dsalgo 0.3.10

A package for Datastructures and Algorithms.
Documentation 
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use crate::binary_search_on_slice_bisection_of_ng_ok::binary_search;

pub fn lower_bound<T: PartialOrd>(
    monotonic_sequence: &[T],
    x: &T,
) -> usize {
    binary_search(&|y: &T| y >= x, monotonic_sequence)
}

#[cfg(test)]

mod tests {

    use super::*;

    #[test]

    fn test() {
        let v = (0..10).collect::<Vec<_>>();

        assert_eq!(lower_bound(&v, &-1), 0);

        assert_eq!(lower_bound(&v, &0), 0);

        assert_eq!(lower_bound(&v, &15), 10);
    }
}