BBEdit: Toggle CamelCase _

Toggle CamelCase _.rb

#!/usr/bin/env ruby

#-------------------------------------------------------------------------------
# Toggle Camelcase _
#-------------------------------------------------------------------------------
# Jason Sims <jason@symmetriq.com>
#-------------------------------------------------------------------------------
#
# Toggles between camelcase and underscores
# e.g. doTheThing <-> do_the_thing
#
#-------------------------------------------------------------------------------
#
# Installation in BBEdit:
#
# 1. Place this file in your "Text Filters" directory:
#    ~/Library/Application Support/BBEdit/Text Filters/
#        or
#    ~/Dropbox/Application Support/BBEdit/Text Filters/
#
# 2. Assign a keyboard shortcut to "Toggle CamelCase _" in:
#    BBEdit → Preferences → Menus & Shortcuts → Text → Apply Text Filter
#
#-------------------------------------------------------------------------------
# More scripts & snippets here:
# https://gist.github.com/symmetriq
#-------------------------------------------------------------------------------

input = ARGF.set_encoding('UTF-8').read
if input.include? '_'
  # has underscores; convert to camelCase
  print input.gsub(/_[A-Za-z]/) {|char| char[1].upcase }
else
  # treat as camelCase (nothing will happen if the string contains no capital letters)
  print input.gsub(/([A-Z])/, '_\1').downcase
end