Make adding units with SI prefixes simpler about measured HOT 3 CLOSED

What range would this go to by default? 10⁹ to 10^-9 or even more?

from measured.

I have started on this, and I don't know if the approach I am taking is good.

I was going to create a class Measured::SIUnitSystemBuilder
with def si_unit(unit_name, aliases: [], value: nil, range = 9)
The class would have two arrays, each with every 3 prefixes, and they can be as long as needed
[:k, :M, :G], and [:m, :μ, :n] would be snippets of them

Then something would iterate over these and call build_unit them, with default aliases "#{unit_name}s"
And set the value of the unit relative to the si base unit.

Am I on the right track here?
Also, I wasn't sure why with_si_prefixes: true is needed. Can't si_unit build the base unit, as well as ones with all of the prefixes?

from measured.

From browsing around the web it looks like there are 20 prefixes (see Wikipedia, for example), so I'd go with those.

I'll address your other questions in your (wip) PR!

from measured.