old_snake_case_name = ARGV[0]
old_camel_case_name = "#{ARGV[0]}".split('_').collect(&:capitalize).join
new_snake_case_name = ARGV[1]
new_camel_case_name = "#{ARGV[1]}".split('_').collect(&:capitalize).join

`sed -i '' -e 's/#{old_snake_case_name}/#{new_snake_case_name}/g' $(find . -type f)`
`sed -i '' -e 's/#{old_camel_case_name}/#{new_camel_case_name}/g' $(find . -type f)`