Get base unit from value

[everdrone]

Is there a way of getting the base unit of measure from a user provided value?

For example: base_unit_of(43kΩ) will return ohm.

[sharkdp]

There is currently no way to do this. What is your use case?

[everdrone]

I need to normalize a value of arbitrary type (ElectricResistance, Inductance, Capacitance) and I need the "raw" value behind the type. Essentially, given 10kΩ i need 10_000, or 1nF -> 1e-9. For that I use value / reference where reference is the base type ohm or farad.
Is there a better way of doing this?

# Find the power of 10 (decade) for a given resistance value
fn _power_of_10<D: Dim>(resistance: D, reference: D) -> Scalar =
    floor(log10(resistance / reference))

fn _normalize<D: Dim>(value: D, reference: D) -> Scalar =
    (value / reference) / 10^_power_of_10(value, reference)

[sharkdp]

Yeah, that makes sense. I don't think we have anything to help you with this use case, but it seems reasonable to add a new FFI function with that functionality.

[sharkdp]

See #821

[sharkdp]

This is now possible in the latest release.

[everdrone]

neat! thank you!