Codewars Solution to Character Counter in Ruby

character_counter.rb

CHARACTER COUNTER
You are going to be given a word. Your job will be to make sure that each character in that word has the exact same number of occurrences. You will return true if it is valid, or false if it is not.
For example:
"abcabc" is a valid word because 'a' appears twice, 'b' appears twice, and'c'appears twice.
"abcabcd" is NOT a valid word because 'a' appears twice, 'b' appears twice,'c' appears twice, but 'd' only appears once!
"123abc!" is a valid word because all of the characters only appear once in the word.

For this kata, capitals are considered the same as lowercase letters. Therefore: 'A' == 'a' .

INPUT
A string (no spaces) containing [a-z],[A-Z],[0-9] and common symbols. The length will be 0 < string < 100.

OUTPUT
true if the word is a valid word, or false if the word is not valid.

Test Cases
1.) Test.assert_equals(validate_word("abcabc"),True)
2.) Test.assert_equals(validate_word("Abcabc"),True)
3.) Test.assert_equals(validate_word("AbcabcC"),False)
4.) Test.assert_equals(validate_word("AbcCBa"),True)
5.) Test.assert_equals(validate_word("pippi"),False)
6.) Test.assert_equals(validate_word("?!?!?!"),True)
7.) Test.assert_equals(validate_word("abc123"),True)
8.) Test.assert_equals(validate_word("abcabcd"),False)
9.) Test.assert_equals(validate_word("abc!abc!"),True)
10.) Test.assert_equals(validate_word("abc:abc"),False)
////////CODE///////////
def validate_word(word)
 char_counter = {}
 word.split('').each do |char| #chained method to pull each element out of string
   char.downcase!
   if char_counter.keys.include? char
    char_counter[char] = char_counter[char] + 1 #assigning an existing key in hash
   else 
    char_counter[char] = 1   #create new key in hash
   end
 end
   puts char_counter.inspect
   vals = char_counter.values
   vals.each_with_index do |num, i|
     if i < vals.size-1 # can use .size or .count
      if num != vals[i + 1] #or use unelss 
         puts "FFFF#{num}"
         puts "SSSS#{vals.size}"
         return false
      end
     end       
   end
       return true
  end