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Avoid Array.from, Set, and spread elements when computing union.

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This commit is contained in:
Ben Newman
2017-09-12 12:56:49 -04:00
committed by Jesse Rosenberger
parent 8b8622960b
commit 174f3dc135
1 changed files with 5 additions and 3 deletions
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8
packages/allow-deny/allow-deny.js
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@@ -210,9 +210,11 @@ CollectionPrototype._updateFetch = function (fields) {
if (!self._validators.fetchAllFields) {
if (fields) {
self._validators.fetch =
// union
Array.from(new Set([...self._validators.fetch, ...fields]));
const union = Object.create(null);
const add = names => names && names.forEach(name => union[name] = 1);
add(self._validators.fetch);
add(fields);
self._validators.fetch = Object.keys(union);
} else {
self._validators.fetchAllFields = true;
// clear fetch just to make sure we don't accidentally read it