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 map()

Posted by Haardik Gupta
.a{fill-rule:evenodd;}techdegree
Haardik Gupta
Full Stack JavaScript Techdegree Student 5,459 Points

i'm confused

i cant understand what to do to complete the challenge

app.js 
const daysOfWeek = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];
let abbreviatedDays;

// abbreviatedDays should be: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"]
// Write your code below

1 Answer

Ignacio Rocha
Ignacio Rocha
7,462 Points
Ignacio Rocha
Ignacio Rocha
7,462 Points

You have to make a new array with the map function and then substring to take the first 3 letters of every word.

Try this:

abbreviatedDays = daysOfWeek.map(days => days.substr(0,3));

The .substr() method takes two values the first is where you want to start the extraction and the last one where to end it.