83 lines
2.9 KiB
JavaScript
83 lines
2.9 KiB
JavaScript
var Stack = require('./_Stack'),
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equalArrays = require('./_equalArrays'),
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equalByTag = require('./_equalByTag'),
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equalObjects = require('./_equalObjects'),
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getTag = require('./_getTag'),
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isArray = require('./isArray'),
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isHostObject = require('./_isHostObject'),
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isTypedArray = require('./isTypedArray');
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/** Used to compose bitmasks for comparison styles. */
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var PARTIAL_COMPARE_FLAG = 2;
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/** `Object#toString` result references. */
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var argsTag = '[object Arguments]',
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arrayTag = '[object Array]',
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objectTag = '[object Object]';
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/** Used for built-in method references. */
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var objectProto = Object.prototype;
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/** Used to check objects for own properties. */
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var hasOwnProperty = objectProto.hasOwnProperty;
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/**
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* A specialized version of `baseIsEqual` for arrays and objects which performs
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* deep comparisons and tracks traversed objects enabling objects with circular
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* references to be compared.
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*
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* @private
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* @param {Object} object The object to compare.
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* @param {Object} other The other object to compare.
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* @param {Function} equalFunc The function to determine equivalents of values.
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* @param {Function} [customizer] The function to customize comparisons.
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* @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
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* for more details.
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* @param {Object} [stack] Tracks traversed `object` and `other` objects.
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* @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
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*/
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function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
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var objIsArr = isArray(object),
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othIsArr = isArray(other),
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objTag = arrayTag,
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othTag = arrayTag;
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if (!objIsArr) {
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objTag = getTag(object);
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objTag = objTag == argsTag ? objectTag : objTag;
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}
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if (!othIsArr) {
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othTag = getTag(other);
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othTag = othTag == argsTag ? objectTag : othTag;
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}
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var objIsObj = objTag == objectTag && !isHostObject(object),
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othIsObj = othTag == objectTag && !isHostObject(other),
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isSameTag = objTag == othTag;
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if (isSameTag && !objIsObj) {
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stack || (stack = new Stack);
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return (objIsArr || isTypedArray(object))
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? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
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: equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
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}
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if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
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var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
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othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
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if (objIsWrapped || othIsWrapped) {
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var objUnwrapped = objIsWrapped ? object.value() : object,
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othUnwrapped = othIsWrapped ? other.value() : other;
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stack || (stack = new Stack);
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return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
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}
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}
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if (!isSameTag) {
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return false;
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}
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stack || (stack = new Stack);
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return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
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}
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module.exports = baseIsEqualDeep;
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