code: function(template, args) {
        args = (args.constructor !== Array) ? Sysmo.makeArray(arguments).splice(1) : args;
        
        return template.replace(/\{(\d+)\}/g, function(match, capture) { 
          return args[capture];
        });
      }
docs: format a string using indexes, e.g. formatString("first name: {0}, last name: {1}", "Albert", "Einstein")