Psuedo-glob text for set generation
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Expands glob-like strings into array sets.

If you've ever seen a string like this:

"hostname.{west, east, north}.{100..150}.com"

...and wished that there were a way to have that expand to all 153 urls without having to type out a bunch of arbitrarily deep map statements this gem is for you.

Why is this handy? If you have to type out a whole load of AWS names this can be a lot nicer to type and iterate over to perform actions.



A set is defined as a set of comma delimited items inside brackets:

"{1, 2, 3}"

In Globs, this would expand to the array [1, 2, 3]. The difference is if there happen to be multiple globs present it will expand those items:

Globs.expand("test.{a, b}.{1, 2}.com")
=> ["", "", "", ""]

These sets can be as long or as short as you would like.


Use inclusive (..) ranges to shorten consecutive elements in a Globs string:

=> ["", "", "", "", ""]


Add this line to your application's Gemfile:

gem 'globs'

And then execute:

$ bundle

Or install it yourself as:

$ gem install globs


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


Bug reports and pull requests are welcome on GitHub at This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.


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

Code of Conduct

Everyone interacting in the Globs project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.