Treehouse | Community | Practice reduce()

⚡ CYBER NOVEMBER SALE ⚡ 50% off any plan for 6 months, exclusive to new subscribers.

Join the Treehouse affiliate program and earn 25% recurring commission!

Newest
- Newest
- Active
- Unanswered
- Featured
All Topics

Aleksandar Vasilkov
Front End Web Development Techdegree Graduate 13,835 Points
No matter what kind of solution I come up with, the result is always "It looks like you changed or removed the provided"

Posted October 16, 2023 9:04pm by Aleksandar Vasilkov

Aleksandar Vasilkov
Front End Web Development Techdegree Graduate 13,835 Points
2 Answers
Michelle Villagran
228 Points
Function syntax help using reduce method

Posted June 28, 2023 8:14pm by Michelle Villagran

Michelle Villagran
228 Points
2 Answers
Joseph Quintiliano
Front End Web Development Techdegree Graduate 14,338 Points
Setting the reduce parameters into a variable and it wont accept it as an answer

Posted April 24, 2023 7:46pm by Joseph Quintiliano

Joseph Quintiliano
Front End Web Development Techdegree Graduate 14,338 Points
1 Answer
Joseph Quintiliano
Front End Web Development Techdegree Graduate 14,338 Points
why would the substring parameters be (0, 3) and not (0, 2) if i only want to return the first three letters?

Posted April 24, 2023 6:16pm by Joseph Quintiliano

Joseph Quintiliano
Front End Web Development Techdegree Graduate 14,338 Points
3 Answers
Samuel Kleos
Front End Web Development Techdegree Student 13,728 Points
Why doesn't parseInt(number).toString() work?

Posted February 21, 2023 12:57am by Samuel Kleos

Samuel Kleos
Front End Web Development Techdegree Student 13,728 Points
1 Answer
Samantha McElhinney
1,931 Points
I'm not sure why I'm getting the error identifier already defined when I'm reassigning the variable with const

Posted January 21, 2023 2:06am by Samantha McElhinney

Samantha McElhinney
1,931 Points
1 Answer
Peter Huang
5,427 Points
if map() the same as join()?

Posted January 2, 2023 4:09am by Peter Huang

Peter Huang
5,427 Points
2 Answers
Peter Huang
5,427 Points
Need help with this challenge

Posted December 24, 2022 9:50pm by Peter Huang

Peter Huang
5,427 Points
1 Answer
zkb
Front End Web Development Techdegree Graduate 13,636 Points
Can somebody help me figure out what's wrong with my code?

Posted December 12, 2022 7:11am by zkb

zkb
Front End Web Development Techdegree Graduate 13,636 Points
1 Answer
Ede Harrison
3,615 Points
map() with template literals in JavaScript

Posted September 29, 2022 11:40am by Ede Harrison

Ede Harrison
3,615 Points
1 Answer
Willie Morris
Front End Web Development Techdegree Graduate 14,717 Points
this gets the right answer but says its wrong?

Posted August 6, 2022 11:40pm by Willie Morris

Willie Morris
Front End Web Development Techdegree Graduate 14,717 Points
1 Answer
BETUL BASKAN
152 Points
const century20 = years.filter(number => number <= 2000); console.log(century20); why doesnt work?

Posted May 7, 2022 6:18am by BETUL BASKAN

BETUL BASKAN
152 Points
1 Answer
Cesar Garcia
Full Stack JavaScript Techdegree Student 5,184 Points
Reduce Method Question

Posted May 3, 2022 4:38am by Cesar Garcia

Cesar Garcia
Full Stack JavaScript Techdegree Student 5,184 Points
1 Answer
Seth Missiaen
Web Development Techdegree Graduate 21,652 Points
Another solution to total names that start with "G"

Posted April 15, 2022 6:44pm by Seth Missiaen

Seth Missiaen
Web Development Techdegree Graduate 21,652 Points
1 Answer
Cole Smith
Web Development Techdegree Student 13,802 Points
how do I properly return this new array?

