Joern Lindner

Joern Lindner

Member Since February 11, 2015

13,472

Total Points

Points are earned whenever you take an important action on Treehouse.
Learn more about when and how points are earned.

178 Achievements

  • Achievement

    Hooking Up the Model to the View

    Build a Weather App

    Achieved

    May 16, 2020

    Hooking Up the Model to the View
  • Achievement

    Building the Weather UI

    Build a Weather App

    Achieved

    May 16, 2020

    Building the Weather UI
  • Achievement

    Concurrency and Error Handling

    Build a Weather App

    Achieved

    May 15, 2020

    Concurrency and Error Handling
  • Achievement

    Networking

    Build a Weather App

    Achieved

    May 14, 2020

    Networking
  • Achievement

    Exploring an API

    Build a Weather App

    Achieved

    May 14, 2020

    Exploring an API
  • Achievement

    Modelling Solitaire

    Kotlin for Java Developers

    Achieved

    May 10, 2020

    Modelling Solitaire
  • Achievement

    Hello Kotlin!

    Kotlin for Java Developers

    Achieved

    May 10, 2020

    Hello Kotlin!
  • Achievement

    Scripting Materials

    Materials in Unity

    Achieved

    Jan 18, 2017

    Scripting Materials
  • Achievement

    Additional Textures in the Standard Shader

    Materials in Unity

    Achieved

    Jan 17, 2017

    Additional Textures in the Standard Shader
  • Achievement

    Textures in the Standard Shader

    Materials in Unity

    Achieved

    Jan 15, 2017

    Textures in the Standard Shader
  • Achievement

    Understanding Materials

    Materials in Unity

    Achieved

    Jan 15, 2017

    Understanding Materials
  • Achievement

    Camera Switching

    Cameras in Unity

    Achieved

    Jan 15, 2017

    Camera Switching
  • Achievement

    Camera Movement

    Cameras in Unity

    Achieved

    Jan 15, 2017

    Camera Movement
  • Achievement

    Image Effects

    Cameras in Unity

    Achieved

    Jan 14, 2017

    Image Effects
  • Achievement

    Camera Basics

    Cameras in Unity

    Achieved

    Jan 14, 2017

    Camera Basics
  • Achievement

    Adding New Behavior

    Components in Unity

    Achieved

    Jan 14, 2017

    Adding New Behavior
  • Achievement

    Thinking in Components

    Components in Unity

    Achieved

    Jan 14, 2017

    Thinking in Components
  • Achievement

    Organizing Code into Methods

    Components in Unity

    Achieved

    Jan 14, 2017

    Organizing Code into Methods
  • Achievement

    Inheritance

    Object-Oriented Programming in Unity

    Achieved

    Jan 14, 2017

    Inheritance
  • Achievement

    Creating a Mobile Drop Down Menu

    jQuery Basics (2014)

    Achieved

    Aug 4, 2016

    Creating a Mobile Drop Down Menu
  • Achievement

    Creating a Simple Lightbox

    jQuery Basics (2014)

    Achieved

    Aug 3, 2016

    Creating a Simple Lightbox
  • Achievement

    Creating a Spoiler Revealer

    jQuery Basics (2014)

    Achieved

    Jul 31, 2016

    Creating a Spoiler Revealer
  • Achievement

    Introduction to jQuery

    jQuery Basics (2014)

