| 1 | 'use strict';
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| 2 |
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| 3 | // do not edit .js files directly - edit src/index.jst
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| 4 |
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| 5 |
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| 6 | var envHasBigInt64Array = typeof BigInt64Array !== 'undefined';
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| 7 |
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| 8 |
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| 9 | module.exports = function equal(a, b) {
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| 10 | if (a === b) return true;
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| 11 |
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| 12 | if (a && b && typeof a == 'object' && typeof b == 'object') {
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| 13 | if (a.constructor !== b.constructor) return false;
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| 14 |
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| 15 | var length, i, keys;
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| 16 | if (Array.isArray(a)) {
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| 17 | length = a.length;
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| 18 | if (length != b.length) return false;
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| 19 | for (i = length; i-- !== 0;)
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| 20 | if (!equal(a[i], b[i])) return false;
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| 21 | return true;
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| 22 | }
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| 23 |
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| 24 |
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| 25 | if ((a instanceof Map) && (b instanceof Map)) {
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| 26 | if (a.size !== b.size) return false;
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| 27 | for (i of a.entries())
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| 28 | if (!b.has(i[0])) return false;
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| 29 | for (i of a.entries())
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| 30 | if (!equal(i[1], b.get(i[0]))) return false;
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| 31 | return true;
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| 32 | }
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| 33 |
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| 34 | if ((a instanceof Set) && (b instanceof Set)) {
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| 35 | if (a.size !== b.size) return false;
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| 36 | for (i of a.entries())
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| 37 | if (!b.has(i[0])) return false;
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| 38 | return true;
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| 39 | }
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| 40 |
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| 41 | if (ArrayBuffer.isView(a) && ArrayBuffer.isView(b)) {
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| 42 | length = a.length;
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| 43 | if (length != b.length) return false;
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| 44 | for (i = length; i-- !== 0;)
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| 45 | if (a[i] !== b[i]) return false;
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| 46 | return true;
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| 47 | }
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| 48 |
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| 49 |
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| 50 | if (a.constructor === RegExp) return a.source === b.source && a.flags === b.flags;
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| 51 | if (a.valueOf !== Object.prototype.valueOf) return a.valueOf() === b.valueOf();
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| 52 | if (a.toString !== Object.prototype.toString) return a.toString() === b.toString();
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| 53 |
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| 54 | keys = Object.keys(a);
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| 55 | length = keys.length;
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| 56 | if (length !== Object.keys(b).length) return false;
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| 57 |
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| 58 | for (i = length; i-- !== 0;)
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| 59 | if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;
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| 60 |
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| 61 | for (i = length; i-- !== 0;) {
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| 62 | var key = keys[i];
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| 63 |
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| 64 | if (key === '_owner' && a.$$typeof) {
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| 65 | // React-specific: avoid traversing React elements' _owner.
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| 66 | // _owner contains circular references
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| 67 | // and is not needed when comparing the actual elements (and not their owners)
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| 68 | continue;
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| 69 | }
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| 70 |
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| 71 | if (!equal(a[key], b[key])) return false;
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| 72 | }
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| 73 |
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| 74 | return true;
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| 75 | }
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| 76 |
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| 77 | // true if both NaN, false otherwise
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| 78 | return a!==a && b!==b;
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| 79 | };
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