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var Stack = require('./_Stack'),    baseIsEqual = require('./_baseIsEqual');
/** Used to compose bitmasks for value comparisons. */var COMPARE_PARTIAL_FLAG = 1,    COMPARE_UNORDERED_FLAG = 2;
/** * The base implementation of `_.isMatch` without support for iteratee shorthands. * * @private * @param {Object} object The object to inspect. * @param {Object} source The object of property values to match. * @param {Array} matchData The property names, values, and compare flags to match. * @param {Function} [customizer] The function to customize comparisons. * @returns {boolean} Returns `true` if `object` is a match, else `false`. */function baseIsMatch(object, source, matchData, customizer) {  var index = matchData.length,      length = index,      noCustomizer = !customizer;
  if (object == null) {    return !length;  }  object = Object(object);  while (index--) {    var data = matchData[index];    if ((noCustomizer && data[2])          ? data[1] !== object[data[0]]          : !(data[0] in object)        ) {      return false;    }  }  while (++index < length) {    data = matchData[index];    var key = data[0],        objValue = object[key],        srcValue = data[1];
    if (noCustomizer && data[2]) {      if (objValue === undefined && !(key in object)) {        return false;      }    } else {      var stack = new Stack;      if (customizer) {        var result = customizer(objValue, srcValue, key, object, source, stack);      }      if (!(result === undefined            ? baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG, customizer, stack)            : result          )) {        return false;      }    }  }  return true;}
module.exports = baseIsMatch;