lodash/internal/baseMatches.js

define(['./baseIsMatch', './getMatchData', './toObject'], function(baseIsMatch, getMatchData, toObject) {

  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
  var undefined;

  /**
   * The base implementation of `_.matches` which does not clone `source`.
   *
   * @private
   * @param {Object} source The object of property values to match.
   * @returns {Function} Returns the new function.
   */
  function baseMatches(source) {
    var matchData = getMatchData(source);
    if (matchData.length == 1 && matchData[0][2]) {
      var key = matchData[0][0],
          value = matchData[0][1];

      return function(object) {
        if (object == null) {
          return false;
        }
        return object[key] === value && (value !== undefined || (key in toObject(object)));
      };
    }
    return function(object) {
      return baseIsMatch(object, matchData);
    };
  }

  return baseMatches;
});