MeasureScaler

Simple gem to deal with measure scaling.

A couple of examples:

include MeasureScaler

m = Measure.new(12300.456789, "MWh")
m.scale.to_s # => "12.300456789 GWh"

You can add precision:

Measure.new(12300.456789, "MWh", 4).scale.to_s # => "12.3 GWh"
Measure.new(12300.456789, "MWh", 5).scale.to_s # => "12.3 GWh"
Measure.new(12300.456789, "MWh", 6).scale.to_s # => "12.3005 GWh"

It works with arrays too:

Measure.new([20_000, 15_000, 8_934], "MWh").scale.qty # => [20.0, 15.0, 8.934]
Measure.new([20_000, 15_000, 8_934], "MWh").scale.unit.to_s # => "GWh"

And works with 'reverse' unit of measure...

Measure.new(12300.456789, "€/kWh", 4).scale.to_s # => "12.3 €/Wh"

You can define your measure pattern with regexp:

PatternDefinitions.config do
  add /^(€\/)(.?)(Wh)$/
  add /^(.?)(Wh)$/
end

Installation

Add this line to your application's Gemfile:

gem 'measure_scaler'

And then execute:

$ bundle

Or install it yourself as:

$ gem install measure_scaler

Contributing

1. Fork it ( https://github.com/iwan/measure_scaler/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request