Better max logging

logger.js

/**
 * Better max logging.
 * 
 * @see http://compusition.com/writings/js-live-api-basics
 * @see http://stackoverflow.com/a/4673436/2416000
 */
autowatch = 1;

Logger = new Global('Logger');
Logger.on = true;

function _formatHelper(m) {
  if (m && m.toString) {
    var s = m.toString();
    return (s.indexOf("[object ") >= 0) ? JSON.stringify(m) : s;
  } 
  return (m === null) ? '<null>' : m;
}

function _format(type, format, args) {
  if (!Logger.on) return;
  args = Array.prototype.slice.call(args, 1);
  var mess = format.replace(/{(\d+)}/g, function(match, number) {
    return (typeof args[number] != 'undefined') ? 
      _formatHelper(args[number]) : match
  }) + '\n';
  (type === 'log') ? post(mess) : error(mess);
}

Logger.log = function(format) { _format('log', format, arguments); }
Logger.err = function(format) { _format('err', format, arguments); }

Logger.log('\t\tHello from log.js | contact: [email protected]');