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Feature/fast deep equal@2.0.1 #21

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merged 2 commits into from
Jun 4, 2018
Merged

Feature/fast deep equal@2.0.1 #21

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e624f67
Add updates from fast-deep-equal@2.0.1.
Jun 4, 2018
a523625
Add tests from fast-deep-equal@2.0.1
Jun 4, 2018
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15 changes: 10 additions & 5 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -5,8 +5,10 @@ var keyList = Object.keys;
var hasProp = Object.prototype.hasOwnProperty;

function equal(a, b) {
// fast-deep-equal index.js 2.0.1
if (a === b) return true;

if (a && b && typeof a == 'object' && typeof b == 'object') {
var arrA = isArray(a)
, arrB = isArray(b)
, i
Expand All @@ -16,7 +18,7 @@ function equal(a, b) {
if (arrA && arrB) {
length = a.length;
if (length != b.length) return false;
for (i = 0; i < length; i++)
for (i = length; i-- !== 0;)
if (!equal(a[i], b[i])) return false;
return true;
}
Expand All @@ -33,17 +35,18 @@ function equal(a, b) {
if (regexpA != regexpB) return false;
if (regexpA && regexpB) return a.toString() == b.toString();

if (a instanceof Object && b instanceof Object) {
var keys = keyList(a);
length = keys.length;

if (length !== keyList(b).length)
return false;

for (i = 0; i < length; i++)
for (i = length; i-- !== 0;)
if (!hasProp.call(b, keys[i])) return false;
// end fast-deep-equal

for (i = 0; i < length; i++) {
// Custom handling for React
for (i = length; i-- !== 0;) {
key = keys[i];
if (key === '_owner' && a.$$typeof && a._store) {
// React-specific: avoid traversing React elements' _owner.
Expand All @@ -57,11 +60,13 @@ function equal(a, b) {
}
}

// fast-deep-equal index.js 2.0.1
return true;
}

return false;
return a!==a && b!==b;
}
// end fast-deep-equal

module.exports = function exportedEqual(a, b) {
try {
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