CHALLENGE DESCRIPTION:
Write a program which swaps letters' case in a sentence. All non-letter characters should remain the same.
INPUT SAMPLE:
Your program should accept as its first argument a path to a filename. Input example is the following
Hello world! JavaScript language 1.8 A letter
OUTPUT SAMPLE:
Print results in the following way.
hELLO WORLD! jAVAsCRIPT LANGUAGE 1.8 a LETTER
My Code
#!/usr/bin/env ruby -w ARGF.each_line do |line| puts line.chomp.swapcase end
