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message_list_data: Convert id_set from object to Set. 

Signed-off-by: Anders Kaseorg <anders@zulipchat.com>
This commit is contained in:
Anders Kaseorg 2020-02-11 21:36:52 -08:00 committed by Tim Abbott
parent 9fa9f37521
commit a6a19c6ace
1 changed files with 2 additions and 6 deletions
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8
static/js/message_list_data.js
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@ -451,16 +451,12 @@ MessageListData.prototype = {
// messages that we have recently visited.
let next_msg_id = 0;
const id_set = {};
for (const msg_id of msg_ids) {
id_set[msg_id] = true;
}
const id_set = new Set(msg_ids);
let idx = this.selected_idx() + 1;
while (idx < this._items.length) {
const msg_id = this._items[idx].id;
if (!id_set[msg_id]) {
if (!id_set.has(msg_id)) {
break;
}
next_msg_id = msg_id;