SimplePattern

Very simple and plain pattern matching library using Object#===

require "simple_pattern"

All = SimplePattern::All
Any = SimplePattern::Any
Not = SimplePattern::Not

words = [
  ["payment",  59],  # :english
  ["the",      66],  # :article
  ["frühling", 37],  # :german
  ["cellar", 17.7],  # :float
]

words.map {|word|
  case word
  when SimplePattern[String, Float]
    :float
  when SimplePattern[Any["a", "an", "the"], Any]
    :article
  when SimplePattern[Not[/[äöüß]/], Any]
    :english
  else
    :german
  end
}
# => [:english, :article, :german, :float]

More examples are at spec/simple_pattern_spec.rb.

$ gem install simple_pattern

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.

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