34 lines
829 B
Standard ML
34 lines
829 B
Standard ML
structure BuildExistsStringSet =
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struct
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fun helpExists (pos, trie, acc) =
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if pos = Vector.length WordsList.words then
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acc
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else
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let
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val word = Vector.sub (WordsList.words, pos)
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val newAcc = StringSet.exists (word, trie)
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val acc = newAcc orelse acc
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in
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helpExists (pos + 1, trie, acc)
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end
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fun exists trie = helpExists (0, trie, true)
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fun main () =
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let
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val endTrie =
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Vector.foldl StringSet.insert StringSet.empty WordsList.words
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val startTime = Time.now ()
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val wordsExist = exists endTrie
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val finishTime = Time.now ()
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val searchDuration = Time.- (finishTime, startTime)
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val searchDuration = Time.toString searchDuration ^ "\n"
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in
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print searchDuration
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end
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end
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val _ = BuildExistsStringSet.main ()
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