code: function() {
              	var mins = [];
  
              	for(var i = 1; i <= this.rows(); i++) {
              	    var min = null;
              	    var minIndex = -1;
  
              	    for(var j = 1; j <= this.cols(); j++) {
              		if(min === null || this.e(i, j) < min) {
              		    min = this.e(i, j);
              		    minIndex = j;
              		}
              	    }
  
              	    mins.push(minIndex);
              	}
  
              	return $V(mins);
                  }
docs: return the indexes of the columns with the smallest values for each row