Use reduce() to analyze data

JavaScript
1

Tell us what’s happening:
My code provides the correct answer to what the problem asks but it doesn’t pass the test.

The entire code wouldn’t fit below so I only added what I wrote and not the object.

Any help is appreciated. Thanks.

Your code so far


function getRating(watchList){
// Only change code below this line
let chris = watchList.filter(
  list => list["Director"] == "Christopher Nolan"
);
let ratings = chris.map(
  rating => rating["imdbRating"]
);
let conv = ratings.map(parseFloat);


let averageRating = conv.reduce((avg, rate) => avg + rate / 4,0);


// Only change code above this line
return averageRating;
}
console.log(getRating(watchList));

Your browser information:

User Agent is: Mozilla/5.0 (iPhone; CPU iPhone OS 13_5_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0 EdgiOS/45.9.18 Mobile/15E148 Safari/605.1.15.

Challenge: Use the reduce Method to Analyze Data

Link to the challenge:

2

which tests are you failing?

3 
Your code should return correct output after modifying the  `watchList` object.

It says I should be modifying ‘watchList’ but I thought the purpose of using map() filter() was to not modify the original array.

4

ah, no, that means that it should work with different watchList objects, not just the one in the editor - your function needs to be reusable

5

Ok I’ll take a look again tonight when I have time. Thank you.