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    I understand your question. give me some time xD Commented Nov 19, 2017 at 23:08
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    Are you trying to determine the most left-side matches for every string in filteredNames? e.g. ["hat","hats","ham"] -> ha? Commented Nov 19, 2017 at 23:09
  • @Marty Yes, exactly. I had difficulties describing what I'm looking for but your question brings it to the point. Commented Nov 19, 2017 at 23:11