33 lines
580 B
Ruby
33 lines
580 B
Ruby
#!/usr/bin/env ruby
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WORDS = File.open("/usr/share/dict/words", &:read).lines.map do |word|
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word.strip.downcase
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end.freeze
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def word?(word)
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WORDS.include? word.downcase
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end
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def permute(letters, prefix: "", &cb)
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1.upto letters.size do
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cur_prefix = prefix + letters.first
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test_set = letters[1..]
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if letters.size > 2
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permute test_set, prefix: cur_prefix, &cb
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else
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word = cur_prefix + test_set.join
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if word? word
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yield word
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end
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end
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letters = letters.rotate
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end
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end
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permute %w[u h s e t l] do |word|
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puts word
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end
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