tanvir002700/nth_permutation

# NthPermutation
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This gem is NthPermutation implemanted with c Extension. A super first permutation finding library in ruby.

## Installation

Add this line to your application's Gemfile:

```ruby
gem 'nth_permutation'
```

And then execute:

    $ bundle

Or install it yourself as:

    $ gem install nth_permutation

## Usage

``` ruby
require 'nth_permutation'
p = NthPermutation::String.new 'abc'
p.permutation 2 #=> 'acb'
p.possible_permutation #=> 6
```
## Limitation

Can't handle more than 20 character longer string.

## Development

After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).

## Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/tanvir002700/nth-permutation. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the [Contributor Covenant](http://contributor-covenant.org) code of conduct.

## License

The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).

## Code of Conduct

Everyone interacting in the Nth::Permutation project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the [code of conduct](https://github.com/tanvir002700/nth-permutation/blob/master/CODE_OF_CONDUCT.md).