internal/baseMatches.js

define(['./baseClone', './baseIsMatch', './isStrictComparable', '../object/keys'], function(baseClone, baseIsMatch, isStrictComparable, keys) {

  /** Used for native method references. */
  var objectProto = Object.prototype;

  /** Used to check objects for own properties. */
  var hasOwnProperty = objectProto.hasOwnProperty;

  /**
   * The base implementation of `_.matches` which supports specifying whether
   * `source` should be cloned.
   *
   * @private
   * @param {Object} source The object of property values to match.
   * @param {boolean} [isCloned] Specify cloning the source object.
   * @returns {Function} Returns the new function.
   */
  function baseMatches(source, isCloned) {
    var props = keys(source),
        length = props.length;

    if (length == 1) {
      var key = props[0],
          value = source[key];

      if (isStrictComparable(value)) {
        return function(object) {
          return object != null && value === object[key] && hasOwnProperty.call(object, key);
        };
      }
    }
    if (isCloned) {
      source = baseClone(source, true);
    }
    var values = Array(length),
        strictCompareFlags = Array(length);

    while (length--) {
      value = source[props[length]];
      values[length] = value;
      strictCompareFlags[length] = isStrictComparable(value);
    }
    return function(object) {
      return baseIsMatch(object, props, values, strictCompareFlags);
    };
  }

  return baseMatches;
});