wordle.rb

#!/usr/bin/env ruby

DICTIONARY = File.read('/Users/logaan/Desktop/scrabble2019.txt').split("\n").map{ |w| w.strip }
WORDLE_WORDS = DICTIONARY.filter{ |w| w.length == 5 }

LETTER_SCORES = WORDLE_WORDS.flat_map { |word| word.chars }.reduce({}) do |counts, character|
    if counts.include?(character)
      counts[character] = counts[character] + 1
    else
      counts[character] = 1
    end

    counts
  end

UNIQUE_WORDS = WORDLE_WORDS.filter{ |w| w.chars.uniq.length == 5 }

def best_guess(words)
  guess, score = words.reduce(["", 0]) do |best, challenger|
    _, best_score = best
    challenger_score = challenger.chars.map{ |c| LETTER_SCORES[c] }.sum

    if challenger_score > best_score
      [challenger, challenger_score]
    else
      best
    end
  end

  guess
end

first = UNIQUE_WORDS
puts "first: " + best_guess(first)
# Suggests: AROSE

# Contains an S.
# Does not contain A, R, O, or E
# The S is not in the 4th position
second = UNIQUE_WORDS.filter { |w| w =~ /S/ && w !~ /[AROE]/ && w =~ /^...[^S]./ }
puts "second: " + best_guess(second)
# Suggests: LINTS

# Contains an S and an L.
# Does not contain A, R, O, or E
# The L is not in the 1st position
# The S is not in the 4th for 5th position
third = WORDLE_WORDS.filter { |w| w =~ /S/ && w =~ /L/ && w !~ /[AROEINT]/ && w =~ /^[^L]..[^S][^S]/ }
puts "third: " + best_guess(third)
# Suggests: SULLY

fourth = WORDLE_WORDS.filter do |w|
  # Must contain a U
  w =~ /U/ &&
  # Must contain a L
    w =~ /L/ &&
  # Must not contain a any of: AROEINTY
    w !~ /[AROEINTY]/ &&
  # Must not contain a more than one L
    w !~ /L.*L/ &&
  # The 1st letter is S
  # The 2nd letter is not U
  # The 3rd letter is not L
  # The 4th letter is not S or L
  # The 5th letter is not S
    w =~ /^S[^U][^L][^SL][^S]/
end
puts "fourth: " + best_guess(fourth)
# Suggests: Slump
# SUCCESS!