react app

react-app/node_modules/lodash/internal/baseIsEqualDeep.js

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+var equalArrays = require('./equalArrays'),
+    equalByTag = require('./equalByTag'),
+    equalObjects = require('./equalObjects'),
+    isArray = require('../lang/isArray'),
+    isTypedArray = require('../lang/isTypedArray');
+
+/** `Object#toString` result references. */
+var argsTag = '[object Arguments]',
+    arrayTag = '[object Array]',
+    objectTag = '[object Object]';
+
+/** Used for native method references. */
+var objectProto = Object.prototype;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objToString = objectProto.toString;
+
+/**
+ * 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 comparing objects.
+ * @param {boolean} [isLoose] Specify performing partial comparisons.
+ * @param {Array} [stackA=[]] Tracks traversed `value` objects.
+ * @param {Array} [stackB=[]] Tracks traversed `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+function baseIsEqualDeep(object, other, equalFunc, customizer, isLoose, stackA, stackB) {
+  var objIsArr = isArray(object),
+      othIsArr = isArray(other),
+      objTag = arrayTag,
+      othTag = arrayTag;
+
+  if (!objIsArr) {
+    objTag = objToString.call(object);
+    if (objTag == argsTag) {
+      objTag = objectTag;
+    } else if (objTag != objectTag) {
+      objIsArr = isTypedArray(object);
+    }
+  }
+  if (!othIsArr) {
+    othTag = objToString.call(other);
+    if (othTag == argsTag) {
+      othTag = objectTag;
+    } else if (othTag != objectTag) {
+      othIsArr = isTypedArray(other);
+    }
+  }
+  var objIsObj = objTag == objectTag,
+      othIsObj = othTag == objectTag,
+      isSameTag = objTag == othTag;
+
+  if (isSameTag && !(objIsArr || objIsObj)) {
+    return equalByTag(object, other, objTag);
+  }
+  if (!isLoose) {
+    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, isLoose, stackA, stackB);
+    }
+  }
+  if (!isSameTag) {
+    return false;
+  }
+  // Assume cyclic values are equal.
+  // For more information on detecting circular references see https://es5.github.io/#JO.
+  stackA || (stackA = []);
+  stackB || (stackB = []);
+
+  var length = stackA.length;
+  while (length--) {
+    if (stackA[length] == object) {
+      return stackB[length] == other;
+    }
+  }
+  // Add `object` and `other` to the stack of traversed objects.
+  stackA.push(object);
+  stackB.push(other);
+
+  var result = (objIsArr ? equalArrays : equalObjects)(object, other, equalFunc, customizer, isLoose, stackA, stackB);
+
+  stackA.pop();
+  stackB.pop();
+
+  return result;
+}
+
+module.exports = baseIsEqualDeep;