72 lines
1.9 KiB
JavaScript
72 lines
1.9 KiB
JavaScript
// https://www.npmjs.com/package/fast-deep-equal - 3/3/2021
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const envHasBigInt64Array = typeof BigInt64Array !== 'undefined';
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function vEq(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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if (a.constructor !== b.constructor) return false;
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// we want to convert all V types to JS for comparison.
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if ('$toJS' in a)
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a = a.$toJS();
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if ('$toJS' in b)
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b = b.$toJS();
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var length, i, keys;
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if (Array.isArray(a)) {
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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 (!vEq(a[i], b[i])) return false;
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return true;
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}
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if ((a instanceof Map) && (b instanceof Map)) {
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if (a.size !== b.size) return false;
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for (i of a.entries())
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if (!b.has(i[0])) return false;
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for (i of a.entries())
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if (!vEq(i[1], b.get(i[0]))) return false;
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return true;
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}
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if ((a instanceof Set) && (b instanceof Set)) {
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if (a.size !== b.size) return false;
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for (i of a.entries())
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if (!b.has(i[0])) return false;
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return true;
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}
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if (ArrayBuffer.isView(a) && ArrayBuffer.isView(b)) {
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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 (a[i] !== b[i]) return false;
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return true;
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}
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if (a.constructor === RegExp) return a.source === b.source && a.flags === b.flags;
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if (a.valueOf !== Object.prototype.valueOf) return a.valueOf() === b.valueOf();
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if (a.toString !== Object.prototype.toString) return a.toString() === b.toString();
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keys = Object.keys(a);
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length = keys.length;
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if (length !== Object.keys(b).length) return false;
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for (i = length; i-- !== 0;)
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if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;
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for (i = length; i-- !== 0;) {
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var key = keys[i];
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if (!vEq(a[key], b[key])) return false;
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}
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return true;
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}
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// true if both NaN, false otherwise
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return a !== a && b !== b;
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}; |