Javascript Array matrixLength()

Array.prototype.matrixLength = function() {
  var elements = this.map(function(vector) {
    return vector.length;
  });/*w  w w . ja  v  a  2  s  . co m*/

  return elements.sum();
};

function randomInt(min, max) {
  return Math.floor(Math.random() * (max - min)) + min;
}