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Start your free trialRick S
11,273 Pointschallenge following this track
Not sure why this is setting each member of displayYears to null.
const years = [1989, 2015, 2000, 1999, 2013, 1973, 2012];
let displayYears;
// displayYears should be: ["2015 A.D.", "2013 A.D.", "2012 A.D."]
// Write your code below
displayYears = years
.filter(year => year > 2000)
.map (year => {
year = year.toString();
year += " A.D.";
}
);
I originally was trying year = year.toString() + " A.D.";
4 Answers
Peter Vann
36,427 PointsHi Rick!
Because your filter statement is one line, you don't need a return keyword in the arrow function, but because the map function is more than one line (in curly braces), you do.
This should work/pass:
const years = [1989, 2015, 2000, 1999, 2013, 1973, 2012];
let displayYears;
// displayYears should be: ["2015 A.D.", "2013 A.D.", "2012 A.D."]
// Write your code below
displayYears = years.filter(year => year > 2000)
.map(year => {
year = year.toString();
year += " A.D.";
return year; // This was missing, map wasn't returning anything (hence Nullness!?!)
});
I hope that helps.
Stay safe and happy coding!
Rick S
11,273 PointsI went back to my original attempt at using string interpolation that I failed at prior to trying concatenation.
I realized I left off the return statement, and this was my same problem with the code above.
They both work after this fix. But I also saw in the next video that I could dispense with the brackets and expression after the => and just provide the return value there.
Peter Vann
36,427 PointsSorry, just noticed your comment...
My bad... LOL
Rick S
11,273 PointsThanks for the response, though!