Bump to v4.1.0.

_baseIsEqualDeep.js

@@ -0,0 +1,83 @@
+var Stack = require('./_Stack'),
+    equalArrays = require('./_equalArrays'),
+    equalByTag = require('./_equalByTag'),
+    equalObjects = require('./_equalObjects'),
+    getTag = require('./_getTag'),
+    isArray = require('./isArray'),
+    isHostObject = require('./_isHostObject'),
+    isTypedArray = require('./isTypedArray');
+
+/** Used to compose bitmasks for comparison styles. */
+var PARTIAL_COMPARE_FLAG = 2;
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    objectTag = '[object Object]';
+
+/** Used for built-in method references. */
+var objectProto = global.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 {Function} equalFunc The function to determine equivalents of values.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual` for more details.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = getTag(object);
+    if (objTag == argsTag) {
+      objTag = objectTag;
+    } else if (objTag != objectTag) {
+      objIsArr = isTypedArray(object);
+    }
+  }
+  if (!othIsArr) {
+    othTag = getTag(other);
+    if (othTag == argsTag) {
+      othTag = objectTag;
+    } else if (othTag != objectTag) {
+      othIsArr = isTypedArray(other);
+    }
+  }
+  var objIsObj = objTag == objectTag && !isHostObject(object),
+      othIsObj = othTag == objectTag && !isHostObject(other),
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !(objIsArr || objIsObj)) {
+    return equalByTag(object, other, objTag, equalFunc, customizer, bitmask);
+  }
+  var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
+  if (!isPartial) {
+    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+    if (objIsWrapped || othIsWrapped) {
+      return equalFunc(objIsWrapped ? object.value() : object, othIsWrapped ? other.value() : other, customizer, bitmask, stack);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  stack || (stack = new Stack);
+  return (objIsArr ? equalArrays : equalObjects)(object, other, equalFunc, customizer, bitmask, stack);
+}
+
+module.exports = baseIsEqualDeep;