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Start your free trialJonathan Grieve
Treehouse Moderator 91,253 PointsStruggling with method chaining
I'm really stuck with this one.
I think I've got filter right but even after looking at the documentation I'm still at a loss for how to use the correct map method.
Help! :)
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( century => century < 2001)
.map((years){return years;});
console.log(displayYears + " A.D.");
2 Answers
Thomas Nilsen
14,957 PointsYou are very close:
const years = [1989, 2015, 2000, 1999, 2013, 1973, 2012];
// displayYears should be: ["2015 A.D.", "2013 A.D.", "2012 A.D."]
// Write your code below
let displayYears = years
.filter(x => x >= 2001)
.map(x => x + " A.D.");
console.log(displayYears);
Ari Misha
19,323 Pointshiya Chris! Well its pretty straightforward imo. We need to use map and filter in order to display the array in this format: displayYears = ["2001 A.D.", "2013 A.D.", "2012 A.D."]
. Here is how your code should look like ( i dunno how to explain it):
...
displayYears = years.filter ( (year) => year >= "2001").map ((year) => `${year} A.D.`)
Jonathan Grieve
Treehouse Moderator 91,253 PointsJonathan Grieve
Treehouse Moderator 91,253 PointsThanks... this worked.
So what's happening I think is I got the wrong condition but I think it sank in with the map method yet :)
So with map is it...
Parameter.... callback.... string. But the last part goes in the method rather than the final console.log? Although I've tested it and that seems to work too.