Errors in Mongodb cheat sheet which needs correction

MongoDB University
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1

There are few typos in commands listed in Mongodb cheat sheet available at MongoDB Courses and Trainings | MongoDB University which results in errors and needs correction, I tried to find a way to report the issues directly to support from chat and contact page but that didn’t work.

Particularly in page 8 and 9 near $group open bracket is used which should be open curly braces instead, this typo repeats multiple time in commands on same pages:

Here is an Example:

Problem:

db.orders.aggregate([{$group:(_id:null,count:{$sum:1}}}])
Uncaught:
SyntaxError: Unexpected token, expected "," (1:33)

> 1 | db.orders.aggregate([{$group:(_id:null,count:{$sum:1}}}])
    |                                  ^
  2 |

Correction:

 db.orders.aggregate([{$group:{_id:null,count:{$sum:1}}}])
[ { _id: null, count: 1 } ]