    Achieved

    Jul 31, 2016

    Introduction to jQuery
  • Achievement

    JavaScript Objects

    JavaScript Loops, Arrays and Objects

    Achieved

    Jul 28, 2016

    JavaScript Objects
  • Achievement

    JavaScript Arrays

    JavaScript Loops, Arrays and Objects

    Achieved

    Mar 31, 2016

    JavaScript Arrays
  • Achievement

    JavaScript Loops

    JavaScript Loops, Arrays and Objects

    Achieved

    Mar 26, 2016

    JavaScript Loops
  • Achievement

    Getting Started with WordPress

    Getting Started with WordPress

    Achieved

    Mar 20, 2016

    Getting Started with WordPress
  • Achievement

    Introduction to SVG

    SVG Basics

    Achieved

    Mar 13, 2016

    Introduction to SVG
  • Achievement

    Building a Layout with Flexbox

    CSS Flexbox Layout

    Achieved

    Mar 13, 2016

    Building a Layout with Flexbox
  • Achievement

    Flexbox Properties

    CSS Flexbox Layout

    Achieved

    Mar 13, 2016

    Flexbox Properties
  • Achievement

    Understanding Flexbox

    CSS Flexbox Layout

    Achieved

    Mar 12, 2016

    Understanding Flexbox
  • Achievement

    Responsive Patterns

    Responsive Layouts

    Achieved

    Mar 12, 2016

    Responsive Patterns
  • Achievement

    Media Queries

    Responsive Layouts

    Achieved

    Mar 12, 2016

    Media Queries
  • Achievement

    Responsive Theory

    Responsive Layouts

    Achieved

    Mar 12, 2016

    Responsive Theory
  • Achievement

    Positioning Page Content

    CSS Layout Basics

    Achieved

    Mar 11, 2016

    Positioning Page Content
  • Achievement

    CSS Layout Project

    CSS Layout Basics

    Achieved

    Mar 11, 2016

    CSS Layout Project
  • Achievement

    Page Layout with the Float Property

    CSS Layout Basics

    Achieved

    Mar 10, 2016

    Page Layout with the Float Property
  • Achievement

    Controlling Layout with CSS Display Modes

    CSS Layout Basics

    Achieved

    Mar 6, 2016

    Controlling Layout with CSS Display Modes
  • Achievement

    Getting Started with CSS Layout

    CSS Layout Basics

    Achieved

    Mar 5, 2016

    Getting Started with CSS Layout
  • Achievement

    Animating and Saving Sprites

    Mobile Game Design

    Achieved

    Jan 3, 2016

    Animating and Saving Sprites
  • Achievement

    Designing Characters and a Scene

    Mobile Game Design

    Achieved

    Jan 3, 2016

    Designing Characters and a Scene
  • Achievement

    Introduction to Game Design

    Mobile Game Design

    Achieved

    Jan 3, 2016

    Introduction to Game Design
  • Achievement

    Build and Share a Unity Game

    How to Make a Video Game

    Achieved

    Jan 3, 2016

    Build and Share a Unity Game
  • Achievement

    Game Audio

    How to Make a Video Game

    Achieved

    Jan 3, 2016

    Game Audio
  • Achievement

    Score, Enemies, and Game State

    How to Make a Video Game

    Achieved

    Jan 2, 2016

    Score, Enemies, and Game State
  • Achievement

    Pickups

    How to Make a Video Game

    Achieved

    Dec 30, 2015

    Pickups
  • Achievement

    Player Input and Cameras

    How to Make a Video Game

    Achieved

    Dec 30, 2015

    Player Input and Cameras
  • Achievement

    Perfect

    C# Basics (Retired)

    Achieved

    Dec 27, 2015

    Perfect
  • Achievement

    Perform

    C# Basics (Retired)

    Achieved

    Nov 25, 2015

    Perform
  • Achievement

    Console I/O

    C# Basics (Retired)

    Achieved

    Nov 19, 2015

    Console I/O
  • Achievement

    Prepare and Plan

    C# Basics (Retired)

    Achieved

    Nov 18, 2015

    Prepare and Plan
  • Achievement

    The Unity Editor and Scene Setup

    How to Make a Video Game

    Achieved

    Oct 31, 2015

    The Unity Editor and Scene Setup
  • Achievement

    Harnessing the Power of Objects

    Java Objects (Retired)

    Achieved

    Oct 6, 2015

    Harnessing the Power of Objects
  • Achievement

    Introduction to Video Games

    How to Make a Video Game

    Achieved

    Sep 1, 2015

    Introduction to Video Games
  • Achievement

    Meet Objects

    Java Objects (Retired)

    Achieved

    Jun 2, 2015

    Meet Objects
  • Achievement

    Perfecting the Prototype

    Java Basics

    Achieved

    May 26, 2015

    Perfecting the Prototype
  • Achievement

    Using your New Tools

    Java Basics

    Achieved

    May 25, 2015

    Using your New Tools
  • Achievement

    Getting Started with Java

    Java Basics

    Achieved

    May 25, 2015

    Getting Started with Java
  • Achievement

    Creating Home Page Assets

    Illustrator Foundations

    Achieved

    May 14, 2015

    Creating Home Page Assets
  • Achievement

    How to Draw in Illustrator

    Illustrator Foundations

    Achieved

    May 13, 2015

    How to Draw in Illustrator
  • Achievement

    WWW

    How the Web Works

    Achieved

    May 9, 2015

    WWW
  • Achievement

    Displaying Our Weather Data

    Build a Weather App with Swift (Retired)

