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DataStructures101 is a simple gem that groups several implementations of common data structures usually taught in Computer Science courses. The overall goal of the gem is to provide easy to use functionality (trying to match the behavior of existing structures in Ruby) while providing the user with a framework to test and compare their implementations against.


Add this line to your application’s Gemfile:

gem 'data_structures_101'

And then execute:

$ bundle

Or install it yourself as:

$ gem install data_structures_101


require 'data_structures_101'

LinkedList example

To create a LinkedList

list =

HashTable example

To create a hash table using separate chaining strategy:

hash =

Heap example

To create a min heap Heap object

heap =,3,1, -10, min_heap: true)


The documentation lives at the github pages. For the nitty gritty details of the implementation go to

You can also go through several posts on where I have discussed the implementations.


In lieu of a formal styleguide, take care to maintain the existing coding style. Add specs for any new or changed functionality and tests it using RSpec.

Bug reports and pull requests are welcome on GitHub at


The gem is available as open source under the terms of the MIT License.