readmongo/node_modules/map-visit/index.js

'use strict';

var util = require('util');
var visit = require('object-visit');

/**
 * Map `visit` over an array of objects.
 *
 * @param  {Object} `collection` The context in which to invoke `method`
 * @param  {String} `method` Name of the method to call on `collection`
 * @param  {Object} `arr` Array of objects.
 */

module.exports = function mapVisit(collection, method, val) {
  if (isObject(val)) {
    return visit.apply(null, arguments);
  }

  if (!Array.isArray(val)) {
    throw new TypeError('expected an array: ' + util.inspect(val));
  }

  var args = [].slice.call(arguments, 3);

  for (var i = 0; i < val.length; i++) {
    var ele = val[i];
    if (isObject(ele)) {
      visit.apply(null, [collection, method, ele].concat(args));
    } else {
      collection[method].apply(collection, [ele].concat(args));
    }
  }
};

function isObject(val) {
  return val && (typeof val === 'function' || (!Array.isArray(val) && typeof val === 'object'));
}