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Hey Ruby‽

NOTE: Heyruby is still in extreme infancy, so please refrain from Tweeting or submitting anything anywhere until I can settle a few more things. Direct feedback to is, of course, welcome!

Good programmers are like scientists. When they want to answer a question They form a hypothesis, then verify it with an experiment. Rubyists have the experimentation phase down, but we tend not to hypothesize fully. This gem helps people new to Ruby by prompting them for a hypothesis before returning the result of their experiment.


This gem isn't really meant to go in your Gemfile, it's only utility is in nagging you to think a bit harder.

Install it yourself as:

$ gem install heyruby


Got a question? Ask Ruby! I wonder what the line %w[foo bar baz].map{ |s| s.split /[aeiou]/ }.flatten does.

$ heyruby
Hey Ruby‽> %w[foo bar baz].map{ |s| s.split /[aeiou]/ }.flatten
What do you think the result of
%w[foo bar baz].map{ |s| s.split /[aeiou]/ }.flatten

will be? (Type . on a line by itself when done)
| I should get a single array containing the strings ["f", "b", "r", "b",
| "z"].
| .
Were you right?
Try somthing else>

Origin of the Name

When I was first learning Ruby in 2009 and 2010, my mental process for doing so went along the lines of "Hey Ruby, what's 2 + 2?". This was so pervasive that for some time I had alias heyruby='irb' in my bashrc. I hope that heyruby will help people new to Ruby to gain the same comfort and casual familiarity with the Ruby language that I have been developing since those early days.


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