Jordon Bedwell

Challenge #12

This week’s challenge was reported to have been asked in interviews at Amazon

I’ve never been asked this kind of question. I’ve never interviewed at Amazon though. If that’s the kind of question you are going to ask, let me go ahead and give you an answer ahead of time. Discussion, Repl.it (Javascript), Repl.it (Ruby)Yes even as an experienced programmer I still use CodeAcadamy for fun and practice. You should too, just not the paid version.

Ruby

max = 10000000; scores = [874300, 879200, 1172100, 1141800, 933900,
1170500, 1064500, 1190000, 1050200, 1090400, 1062800, 1061700, 1218000,
1177200, 1190200, 1110100, 1158400, 985600, 1047200, 1049100, 1138600,
1068000, 1127700, 1144800, 1195100]

def score_settler(array, max)
  return [] if array.size == 0

  gt = []
  pivot = array[0]
  lt = []

  # for i in 1..(array.size - 1)
  1.upto(array.size - 1).each do |i|
    next if array[i] > max
    gt.unshift(array[i]) and next if array[i] > pivot
    lt.unshift(array[i])
  end

  lt = score_settler(lt, max)
  gt = score_settler(gt, max)
  gt | lt.unshift(
    pivot
  )
end

score_settler(scores, max)
# => [1218000, 1195100, 1190200, 1190000, 1177200, 1172100, 1170500,
# 1158400, 1144800, 1141800, 1138600, 1127700, 1110100, 1090400, 1068000,
# 1064500, 1062800, 1061700, 1050200, 1049100, 1047200, 985600, 933900,
# 879200, 874300]

JavaScript

let max = 10000000, scores = [874300, 879200, 1172100, 1141800, 933900,
1177200, 1190200, 1110100, 1158400, 985600, 1047200, 1049100, 1138600,
1170500, 1064500, 1190000, 1050200, 1090400, 1062800, 1061700, 1218000,
1068000, 1127700, 1144800, 1195100]

function scoreSettler(array, max) {
  if (array.length === 0) return [];

  let gt = [];
  let pivot = array[0];
  let lt = [];
  let i;

  for (i = 1; i < array.length; i++) {
    if (array[i] < max) {
      if (array[i] > pivot) {
        gt.unshift(array[i]); continue;
      }

      lt.unshift(array[i]);
    }
  }

  lt = scoreSettler(lt, max);
  gt = scoreSettler(gt, max);
  return gt.concat(pivot,
    lt
  );
}

console.log(scoreSettler(scores, max))