s-osa/emmental

Sparse table gem

Emmental

Gem to build a sparse rectangle array.

Installation

Add this line to your application's Gemfile:

gem 'emmental'

And then execute:

$ bundle

Or install it yourself as:

$ gem install emmental

Usage

Basic

emmental = Emmental.new

emmental << {foo: 1, bar: 2}
emmental << {fizz: 3, "buzz" => 5}
emmental << {foo: 1}

emmental.to_a # =>
# [
#   [:foo, :bar, :fizz, "buzz"],
#   [1, 2, nil, nil],
#   [nil, nil, 3, 5],
#   [1, nil, nil, nil]
# ]

Default headers

emmental = Emmental.new(["a", "b", "c"])

Array without headers

emmental.to_a(headers: false)

Contributing

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