another coding challenge that came up recently: given an odd number, return a centered pyramid with a base that width.

pyramid.js

var pyramid = function(width) {
  if (width % 2 == 0) {
    console.log("odd numbers only, please");
    return;
  }
  var gaps = '';
  for (var i = ((width-1)/2); i >= 0; i--) {
    gaps += ' ';
  }
  var hashes = '#';
  while(gaps.length > 0) {
    gaps = gaps.substring(0, gaps.length - 1);
    console.log(gaps + hashes);
    hashes += "##";
  }
}

pyramid(process.argv[2]);

I think I know where this one might come from.