I was watching Play by Play: Aaron Patterson today and saw him use a cool feature of IRB that I never knew existed, the underscore.
Open up an IRB console and paste in the following:
ruby {name: "tenderlove"}
Now type the following in your IRB console:
ruby puts _[:name]
You should see “tenderlove” printed out! The underscore stores the last value from your IRB session. In this case it’s a Hash that you created at the first step. Pretty awesome right?
