aaac7fed
 liuqimichale
add
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'use strict';
var isArray = Array.isArray;
var keyList = Object.keys;
var hasProp = Object.prototype.hasOwnProperty;
module.exports = function equal(a, b) {
if (a === b) return true;
if (a && b && typeof a == 'object' && typeof b == 'object') {
var arrA = isArray(a)
, arrB = isArray(b)
, i
, length
, key;
if (arrA && arrB) {
length = a.length;
if (length != b.length) return false;
for (i = length; i-- !== 0;)
if (!equal(a[i], b[i])) return false;
return true;
}
if (arrA != arrB) return false;
var dateA = a instanceof Date
, dateB = b instanceof Date;
if (dateA != dateB) return false;
if (dateA && dateB) return a.getTime() == b.getTime();
var regexpA = a instanceof RegExp
, regexpB = b instanceof RegExp;
if (regexpA != regexpB) return false;
if (regexpA && regexpB) return a.toString() == b.toString();
var keys = keyList(a);
length = keys.length;
if (length !== keyList(b).length)
return false;
for (i = length; i-- !== 0;)
if (!hasProp.call(b, keys[i])) return false;
for (i = length; i-- !== 0;) {
key = keys[i];
if (!equal(a[key], b[key])) return false;
}
return true;
}
return a!==a && b!==b;
};
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