Shard Detail

inflector v0.1.8

String inflectors for Crystal, ported from ActiveSupport (Rails) Inflector functionality.

Install & Use

Add the following code to your project's shard.yml under:

dependencies to use in production
- OR -
development_dependencies to use in development

  github: phoffer/


Inflector (port of ActiveSupport::Inflector) Build Status

This is an attempt to bring ActiveSupport's Inflector to Crystal. It started as a test idea for another project (Native Ruby extensions in Crystal), but then worked well enough that I decided to turn it into its own project.


Add this to your application's shard.yml:

    github: phoffer/
    version: "~> 0.1.8"

Somewhere in your app initialization, require "inflector". passes specs with Crystal versions 0.17.4, 0.18.7, 0.19.2, 0.20.0, and 0.21.0 (current).

Additionally, there are core extensions to String and Int. If you want these, then require "inflector/core_ext instead of the standard require.


Some examples are probably best. There is a full set of examples in spec/inflector/

Inflector.camelize("active_model")                    # => "ActiveModel"
Inflector.underscore("ActiveModel")                   # => "active_model"
Inflector.humanize("employee_salary")                 # => "Employee salary"
Inflector.humanize("author_id")                       # => "Author"
Inflector.upcase_first("what a Lovely Day")           # => "What a Lovely Day"
Inflector.titleize("x-men: the last stand")           # => "X Men: The Last Stand"
Inflector.classify("ham_and_eggs")                    # => "HamAndEgg"
Inflector.demodulize("CoreExt::String::Inflections")  # => "Inflections"
Inflector.deconstantize("Net::HTTP")                  # => "Net"
Inflector.foreign_key("Message")                      # => "message_id"
Inflector.ordinalize(1)                               # => "1st"
Inflector.ordinal(1)                                  # => "st"
Inflector.dasherize("puni_puni")                      # => "puni-puni"

Additionally, these are available if you required the core extensions. Additional examples are in spec/inflector/core_ext_spec

1.ordinalize                                          # => "1st"
1.ordinal                                             # => "st"
"post".pluralize                                      # => "posts"
"octopus".pluralize                                   # => "octopi"
"posts".singularize                                   # => "post"
"active_record".camelize                              # => "ActiveRecord"
"man from the boondocks".titleize                     # => "Man From The Boondocks"
"CoreExt::String::Inflections".demodulize             # => "Inflections"
"Net::HTTP".deconstantize                             # => "Net"
"fancyCategory".tableize                              # => "fancy_categories"
"ham_and_eggs".classify                               # => "HamAndEgg"
"employee_salary".humanize                            # => "Employee salary"
"what a Lovely Day".upcase_first                      # => "What a Lovely Day"
"Message".foreign_key                                 # => "message_id"


  • Enable additional tests (tests have been mostly ported from ActiveSupport::Inflector)
  • Hook up Travis CI


  1. Fork it ( )
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create a new Pull Request


  • rails Rails Core Team is greatly appreciated for what they have built and extensive documentation
  • phoffer Paul Hoffer - creator, maintainer