Ruby equivalent of python -i

When you run python -i <filename>, the interpreter runs through the program and leaves you with a console for further exploration.

For a long time, I was strugging to find the same functionality in Ruby. Turns out that it is impossible with just irb, though pry does seem to offer it.

Install pry:

gem install pry

Structure your code like this:

require 'pry'

# do the things

binding.pry

This is still not as convenient as the Python equivalent….