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I am using Ruby on Rails 3.2.2 and I am looking for a method which is the opposite of except for hashes (except documentation), probably an only method. Is there some method or an easy way so that I can return a hash that includes only the given keys?
# Example, 'only' method as opposite to the 'except'
@person.update_attributes(params[:person].only(:name, :surname))
I think what you are looking for is
slice, which will return a hash with only the given keys.