    Achieved

    May 9, 2015

    Displaying Our Weather Data
  • Achievement

    Data Modeling With Structures

    Build a Weather App with Swift (Retired)

    Achieved

    May 9, 2015

    Data Modeling With Structures
  • Achievement

    Concurrency

    Build a Weather App with Swift (Retired)

    Achieved

    May 9, 2015

    Concurrency
  • Achievement

    Pulling Data From the Web

    Build a Weather App with Swift (Retired)

    Achieved

    Apr 18, 2015

    Pulling Data From the Web
  • Achievement

    Refactoring Our Code (Swift)

    Build a Playlist Browser with Swift

    Achieved

    Apr 18, 2015

    Refactoring Our Code (Swift)
  • Achievement

    Building the Master and Detail Views (Swift)

    Build a Playlist Browser with Swift

    Achieved

    Apr 17, 2015

    Building the Master and Detail Views (Swift)
  • Achievement

    Building a Music Library and Playlists (Swift)

    Build a Playlist Browser with Swift

    Achieved

    Apr 17, 2015

    Building a Music Library and Playlists (Swift)
  • Achievement

    Using a Navigation Controller With Segues (Swift)

    Build a Playlist Browser with Swift

    Achieved

    Apr 16, 2015

    Using a Navigation Controller With Segues (Swift)
  • Achievement

    Working With Multiple View Controllers (Swift)

    Build a Playlist Browser with Swift

    Achieved

    Apr 16, 2015

    Working With Multiple View Controllers (Swift)
  • Achievement

    Deploying to a Device

    Build a Simple iPhone App with Swift

    Achieved

    Apr 16, 2015

    Deploying to a Device
  • Achievement

    Debugging Our App

    Build a Simple iPhone App with Swift

    Achieved

    Apr 16, 2015

    Debugging Our App
  • Achievement

    Improving Our User Interface

    Build a Simple iPhone App with Swift

    Achieved

    Apr 16, 2015

    Improving Our User Interface
  • Achievement

    Using a Data Model

    Build a Simple iPhone App with Swift

    Achieved

    Apr 16, 2015

    Using a Data Model
  • Achievement

    Views and View Controllers

    Build a Simple iPhone App with Swift

    Achieved

    Apr 15, 2015

    Views and View Controllers
  • Achievement

    Swift Value vs Reference Types

    Object-Oriented Swift

    Achieved

    Apr 15, 2015

    Swift Value vs Reference Types
  • Achievement

    Swift Properties

    Object-Oriented Swift

    Achieved

    Apr 14, 2015

    Swift Properties
  • Achievement

    Swift Inheritance

    Object-Oriented Swift

    Achieved

    Apr 14, 2015

    Swift Inheritance
  • Achievement

    Swift Classes and Objects

    Object-Oriented Swift

    Achieved

    Apr 13, 2015

    Swift Classes and Objects
  • Achievement

    Swift Structs and their Methods

    Swift Enums and Structs

    Achieved

    Apr 13, 2015

    Swift Structs and their Methods
  • Achievement

    Swift Structs

    Swift Enums and Structs

    Achieved

    Apr 13, 2015

    Swift Structs
  • Achievement

    Swift Enums and their Methods

    Swift Enums and Structs

    Achieved

    Apr 13, 2015

    Swift Enums and their Methods
  • Achievement

    Swift Enums

    Swift Enums and Structs

    Achieved

    Apr 12, 2015

    Swift Enums
  • Achievement

    Swift Optionals

    Swift Functions and Optionals

    Achieved

    Apr 12, 2015

    Swift Optionals
  • Achievement

    Swift Parameters and Tuples

    Swift Functions and Optionals

    Achieved

    Apr 12, 2015

    Swift Parameters and Tuples
  • Achievement

    Swift Functions

    Swift Functions and Optionals

    Achieved

    Apr 12, 2015

    Swift Functions
  • Achievement

    What is User Experience (UX)?

