Enumerable::FindOnly

Adds the #find_only method to all Enumerable objects.

#find_only behaves like first, except that it raises if more than one item is in the collection.

# no items in the collection:

[].find_only => nil


# exactly one item in the collection:

[:item].find_only => :item

# more than one items in the collection:

[:first, :second].find_only => raises TooManyItems

Add this line to your application's Gemfile:

gem 'enumerable-find_only'

And then execute:

$ bundle

Or install it yourself as:

$ gem install enumerable-find_only

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