How do I count the frequencies of the letters in user input?

Question

How do I count the frequency of letters that appear in the word \"supercaliforniamightly\" when the user enters a word like that in Ruby, and print out stars or asterisks to cou

Answer 1

I changed the output a little bit (removed the space before the comma) so that I don't look like uneducated.

puts "Enter string: "
gets.chomp.downcase
.each_char.with_object(Hash.new(0)){|c, h| h[c] += 1}
.sort_by{|_, v| v}
.reverse
.each{|k, v| puts k + ", " + v.to_s + " " + "*" * v}

Output:

Enter string: 
uuuuiiii
i, 4 ****
u, 4 ****