ruby "require a local file or gem in irb" via https://stackoverflow.com/questions/43519292/load-file-from-local-gem-in-irb#46941281

ruby-require-a-local-file-or-gem-in-irb.rb

# via https://stackoverflow.com/questions/43519292/load-file-from-local-gem-in-irb#46941281
#
# If you want to require a local file or gem in irb, I like this method:
#
# irb -I lib -r usps_countries
# This allows you to then require the module in your new irb instance:
#
# require 'usps_countries'
# Options used:
#
# -I path           Specify $LOAD_PATH directory
# -r load-module    Same as `ruby -r'
#