests for !=.