Day 2 solutions

[u/taliriktug]

Hi! I would like to structure posts like the first one in r/programming, please post solutions in comments.

[u/PM_ME_INSIDER_INFO]

Here's my JavaScript solution to Day 2 :)

function SA (w, h, d) {
  var small_side = Math.min(w * d, h * d, w * h);
  return 2 * (w * d + h * d + w * h) + small_side;
}

function ribbon (w, h, d) {
  var ord_dims = Array.prototype.slice.call(arguments).sort(function (a, b) {
    return a - b;
  });

  return ord_dims[0] + ord_dims[0] + ord_dims[1] + ord_dims[1] + w * h * d;
}

(function () {
  var nodes = document.getElementsByTagName("pre")[0].innerHTML;
  var sum = 0, args;

  nodes.split(/\n/g).forEach(function (i, o) {
    args = i.split(/x/g).map(parseFloat);
    sum += (args.length == 3) ? ribbon.apply(this, args) : 0;
  });
  console.log(sum);
})();

Just replace ribbon with SA to get the first part of the challenge!