weight_conversion

WeightConversion (0.2.0)

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Weight object for converting from grams, ounces, pounds and kilograms into a common unit.

Based on Anton Shemerey's Weight gem (https://github.com/shemerey/weight)

Installation

Add this line to your application's Gemfile:

$ gem 'weight_conversion'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install weight_conversion

Usage

Basic Conversion

 Weight.new(1, :lb).to_kgs # => 0.4536
 Weight.new(1, :kg).to_mgs # => 1000.0

Basic Math with Weight objects

 Weight.new(1, :kg) + Weight.new(1, :kg) == Weight.new(2, :kg)
 Weight.new(1, :kg) - Weight.new(1, :kg) == Weight.new(0, :kg)

 Weight.new(1, :kg) * 2 == Weight.new(2, :kg)
 Weight.new(2, :kg) / 2 == Weight.new(1, :kg)

Convert result to the first object unit system

 Weight.new(1, :kg) + Weight.new(1, :lb) # =>   #<Weight: @input_value=1.4536, @input_unit=:kg>
 Weight.new(1, :lb) + Weight.new(1, :kg) # =>   #<Weight: @input_value=3.2046, @input_unit=:lb>

Basic comparison with Weight objects

 Weight.new(3, :lb).between?(Weight.new(1, :kg), Weight.new(2, :kg))
 Weight.new(1, :kg) > Weight.new(2, :lb)
 Weight.new(1, :lb) <= Weight.new(0.5, :kg)

Contributing

1. Fork it ( https://github.com/[my-github-username]/weight_conversion/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