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JavaScript JavaScript Array Iteration Methods Array Manipulation Practice map()

Posted by Hanwen Zhang
Hanwen Zhang
20,084 Points

Why My code is not working here :( Please help!!

Use the map method on the daysOfWeek array, creating a new array of abbreviated week days. Each abbreviated string should be the first three letters of the long version in daysOfWeek. Store the new array in the variable abbreviatedDays.

app.js 
const daysOfWeek = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];
let abbreviatedDays = daysOfWeek.map(strings => strings.slice(0, 3));

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

1 Answer

Peter Vann
Peter Vann
36,427 Points

Hi Hanwen!

I think your biggest issue is not assigning the value to dayAbbreviations on a separate line.

Your code, as written, would work in the real world, though.

This passes:

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
abbreviatedDays = daysOfWeek.map(dayName => dayName.slice(0, 3));

I hope that helps.

Stay safe and happy coding!

Hanwen Zhang
Hanwen Zhang
20,084 Points

Works now, thank you Peter