gistfile1.txt

require 'rubygems'
require 'differ'

# There could be only one match

original = "Epic lolcat fail bellmead drive!"
current  = "Epic wolfman fail bellmead dr!"

diff = Differ.diff_by_word(current, original).to_s
# => "Epic {"lolcat" >> "wolfman"} fail bellmead {"drive" >> "dr"}!

diff =~ /(\{"[a-zA-Z0-9]*" >> "[a-zA-Z0-9s]*"\})/  # => This will match the one instance 

# There could be two matches, or 2+ matches

original = "Same Same diff Same Same diff Same Same diff"
current  = "Same Same wooo Same Same wooo Same Same wooo"
# => "Same Same {"diff" >> "wooo"} Same Same {"diff" >> "wooo"} Same Same {"diff" >> "wooo"}"

#diff =~ /\{"(\w+)" >> "(\w+)"\}.+\{"(\w+)" >> "(\w+)"\}/  # => This will match two instances 

# How can I write a regexp that'll match one string for N instances of the pattern {"foo" >> "bar"}