Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript JavaScript Array Iteration Methods Array Manipulation Practice filter()

Posted by Evgeniya Chernaya
Evgeniya Chernaya
11,895 Points

Can't find the problem, why my code doesn't work

Don't understand what is the problem

app.js 
const years = [1989, 2015, 2000, 1999, 2013, 1973, 2012];
let century20 = [];

// century20 should be: [1989, 2000, 1999, 1973]
// Write your code below
century20 = years.filter(year => year < 2001 && year > 1899);

2 Answers

KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,972 Points
KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,972 Points

The error you receive is "Bummer: It looks like you changed or removed the provided code. You can hit "Restart" if you want to start over."

The checker doesn't like that you changed this line

let century20;

Change it back and you'll pass

Ivo Culic
Ivo Culic
389 Points
Ivo Culic
Ivo Culic
389 Points

You have modified the "century20" variable to an empty array. Just declare the variable and afterward reassign the variable with the expression. Try this will work 100%:

const years = [1989, 2015, 2000, 1999, 2013, 1973, 2012];
let century20;

// century20 should be: [1989, 2000, 1999, 1973]
// Write your code below
century20 = years.filter(year => year >= 1900 && ( year <= 2000));