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
  • Grant Hosticka
    Grant Hosticka
    4,172 Points

    Extra Credit

    Posted September 4, 2014 10:55pm by Grant Hosticka
    Grant Hosticka
    4,172 Points
    • iOS
    • Build a Simple iPhone App (iOS7)
    • Creating a Data Collection
    • @property and NSArray

    2 Answers

  • hunche
    hunche
    3,339 Points

    Quiz question 4 of 5.Fill in the blank below.

    Posted August 5, 2014 5:38pm by hunche
    hunche
    3,339 Points
    • iOS
    • Build a Simple iPhone App (iOS7)
    • Creating a Data Collection
    • @property and NSArray

    1 Answer

  • hunche
    hunche
    3,339 Points

    Quiz question 1 of 5. Fill in the blank below

    Posted August 5, 2014 5:34pm by hunche
    hunche
    3,339 Points
    • iOS
    • Build a Simple iPhone App (iOS7)
    • Creating a Data Collection
    • @property and NSArray

    2 Answers

  • mariayounes
    mariayounes
    6,704 Points

    Answer toQuiz # 3

    Posted May 27, 2014 3:46pm by mariayounes
    mariayounes
    6,704 Points
    • iOS
    • Build a Simple iPhone App (iOS7)
    • Creating a Data Collection
    • @property and NSArray

    1 Answer

  • jordan dunin
    jordan dunin
    1,199 Points

    properties 2 things

    Posted May 4, 2014 1:49pm by jordan dunin
    jordan dunin
    1,199 Points
    • iOS
    • Build a Simple iPhone App (iOS7)
    • Creating a Data Collection
    • @property and NSArray

    1 Answer

  • Pallavi Polisetty
    PLUS
    Pallavi Polisetty
    Courses Plus Student 1,423 Points

    --------- tells the compiler that you are not using multi-threading for your property.

    Posted February 10, 2014 4:27pm by Pallavi Polisetty
    Pallavi Polisetty
    Courses Plus Student 1,423 Points
    • iOS
    • Build a Simple iPhone App (iOS7)
    • Creating a Data Collection
    • @property and NSArray

    3 Answers

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