    UX Basics

    Achieved

    Apr 12, 2015

    What is User Experience (UX)?
  • Achievement

    Design Foundations Final

    Design Foundations

    Achieved

    Apr 11, 2015

    Design Foundations Final
  • Achievement

    Becoming a Problem Solver

    Design Foundations

    Achieved

    Apr 11, 2015

    Becoming a Problem Solver
  • Achievement

    Understanding Aesthetics

    Design Foundations

    Achieved

    Apr 11, 2015

    Understanding Aesthetics
  • Achievement

    Introduction to Design

    Design Foundations

    Achieved

    Apr 11, 2015

    Introduction to Design
  • Achievement

    Grid Layout

    CSS Layout Techniques

    Achieved

    Apr 11, 2015

    Grid Layout
  • Achievement

    Flexbox Layout

    CSS Layout Techniques

    Achieved

    Apr 11, 2015

    Flexbox Layout
  • Achievement

    Positioning Schemes

    CSS Layout Techniques

    Achieved

    Apr 10, 2015

    Positioning Schemes
  • Achievement

    Float Layout

    CSS Layout Techniques

    Achieved

    Apr 10, 2015

    Float Layout
  • Achievement

    Adding Color and Type

    Illustrator Foundations

    Achieved

    Apr 10, 2015

    Adding Color and Type
  • Achievement

    Display Modes

    CSS Layout Techniques

    Achieved

    Apr 9, 2015

    Display Modes
  • Achievement

    Ruby Arrays

    Ruby Collections

    Achieved

    Mar 30, 2015

    Ruby Arrays
  • Achievement

    Ruby Logical Operators

    Ruby Operators and Control Structures

    Achieved

    Mar 28, 2015

    Ruby Logical Operators
  • Achievement

    Ruby Control Structures

    Ruby Operators and Control Structures

    Achieved

    Mar 28, 2015

    Ruby Control Structures
  • Achievement

    Ruby Operators

    Ruby Operators and Control Structures

    Achieved

    Mar 28, 2015

    Ruby Operators
  • Achievement

    Installing a Ruby Development Environment

    Installing a Ruby Development Environment

    Achieved

    Mar 26, 2015

    Installing a Ruby Development Environment
  • Achievement

    Workflows

    Git Basics

    Achieved

    Mar 23, 2015

    Workflows
  • Achievement

    Working With Remote Repositories

    Git Basics

    Achieved

    Mar 23, 2015

    Working With Remote Repositories
  • Achievement

    Merging

    Git Basics

    Achieved

    Mar 23, 2015

    Merging
  • Achievement

    Branches

    Git Basics

    Achieved

    Mar 23, 2015

    Branches
  • Achievement

    Getting Started With Git

    Git Basics

    Achieved

    Mar 23, 2015

    Getting Started With Git
  • Achievement

    Why Version Control Matters

    Git Basics

    Achieved

    Mar 22, 2015

    Why Version Control Matters
  • Achievement

    Control Flow

    Swift Basics (retired)

    Achieved

    Mar 22, 2015

    Control Flow
  • Achievement

    Collections

    Swift Basics (retired)

    Achieved

    Mar 22, 2015

    Collections
  • Achievement

    Operators

    Swift Basics (retired)

    Achieved

    Mar 22, 2015

    Operators
  • Achievement

    Types

    Swift Basics (retired)

    Achieved

    Mar 22, 2015

    Types
  • Achievement

    Variables and Constants

    Swift Basics (retired)

    Achieved

    Mar 22, 2015

    Variables and Constants
  • Achievement

    Installing Programs

    Console Foundations

    Achieved

    Mar 21, 2015

    Installing Programs
  • Achievement

    Environment and Redirection

    Console Foundations

    Achieved

    Mar 21, 2015

    Environment and Redirection
  • Achievement

    Console Processes

    Console Foundations

    Achieved

    Mar 17, 2015

    Console Processes
  • Achievement

    Console Users and Permission

    Console Foundations

    Achieved

    Mar 17, 2015

    Console Users and Permission
  • Achievement

    Moving Around in the Console

    Console Foundations

    Achieved

    Mar 17, 2015

    Moving Around in the Console
  • Achievement

    JavaScript Functions

    JavaScript Basics (Retired)

