RangeArray

This is a very simple subclass of the Array class, aimed specifically at supporting Ranges, rather than general objects.

When a new range is added to the array (using the << method), the RangeArray ensures that there are no overlapping ranges, and if necessary, merges any overlapping ranges into a single range.

For example, if the RangeArray holds the ranges (1..10) and (20..30), appending the range (5..25) will merge all ranges into a single range (1..30).

At this stage, only the << has been overridden, so no other methods are checked to guard against non-range members.

Add this line to your application's Gemfile:

gem 'range_array'

And then execute:

$ bundle

Or install it yourself as:

$ gem install range_array

In your Gemfile:

gem 'range_array'

Simple example:

require 'range_array'
ra = RangeArray.new
ra << (1..10)  # [(1..10)]
ra << (20..30) # [(1..10), (20..30)]
ra << (5..25)  # [(1..30)]

Also works for dates:

require 'range_array'
require 'date'
ra = RangeArray.new
ra << (Date.parse('2013-01-01') .. Date.parse('2013-05-01'))
ra << (Date.parse('2013-10-01') .. Date.parse('2013-12-31'))
ra << (Date.parse('2013-04-01') .. Date.parse('2013-11-01')) # [('2013-01-01' .. '2013-12-31')]

1. Fork it
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 new Pull Request