Skip to main content

🚀 In our NEW AI Bootcamp you'll build a working app in 28 days, no experience required. Free to all subscription levels.

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

✨ Earn college credits in Cybersecurity, JS, HTML, CSS and Python

  • Treehouse Logo
    • For Individuals
    • For Businesses
    • For Schools
    • For Libraries
    • For Military
    • All Courses
    • Tracks
    • AI Bootcamp
    • College Credit
    • Techdegree Bootcamps
    • Front End Development
    • Full Stack JavaScript
    • Code Adventures
    • Discord
    • Forum
    • Success Stories
    • Treehouse Links
    • 100 Days of Code
    • Explore
    • Career Toolbox
    • Free Treehouse Near Me
    • Affiliates
    • Blog
    • Support
    • About
    • Learn
    • Beginner's Guide to Coding
    • Data Analysis with SQL & Python
    • Front-End Web Development
    • Python Programming Basics
    • Techdegree Bootcamp Overview
    • UX Design Fundamentals
    • AI Tools for Beginners
  • For Individuals For Businesses For Schools For Libraries For Military
  • All Courses Tracks AI Bootcamp College Credit
  • Techdegree Bootcamps Front End Web Development Full Stack JavaScript
  • Code Adventures Discord Forum Success Stories Treehouse Links 100 Days of Code
  • Explore Career Toolbox Free Treehouse Near Me Affiliates Blog Support About
    Learn Beginner's Guide to Coding Data Analysis with SQL & Python Front-End Web Development Python Programming Basics Techdegree Bootcamp Overview UX Design Fundamentals AI Tools for Beginners
  • Sign In
  • Free Trial
Instagram Twitter Facebook YouTube LinkedIn
Loading banner... Start your free trial at Treehouse
    • Newest
      • Newest
      • Active
      • Unanswered
      • Featured
    • All Topics
      • All Topics
      • • General Discussion
      • • AI
      • • APIs
      • • Coding for Kids
      • • College Credit
      • • Computer Science
      • • CSS
      • • Data Analysis
      • • Databases
      • • Design
      • • Development Tools
      • • Digital Literacy
      • • Game Development
      • • Go Language
      • • HTML
      • • Java
      • • JavaScript
      • • Learning Resources
      • • Machine Learning
      • • No-Code
      • • PHP
      • • Professional Growth
      • • Python
      • • Quality Assurance
      • • React
      • • Ruby
      • • Security
      • • Swift
      • • Vibe Coding
  • Andy McDonald
    seal-mask
    .a{fill-rule:evenodd;}techdegree seal-36
    Andy McDonald
    Python Development Techdegree Graduate 13,801 Points

    Seems to be working but I'm not passing

    Posted September 6, 2021 12:11am by Andy McDonald
    .a{fill-rule:evenodd;}techdegree seal-36
    Andy McDonald
    Python Development Techdegree Graduate 13,801 Points
    • Python
    • Functional Python
    • The Lambda Lambada
    • Lambda 2

    1 Answer

  • Andy McDonald
    seal-mask
    .a{fill-rule:evenodd;}techdegree seal-36
    Andy McDonald
    Python Development Techdegree Graduate 13,801 Points

    give_me_this....?????????????????????

    Posted September 3, 2021 6:00am by Andy McDonald
    .a{fill-rule:evenodd;}techdegree seal-36
    Andy McDonald
    Python Development Techdegree Graduate 13,801 Points
    • Python
    • Functional Python
    • The Lambda Lambada
    • Lambda 2

    1 Answer

  • Emily Strobl
    Emily Strobl
    5,429 Points

    Lambda 2 Challenge

    Posted January 16, 2020 5:47pm by Emily Strobl
    Emily Strobl
    5,429 Points
    • Python
    • Functional Python
    • The Lambda Lambada
    • Lambda 2

    1 Answer

  • Aamir Mirza
    Aamir Mirza
    25,077 Points

    Treehouse says I "Didn't get the right string" even though I did?

    Posted October 9, 2019 5:51pm by Aamir Mirza
    Aamir Mirza
    25,077 Points
    • Python
    • Functional Python
    • The Lambda Lambada
    • Lambda 2

    1 Answer

  • Christian Lamoureux
    seal-mask
    .a{fill-rule:evenodd;}techdegree
    Christian Lamoureux
    Full Stack JavaScript Techdegree Student 22,669 Points

    Lambda 2. Code picked the right sentence but claims I didn't use reduce and a lambda.

    Posted July 20, 2018 12:40am by Christian Lamoureux
    .a{fill-rule:evenodd;}techdegree
    Christian Lamoureux
    Full Stack JavaScript Techdegree Student 22,669 Points
    • Python
    • Functional Python
    • The Lambda Lambada
    • Lambda 2

    3 Answers

  • Nancy Melucci
    PLUS
    Nancy Melucci
    Courses Plus Student 36,809 Points

    Lambda takes 1 positional argument, reduce takes 2

    Posted January 13, 2017 3:53pm by Nancy Melucci
    Nancy Melucci
    Courses Plus Student 36,809 Points
    • Python
    • Functional Python
    • The Lambda Lambada
    • Lambda 2

    3 Answers

  • Bartlomiej Damek
    Bartlomiej Damek
    12,132 Points

    Use reduce() and a lambda to find the longest string in strings. Save this value in the variable

    Posted June 7, 2016 9:27pm by Bartlomiej Damek
    Bartlomiej Damek
    12,132 Points
    • Python
    • Functional Python
    • The Lambda Lambada
    • Lambda 2

    4 Answers

  • Stefan Vaziri
    Stefan Vaziri
    17,453 Points

    Using the if, else statement with reduce() and lambda()

    Posted February 24, 2016 7:41pm by Stefan Vaziri
    Stefan Vaziri
    17,453 Points
    • Python
    • Functional Python
    • The Lambda Lambada
    • Lambda 2

    3 Answers

  • mattamorphic
    PLUS
    mattamorphic
    Courses Plus Student 6,641 Points

    Functional Python : Lambdas

    Posted September 5, 2015 2:58pm by mattamorphic
    mattamorphic
    Courses Plus Student 6,641 Points
    • Python
    • Functional Python
    • The Lambda Lambada
    • Lambda 2

    1 Answer

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

Techdegree

  • Front End Web Development
  • Full Stack JavaScript
SEE ALL

Tracks

  • Learn to Code for Beginners
  • Beginning Python
  • Beginning SQL
  • Beginning Java
SEE ALL

Courses

  • JavaScript Basics
  • Intro to HTML & CSS
  • Python Basics
  • CSS Layout
SEE ALL

About Us

  • About
  • Blog
  • Community
  • Stories
  • Contact
  • Gift Card

Explore

  • Plans
  • Affiliates
  • Perks
  • Shop
  • Free Treehouse Near Me
  • Treehouse for Libraries
  • Treehouse for Businesses

Treehouse is an online technology education platform founded in 2011. Treehouse offers more than 700 self-paced, video-based courses in web development, programming, data analysis, design, and AI, plus two project-based bootcamp programs in Front End Web Development and Full Stack JavaScript. Individual Treehouse plans start at $25 per month and include a 7-day free trial. Treehouse serves individual learners, businesses, schools, and public libraries. Cardholders at participating U.S. public libraries can use Treehouse for free. Select Treehouse courses, offered with University Pathways International, are recommended for college credit by ACE and NCCRS. Treehouse learners earn digital certificates for completed Tracks.

Terms & Conditions · Privacy · © 2026 Treehouse Island, Inc.
  • Twitter
  • YouTube
  • Facebook
  • LinkedIn
  • Instagram
  • Discord