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Haversack\n[![Build Status](https://travis-ci.org/alex0112/haversack.svg?branch=master)](https://travis-ci.org/alex0112/haversack) [![Maintainability](https://api.codeclimate.com/v1/badges/7ff5206188bb44910d07/maintainability)](https://codeclimate.com/github/alex0112/haversack/maintainability)\n\n\nHaversack is an enumerable abstraction of a [Knapsack](https://en.wikipedia.org/wiki/Knapsack_problem).  Itis a proof of concept for a knapsack data structure, used for projects [like this one](https://rollout.io/blog/using-genetic-algorithms-in-ruby/).\n\n## Basic Usage:\n```ruby \nrequire 'haversack'\n\nhaversack = Sack.new(capacity: 10, weight: 10)\nitems     = Array.new(10) { Haversack::Item.new(weight: 1, size: 1) }\n\nhaversack.contents = items\n\n## Haversack provides constraints upon what items may be set as the knapsack contents:\ntoo_large = Array.new(haversack.capacity + 1) { Haversack::Item.new }\nhaversack.contents = too_large # =\u003e Haversack::KnapsackCapacityExceededError\n\n## Or you may add one item at a time\nitem = Haversack::Item.new\nhaversack.push(item) if haversack.fits_item? item\n\n```\n## Installation\n\nAdd this line to your application's Gemfile:\n\n```ruby\ngem 'haversack'\n```\n\nAnd then execute:\n\n    $ bundle\n\nOr install it yourself as:\n\n    $ gem install haversack\n\n\n## Development\n\nAfter checking out the repo, run `bin/setup` to install dependencies. 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