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