conveyal/modeify

/**
 * toString.
 */

var toString = window.JSON
  ? JSON.stringify
  : function(_){ return String(_); };

/**
 * Export `fmt`
 */

module.exports = fmt;

/**
 * Formatters
 */

fmt.o = toString;
fmt.s = String;
fmt.d = parseInt;

/**
 * Format the given `str`.
 *
 * @param {String} str
 * @param {...} args
 * @return {String}
 * @api public
 */

function fmt(str){
  var args = [].slice.call(arguments, 1);
  var j = 0;

  return str.replace(/%([a-z])/gi, function(_, f){
    return fmt[f]
      ? fmt[f](args[j++])
      : _ + f;
  });
}