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var keys = require('../object/keys');
/** Used for native method references. */
var objectProto = Object.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty = objectProto.hasOwnProperty;
/**
* A specialized version of `baseIsEqualDeep` for objects with support for
* partial deep comparisons.
*
* @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 values.
* @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 equalObjects(object, other, equalFunc, customizer, isLoose, stackA, stackB) {
var objProps = keys(object),
objLength = objProps.length,
othProps = keys(other),
othLength = othProps.length;
if (objLength != othLength && !isLoose) {
return false;
}
var index = objLength;
while (index--) {
var key = objProps[index];
if (!(isLoose ? key in other : hasOwnProperty.call(other, key))) {
return false;
}
}
var skipCtor = isLoose;
while (++index < objLength) {
key = objProps[index];
var objValue = object[key],
othValue = other[key],
result = customizer ? customizer(isLoose ? othValue : objValue, isLoose? objValue : othValue, key) : undefined;
// Recursively compare objects (susceptible to call stack limits).
if (!(result === undefined ? equalFunc(objValue, othValue, customizer, isLoose, stackA, stackB) : result)) {
return false;
}
skipCtor || (skipCtor = key == 'constructor');
}
if (!skipCtor) {
var objCtor = object.constructor,
othCtor = other.constructor;
// Non `Object` object instances with different constructors are not equal.
if (objCtor != othCtor &&
('constructor' in object && 'constructor' in other) &&
!(typeof objCtor == 'function' && objCtor instanceof objCtor &&
typeof othCtor == 'function' && othCtor instanceof othCtor)) {
return false;
}
}
return true;
}
module.exports = equalObjects;
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