    Achieved

    Mar 17, 2015

    JavaScript Functions
  • Achievement

    JavaScript Conditional Statements

    JavaScript Basics (Retired)

    Achieved

    Mar 16, 2015

    JavaScript Conditional Statements
  • Achievement

    JavaScript Numbers

    JavaScript Basics (Retired)

    Achieved

    Mar 15, 2015

    JavaScript Numbers
  • Achievement

    JavaScript Variables

    JavaScript Basics (Retired)

    Achieved

    Mar 12, 2015

    JavaScript Variables
  • Achievement

    Deleting Data

    Build a Diary App Using Core Data

    Achieved

    Mar 9, 2015

    Deleting Data
  • Achievement

    Listing Data using NSFetchedResultsController

    Build a Diary App Using Core Data

    Achieved

    Mar 8, 2015

    Listing Data using NSFetchedResultsController
  • Achievement

    Inserting and Saving Data

    Build a Diary App Using Core Data

    Achieved

    Mar 8, 2015

    Inserting and Saving Data
  • Achievement

    Understanding Core Data

    Build a Diary App Using Core Data

    Achieved

    Mar 8, 2015

    Understanding Core Data
  • Achievement

    Introducing JavaScript

    JavaScript Basics (Retired)

    Achieved

    Mar 8, 2015

    Introducing JavaScript
  • Achievement

    Ruby Methods

    Ruby Basics (Retired)

    Achieved

    Mar 7, 2015

    Ruby Methods
  • Achievement

    Ruby Numbers (Ruby Basics)

    Ruby Basics (Retired)

    Achieved

    Mar 7, 2015

    Ruby Numbers (Ruby Basics)
  • Achievement

    Ruby Strings (Ruby Basics)

    Ruby Basics (Retired)

    Achieved

    Mar 7, 2015

    Ruby Strings (Ruby Basics)
  • Achievement

    How Ruby Works

    Ruby Basics (Retired)

    Achieved

    Mar 7, 2015

    How Ruby Works
  • Achievement

    Structuring Tables

    HTML Tables

    Achieved

    Mar 7, 2015

    Structuring Tables
  • Achievement

    Table Basics

    HTML Tables

    Achieved

    Mar 7, 2015

    Table Basics
  • Achievement

    Choosing Options

    HTML Forms

    Achieved

    Mar 4, 2015

    Choosing Options
  • Achievement

    Computer Languages

    Computer Basics

    Achieved

    Mar 3, 2015

    Computer Languages
  • Achievement

    Computer Basics

    Computer Basics

    Achieved

    Mar 3, 2015

    Computer Basics
  • Achievement

    Organizing Forms

    HTML Forms

    Achieved

    Mar 3, 2015

    Organizing Forms
  • Achievement

    Form Basics

    HTML Forms

    Achieved

    Mar 3, 2015

    Form Basics
  • Achievement

    Advanced Selectors

    CSS Selectors

    Achieved

    Feb 28, 2015

    Advanced Selectors
  • Achievement

    Going Further with Attribute Selectors and Pseudo-Classes

    CSS Selectors

    Achieved

    Feb 28, 2015

    Going Further with Attribute Selectors and Pseudo-Classes
  • Achievement

    Creating an Icon

    Illustrator Foundations

    Achieved

    Feb 26, 2015

    Creating an Icon
  • Achievement

    Introduction to Illustrator

    Illustrator Foundations

    Achieved

    Feb 26, 2015

    Introduction to Illustrator
  • Achievement

    PHP Datatypes

    PHP Basics (Retired)

    Achieved

    Feb 26, 2015

    PHP Datatypes
  • Achievement

    Selectors - Beyond the Basics

    CSS Selectors

    Achieved

    Feb 25, 2015

    Selectors - Beyond the Basics
  • Achievement

    PHP Data & Structure

    PHP Basics (Retired)

    Achieved

    Feb 25, 2015

    PHP Data & Structure
  • Achievement

    PHP Getting Started

    PHP Basics (Retired)

