26 lines
773 B
Ruby
26 lines
773 B
Ruby
# Given a single input string, write a function that produces all possible anagrams
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# of a string and outputs them as an array. At first, don't worry about
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# repeated strings. What time complexity is your solution?
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#
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# Extra credit: Deduplicate your return array without using uniq().
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#
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def anagrams(word)
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return false unless word.is_a?(String)
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return [word] if word.length == 1
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all_anagrams = Set.new
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(0...word.length).each do |i|
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current_letter = word[i]
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partial_anagram = anagrams(word[0...i] + word[i + 1..-1])
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(0...partial_anagram.length).each do |j|
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full_anagram = current_letter + partial_anagram[j]
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all_anagrams << full_anagram
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end
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end
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all_anagrams.to_a
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end
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# word.split("").combinations.map { |anagram| anagram.join }
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