def arr_from_words_at_loc word_loc
  words_file = File.new(word_loc, "r")
  words_string  = words_file.gets
  words_file.close
  words_arr = words_string.split ","
  formatted_words_arr = words_arr.collect{ |word| word[1...-1] }
  words_arr = nil
  formatted_words_arr
end
 
def is_triangle_num n
  return true if ((8*n+1)**0.5)%1 == 0
  return false
end
 
def value_of_char char
  char-64
end
 
def convert_word_to_num word
  word.each_char.inject(0) { |wordnum, char| wordnum + value_of_char(char[0])}
end
 
def num_of_tri_words_in_arr arr
  arr.inject(0) { |num, currword| 
    if is_triangle_num(convert_word_to_num(currword))
      num += 1
    else
      num
    end
    } 
end
 
words = arr_from_words_at_loc "words.txt"
num_of_tri_words = num_of_tri_words_in_arr words
p num_of_tri_words