ryanthejuggler

    function minMaxMean(list) {
      return list.reduce(function(lastState, n) {
        var min = lastState.min,
            max = lastState.max,
            sum = lastState.sum,
            count = lastState.count;
        if(n < min) min = n;
        if(n > max) max = n;
        sum += n;
        count += 1;
        return {
          min: min,
          max: max,
          sum: sum,
          count: count
        }
      }, {min: Infinity, max: -Infinity, sum: 0, count: 0});
    }

    function minMaxMean(list) {
      return list.map(function(n){
        return {
          min: n,
          max: n,
          sum: n,
          count: 1
        }
      }).reduce(function(a, b) {
        return {
          min: (a.min < b.min ? a.min : b.min),
          max: (a.max > b.max ? a.max : b.max),
          sum: a.sum + b.sum,
          count: a.count + b.count
        }
      });
    }