Posted March 31, 2022 6:12pm by Cole Smith

Cole Smith
Web Development Techdegree Student 13,802 Points
1 Answer
karan Badhwar
Web Development Techdegree Graduate 18,136 Points
Radix?

Posted February 3, 2022 8:05am by karan Badhwar

karan Badhwar
Web Development Techdegree Graduate 18,136 Points
1 Answer
karan Badhwar
Web Development Techdegree Graduate 18,136 Points
How filter() or setTimeout() methods invoke functions without parenthesis

Posted February 3, 2022 6:22am by karan Badhwar

karan Badhwar
Web Development Techdegree Graduate 18,136 Points
1 Answer
Ronald Greer
Front End Web Development Techdegree Graduate 56,430 Points
Unsure how to abbreviate these values.

Posted December 22, 2021 2:20pm by Ronald Greer

Ronald Greer
Front End Web Development Techdegree Graduate 56,430 Points
1 Answer
Keytron Brown
15,828 Points
Help I dont know what to do next.

Posted October 31, 2021 6:15pm by Keytron Brown

Keytron Brown
15,828 Points
1 Answer
Shreemangal Sethi
Full Stack JavaScript Techdegree Student 15,552 Points
How do i check for equality?

Posted August 20, 2021 1:48am by Shreemangal Sethi

Shreemangal Sethi
Full Stack JavaScript Techdegree Student 15,552 Points
1 Answer
Frank keane
8,074 Points
Why the curly braces for arrow function?

Posted June 17, 2021 3:17pm by Frank keane

Frank keane
8,074 Points
1 Answer
Marquis Briggs
8,967 Points
Using reduce, return the total phone numbers with a 503 area code. Store the total in the variable numberOf503.

Posted June 15, 2021 8:21pm by Marquis Briggs

Marquis Briggs
8,967 Points
1 Answer
Muaaz Matwadia
Full Stack JavaScript Techdegree Graduate 19,327 Points
.reduce

Posted May 3, 2021 8:27am by Muaaz Matwadia

Muaaz Matwadia
Full Stack JavaScript Techdegree Graduate 19,327 Points
1 Answer
Muaaz Matwadia
Full Stack JavaScript Techdegree Graduate 19,327 Points
.return

Posted April 19, 2021 10:06am by Muaaz Matwadia

Muaaz Matwadia
Full Stack JavaScript Techdegree Graduate 19,327 Points
1 Answer
Hanwen Zhang
20,084 Points
Why my code is not working here using includes()? Thanks

Posted April 3, 2021 3:59pm by Hanwen Zhang

Hanwen Zhang
20,084 Points
1 Answer
Hanwen Zhang
20,084 Points
Why My code is not working here :( Please help!!

Posted April 3, 2021 3:47pm by Hanwen Zhang

Hanwen Zhang
20,084 Points
1 Answer
Hanwen Zhang
20,084 Points
Why my code is not working here?

Posted April 3, 2021 3:04pm by Hanwen Zhang

Hanwen Zhang
20,084 Points
1 Answer
Muaaz Matwadia
Full Stack JavaScript Techdegree Graduate 19,327 Points
if statment?

Posted March 26, 2021 2:43pm by Muaaz Matwadia

Muaaz Matwadia
Full Stack JavaScript Techdegree Graduate 19,327 Points
1 Answer
Joe Mbome
Front End Web Development Techdegree Graduate 17,250 Points
phoneNumbers is array of 10 digit phone numbers, where the first three digits, in parentheses, are area codes. Using red

Posted March 26, 2021 2:30pm by Joe Mbome

Joe Mbome
Front End Web Development Techdegree Graduate 17,250 Points
1 Answer
Rick S
11,273 Points
Unexpected identifier error given to me with next challenge

Posted February 26, 2021 7:33pm by Rick S

Rick S
11,273 Points
3 Answers

Prev Page 1 of 4 Next

Posting to the forum is only allowed for members with active accounts.
Please sign in or sign up to post.