What would be an efficient way to select float in a finite sized array that is more close to zero?

c++, floating-point, math

Solution

`std::min_element` has an overload that takes a comparison function object; that's what I'd use here:

float val = *std::min_element(std::begin(v), std::end(v),
    [](float a, float b) { return fabs(a) < fabs(b); } );

Problem

For each function, I get/have a finite sized array of floats that I need to pick. So if I have something like 1) ``` {-0.02, 0.5, 0.98, -0.15, etc... } ``` I would pick "-0.02" from this list. 2) ``` {-0.78, 0.003, 0.1, -1.8, etc... } ``` and now, I would pick "0.003" from this list. This is just an example. In my real program, I have floats with 5-6 decimal points.

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