Find closest utility functions

// global functions

template <typename Container>
std::optional<std::pair<typename Container::key_type, typename Container::mapped_type>> mrpt::containers::find_closest_with_tolerance(
    const Container& data,
    const double x,
    double tolerance
    );

template <typename Container>
std::optional<std::pair<typename Container::key_type, typename Container::mapped_type>> mrpt::containers::find_closest(
    const Container& data,
    const double x
    );

Global Functions

template <typename Container>
std::optional<std::pair<typename Container::key_type, typename Container::mapped_type>> mrpt::containers::find_closest_with_tolerance(
    const Container& data,
    const double x,
    double tolerance
    )

For an associate container Container mapping real number keys to T values, searchs for the closest key within a given tolerance, that is, the key closest to x within the interval [x-tolerace, x+tolerance].

An empty std::optional is returned if none is found.

Computational cost: O(log(N)+M) with N the total size of the container, M the worst-case number of items in any interval of width 2*tolerance.

(New in MRPT 2.5.0)

See also:

find_closest()

template <typename Container>
std::optional<std::pair<typename Container::key_type, typename Container::mapped_type>> mrpt::containers::find_closest(
    const Container& data,
    const double x
    )

For an associate container Container mapping real number keys to T values, searchs for the closest key within a given tolerance, that is, the key closest to x within the interval [x-tolerace, x+tolerance].

An empty std::optional is returned if none is found, i.e. if the container was empty.

Computational cost: O(log(N)) with N the total size of the container.

(New in MRPT 2.5.0)