dsalgo 0.3.10

A package for Datastructures and Algorithms.
Documentation 
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pub struct CachedFibonacci<T> {
    fib: Vec<Option<T>>,
}

impl<T> CachedFibonacci<T> {
    pub fn new() -> Self {
        Self { fib: vec![] }
    }

    pub fn calc(
        &mut self,
        n: usize,
    ) -> T
    where
        T: From<u64> + Clone + std::ops::Add<Output = T>,
    {
        if self.fib.len() <= n {
            self.fib.extend(vec![None; n + 1 - self.fib.len()]);
        }

        if self.fib[n].is_some() {
            return self.fib[n].clone().unwrap();
        }

        match n {
            0 => self.fib[0] = Some(0.into()),
            1 => self.fib[1] = Some(1.into()),
            _ => {
                self.fib[n] = Some(self.calc(n - 1).clone() + self.calc(n - 2));
            }
        }

        self.fib[n].clone().unwrap()
    }
}

// TODO:
#[cfg(test)]

mod tests {

    #[test]

    fn test() {}
}