For the training grade charts for ‘Average Score by Assessment Type’. How did you reduce the type and score array ?
Thanks for taking this course! To help you solve this problem, you may want to read about unwinding arrays: https://docs.mongodb.com/manual/reference/operator/aggregation/unwind/ Please let me know if you have any further questions.
I ran into an issue with my Firefox browser. Firefox displayed the “string accumulate” options, but didn’t always display the “Array Reduction” options. I used Microsoft Edge browser to do the Text Chart lab