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# did_you_mean [](https://rubygems.org/gems/did_you_mean) [](https://travis-ci.org/yuki24/did_you_mean) ## Installation Ruby 2.3 and later ships with this gem and it will automatically be `require`d when a Ruby process starts up. No special setup is required. ## Examples ### NameError #### Correcting a Misspelled Method Name ```ruby methosd # => NameError: undefined local variable or method `methosd' for main:Object # Did you mean? methods # method ``` #### Correcting a Misspelled Class Name ```ruby OBject # => NameError: uninitialized constant OBject # Did you mean? Object ``` #### Suggesting an Instance Variable Name ```ruby @full_name = "Yuki Nishijima" first_name, last_name = full_name.split(" ") # => NameError: undefined local variable or method `full_name' for main:Object # Did you mean? @full_name ``` #### Correcting a Class Variable Name ```ruby @@full_name = "Yuki Nishijima" @@full_anme # => NameError: uninitialized class variable @@full_anme in Object # Did you mean? @@full_name ``` ### NoMethodError ```ruby full_name = "Yuki Nishijima" full_name.starts_with?("Y") # => NoMethodError: undefined method `starts_with?' for "Yuki Nishijima":String # Did you mean? start_with? ``` ## Experimental Features Aside from the basic features above, the `did_you_mean` gem comes with experimental features. They can be enabled by calling `require 'did_you_mean/experimental'`. **Keep in mind that these experimental features should never be enabled in production as they would impact Ruby's performance and use some unstable Ruby APIs.** ### Correcting an Instance Variable When It's Incorrectly Typed ```ruby require 'did_you_mean/experimental' @full_name = "Yuki Nishijima" @full_anme.split(" ") # => NoMethodError: undefined method `split' for nil:NilClass # Did you mean? @full_name ``` ### Correcting a Hash Key Name ```ruby hash = {foo: 1, bar: 2, baz: 3} hash.fetch(:fooo) # KeyError: key not found: :fooo # Did you mean? :foo ``` ### Displaying a Warning When `initialize` is Incorrectly Typed ```ruby require 'did_you_mean/experimental' class Person def intialize ... end end # => warning: intialize might be misspelled, perhaps you meant initialize? ``` ## Verbose Formatter This verbose formatter changes the error message format to take more lines/spaces so it'll be slightly easier to read the suggestions. This formatter can totally be used in any environment including production. ```ruby OBject # => NameError: uninitialized constant OBject # Did you mean? Object require 'did_you_mean/verbose_formatter' OBject # => NameError: uninitialized constant OBject # # Did you mean? Object # ``` ## Contributing 1. Fork it (http://github.com/yuki24/did_you_mean/fork) 2. Create your feature branch (`git checkout -b my-new-feature`) 3. Commit your changes (`git commit -am 'Add some feature'`) 4. Make sure all tests pass (`bundle exec rake`) 5. Push to the branch (`git push origin my-new-feature`) 6. Create new Pull Request ## License Copyright (c) 2014-16 Yuki Nishijima. See MIT-LICENSE for further details.
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