_baseIsEqual.js

define(['./_baseIsEqualDeep', './isObjectLike'], function(baseIsEqualDeep, isObjectLike) {

  /**
   * The base implementation of `_.isEqual` which supports partial comparisons
   * and tracks traversed objects.
   *
   * @private
   * @param {*} value The value to compare.
   * @param {*} other The other value to compare.
   * @param {boolean} bitmask The bitmask flags.
   *  1 - Unordered comparison
   *  2 - Partial comparison
   * @param {Function} [customizer] The function to customize comparisons.
   * @param {Object} [stack] Tracks traversed `value` and `other` objects.
   * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
   */
  function baseIsEqual(value, other, bitmask, customizer, stack) {
    if (value === other) {
      return true;
    }
    if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {
      return value !== value && other !== other;
    }
    return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);
  }

  return baseIsEqual;
});