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2 changes: 1 addition & 1 deletion google_search_features.js
Original file line number Diff line number Diff line change
Expand Up @@ -95,7 +95,7 @@ const BlinkFeatureNameToCaniuseName = {
* @param {string} propName Property name to filter on.
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@ebidel ebidel Mar 15, 2018

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first doc string needs to be {!Array=}, now

* @return {!Array} unique array of items
*/
function uniqueByProperty(items, propName) {
function uniqueByProperty(items = [], propName) {
const posts = Array.from(items.reduce((map, item) => {
return map.set(item[propName], item);
}, new Map()).values());
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