fetch.rb

def count_letters(given_string)
  given_arr = given_string.split('')
  puts "String length: #{given_arr.length}"
  hsh = {}

  given_arr.each do |character|
    hsh[character] = hsh.fetch(character,0) + 1
  end

  hsh.each_pair do |key, val|
    puts "The character #{key} appears #{val} times."
  end

end

count_letters("This is my string, yo. How do you like it?")