simple-email/node_modules/to-object-path/index.js

/*!
 * to-object-path <https://github.com/jonschlinkert/to-object-path>
 *
 * Copyright (c) 2015, Jon Schlinkert.
 * Licensed under the MIT License.
 */

'use strict';

var typeOf = require('kind-of');

module.exports = function toPath(args) {
  if (typeOf(args) !== 'arguments') {
    args = arguments;
  }
  return filter(args).join('.');
};

function filter(arr) {
  var len = arr.length;
  var idx = -1;
  var res = [];

  while (++idx < len) {
    var ele = arr[idx];
    if (typeOf(ele) === 'arguments' || Array.isArray(ele)) {
      res.push.apply(res, filter(ele));
    } else if (typeof ele === 'string') {
      res.push(ele);
    }
  }
  return res;
}