Trait std::iter::MultiplicativeIteratorExperimental
[-]
[+]
[src]
pub trait MultiplicativeIterator<A> { fn product(self) -> A; }
A trait for iterators over elements which can be multiplied together.
Required Methods
fn product(self) -> A
Iterates over the entire iterator, multiplying all the elements
Example
fn main() { use std::iter::{count, MultiplicativeIterator}; fn factorial(n: uint) -> uint { count(1u, 1).take_while(|&i| i <= n).product() } assert!(factorial(0) == 1); assert!(factorial(1) == 1); assert!(factorial(5) == 120); }use std::iter::{count, MultiplicativeIterator}; fn factorial(n: uint) -> uint { count(1u, 1).take_while(|&i| i <= n).product() } assert!(factorial(0) == 1); assert!(factorial(1) == 1); assert!(factorial(5) == 120);
Implementors
impl<T: Iterator<i8>> MultiplicativeIterator<i8> for T
impl<T: Iterator<i16>> MultiplicativeIterator<i16> for T
impl<T: Iterator<i32>> MultiplicativeIterator<i32> for T
impl<T: Iterator<i64>> MultiplicativeIterator<i64> for T
impl<T: Iterator<int>> MultiplicativeIterator<int> for T
impl<T: Iterator<u8>> MultiplicativeIterator<u8> for T
impl<T: Iterator<u16>> MultiplicativeIterator<u16> for T
impl<T: Iterator<u32>> MultiplicativeIterator<u32> for T
impl<T: Iterator<u64>> MultiplicativeIterator<u64> for T
impl<T: Iterator<uint>> MultiplicativeIterator<uint> for T
impl<T: Iterator<f32>> MultiplicativeIterator<f32> for T
impl<T: Iterator<f64>> MultiplicativeIterator<f64> for T