8 lines
239 B
Crystal
8 lines
239 B
Crystal
words = File.read("unixdict.txt").each_line.to_set
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semordnilap = words.compact_map {|word|
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reversed = word.reverse
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if word < reversed && words.includes? reversed
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{ word, reversed }
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end
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}
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p semordnilap.size, semordnilap.sample(5)
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