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+var Stack = require('./_Stack'),
+ equalArrays = require('./_equalArrays'),
+ equalByTag = require('./_equalByTag'),
+ equalObjects = require('./_equalObjects'),
+ getTag = require('./_getTag'),
+ isArray = require('./isArray'),
+ isBuffer = require('./isBuffer'),
+ isTypedArray = require('./isTypedArray');
+
+/** Used to compose bitmasks for value comparisons. */
+var COMPARE_PARTIAL_FLAG = 1;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+ arrayTag = '[object Array]',
+ objectTag = '[object Object]';
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {
+ var objIsArr = isArray(object),
+ othIsArr = isArray(other),
+ objTag = objIsArr ? arrayTag : getTag(object),
+ othTag = othIsArr ? arrayTag : getTag(other);
+
+ objTag = objTag == argsTag ? objectTag : objTag;
+ othTag = othTag == argsTag ? objectTag : othTag;
+
+ var objIsObj = objTag == objectTag,
+ othIsObj = othTag == objectTag,
+ isSameTag = objTag == othTag;
+
+ if (isSameTag && isBuffer(object)) {
+ if (!isBuffer(other)) {
+ return false;
+ }
+ objIsArr = true;
+ objIsObj = false;
+ }
+ if (isSameTag && !objIsObj) {
+ stack || (stack = new Stack);
+ return (objIsArr || isTypedArray(object))
+ ? equalArrays(object, other, bitmask, customizer, equalFunc, stack)
+ : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);
+ }
+ if (!(bitmask & COMPARE_PARTIAL_FLAG)) {
+ var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+ othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+ if (objIsWrapped || othIsWrapped) {
+ var objUnwrapped = objIsWrapped ? object.value() : object,
+ othUnwrapped = othIsWrapped ? other.value() : other;
+
+ stack || (stack = new Stack);
+ return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);
+ }
+ }
+ if (!isSameTag) {
+ return false;
+ }
+ stack || (stack = new Stack);
+ return equalObjects(object, other, bitmask, customizer, equalFunc, stack);
+}
+
+module.exports = baseIsEqualDeep;