    Achieved

    Feb 24, 2015

    PHP Getting Started
  • Achievement

    Forms

    HTML

    Achieved

    Feb 24, 2015

    Forms
  • Achievement

    Tables

    HTML

    Achieved

    Feb 24, 2015

    Tables
  • Achievement

    Objects

    HTML

    Achieved

    Feb 24, 2015

    Objects
  • Achievement

    Links

    HTML

    Achieved

    Feb 24, 2015

    Links
  • Achievement

    Lists

    HTML

    Achieved

    Feb 24, 2015

    Lists
  • Achievement

    Text

    HTML

    Achieved

    Feb 24, 2015

    Text
  • Achievement

    Introduction

    HTML

    Achieved

    Feb 24, 2015

    Introduction
  • Achievement

    Finalizing the Project

    Brand Identity Basics

    Achieved

    Feb 23, 2015

    Finalizing the Project
  • Achievement

    Case Studies and Examples

    Brand Identity Basics

    Achieved

    Feb 23, 2015

    Case Studies and Examples
  • Achievement

    The Brand Identity Design Process

    Brand Identity Basics

    Achieved

    Feb 23, 2015

    The Brand Identity Design Process
  • Achievement

    Introduction to Brand Identity

    Brand Identity Basics

    Achieved

    Feb 23, 2015

    Introduction to Brand Identity
  • Achievement

    The Logo Sprint

    Logo Design Basics

    Achieved

    Feb 23, 2015

    The Logo Sprint
  • Achievement

    Logo Design 101

    Logo Design Basics

    Achieved

    Feb 23, 2015

    Logo Design 101
  • Achievement

    Fundamental Concepts

    CSS Basics (2014)

    Achieved

    Feb 23, 2015

    Fundamental Concepts
  • Achievement

    Designing with the Latest Features

    CSS Basics (2014)

    Achieved

    Feb 23, 2015

    Designing with the Latest Features
  • Achievement

    Basic Layout

    CSS Basics (2014)

    Achieved

    Feb 22, 2015

    Basic Layout
  • Achievement

    Getting Started with Xcode

    Build a Simple iPhone App with Swift

    Achieved

    Feb 22, 2015

    Getting Started with Xcode
  • Achievement

    The Box Model

    CSS Basics (2014)

    Achieved

    Feb 20, 2015

    The Box Model
  • Achievement

    Understanding Values and Units

    CSS Basics (2014)

    Achieved

    Feb 20, 2015

    Understanding Values and Units
  • Achievement

    Basic Selectors

    CSS Basics (2014)

    Achieved

    Feb 17, 2015

    Basic Selectors
  • Achievement

    Getting Started with CSS

    CSS Basics (2014)

    Achieved

    Feb 14, 2015

    Getting Started with CSS
  • Achievement

    Debugging HTML and CSS Problems

    How to Make a Website

    Achieved

    Feb 14, 2015

    Debugging HTML and CSS Problems
  • Achievement

    Sharing a Website

    How to Make a Website

    Achieved

    Feb 14, 2015

    Sharing a Website
  • Achievement

    Responsive Web Design and Testing

    How to Make a Website

    Achieved

    Feb 14, 2015

    Responsive Web Design and Testing
  • Achievement

    Adding Pages to a Website

    How to Make a Website

    Achieved

    Feb 14, 2015

    Adding Pages to a Website
  • Achievement

    Styling Web Pages and Navigation

    How to Make a Website

    Achieved

    Feb 14, 2015

    Styling Web Pages and Navigation
  • Achievement

    Customizing Colors and Fonts

    How to Make a Website

    Achieved

    Feb 14, 2015

    Customizing Colors and Fonts
  • Achievement

    CSS: Cascading Style Sheets

    How to Make a Website

    Achieved

    Feb 12, 2015

    CSS: Cascading Style Sheets
  • Achievement

    Creating HTML Content

    How to Make a Website

    Achieved

    Feb 12, 2015

    Creating HTML Content
  • Achievement

    HTML First

    How to Make a Website

    Achieved

    Feb 11, 2015

    HTML First
  • Achievement

    Beginning HTML and CSS

    How to Make a Website

    Achieved

    Feb 11, 2015

    Beginning HTML and CSS
  • Achievement

    Newbie

    Achieved

    Feb 11, 2015

    Newbie