Welcome to your new gem! In this directory, you'll find the files you need to be able to package up your Ruby library into a gem. Put your Ruby code in the file lib/koala_2016_gem. To experiment with that code, run bin/console for an interactive prompt.

Add this line to your application's Gemfile:

gem 'koala_2016_gem'

And then execute:

$ bundle

Or install it yourself as:

$ gem install koala_2016_gem

引数が0以外ではじまる4桁の数字であり，なおかつ，値が偶数ならば 真を返す

Koala2016Gem::check_number　[int]　:　bool

文字列を受け取り，その長さが3文字以上，8文字以下であれば 真を返す

Koala2016Gem::enough_length　[str]　:　bool

After checking out the repo, run bin/setup to install dependencies. 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.

Bug reports and pull requests are welcome on GitHub at https://github.com/aiit2016/koala_2016_gem.

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