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Erik Linden

Member Since June 25, 2014

14,313

Total Points

•
4,070

Python

4039 pts
Achievements

31 pts
Forum
•
2,050

CSS

2050 pts
Achievements

0 pts
Forum
•
1,882

HTML

1882 pts
Achievements

0 pts
Forum
•
1,547

Databases

1547 pts
Achievements

0 pts
Forum
•
1,060

PHP

1060 pts
Achievements

0 pts
Forum
•
776

Security

776 pts
Achievements

0 pts
Forum
•
549

JavaScript

549 pts
Achievements

0 pts
Forum
•
502

Digital Literacy

502 pts
Achievements

0 pts
Forum
•
241

Computer Science

241 pts
Achievements

0 pts
Forum
•
60

Development Tools

60 pts
Achievements

0 pts
Forum
•
30

Data Analysis

30 pts
Achievements

0 pts
Forum
•
6

Design

6 pts
Achievements

0 pts
Forum

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

162 Achievements

Achievement
Recursion and Space Complexity

Introduction to Algorithms

Achieved
Apr 1, 2023
Achievement
Algorithms in Code

Introduction to Algorithms

Achieved
Apr 1, 2023
Achievement
Time Complexity

Introduction to Algorithms

Achieved
Mar 31, 2023
Achievement
Playing a Counting Game

Introduction to Algorithms

Achieved
Mar 31, 2023
Achievement
Vulnerabilities: Configuration, Components, and Logging

OWASP Top 10 Vulnerabilities

Achieved
Mar 31, 2023
Achievement
Vulnerabilities: Authentication, Access, and Sensitive Data

OWASP Top 10 Vulnerabilities

Achieved
Mar 31, 2023
Achievement
Vulnerabilities: Injection, XSS, CSRF

OWASP Top 10 Vulnerabilities

Achieved
Mar 31, 2023
Achievement
The OWASP Top 10 Explained

OWASP Top 10 Vulnerabilities

Achieved
Mar 30, 2023
Achievement
Maintaining Secure Web Apps

Introduction to Application Security

Achieved
Mar 30, 2023
Achievement
Protecting Data and Keeping Attackers Out

Introduction to Application Security

Achieved
Mar 30, 2023
Achievement
Why Protect Your Web Apps

Introduction to Application Security

Achieved
Mar 29, 2023
Achievement
Security: Solutions

Introduction to Data Security

Achieved
Mar 28, 2023
Achievement
Security: Concerns

Introduction to Data Security

Achieved
Mar 28, 2023
Achievement
Security in Practice

Security Literacy

Achieved
Mar 28, 2023
Achievement
Common Attacks and Defenses

Security Literacy

Achieved
Mar 28, 2023
Achievement
Hello Internet!

Security Literacy

Achieved
Mar 28, 2023
Achievement
Day 3: Getting Creative

SQL Reporting by Example

Achieved
Mar 27, 2023
Achievement
Day 2: Advanced Selecting

SQL Reporting by Example

Achieved
Mar 27, 2023
Achievement
Day 1: Joining Tables

SQL Reporting by Example

Achieved
Mar 26, 2023
Achievement
Orientation: Selecting Data

SQL Reporting by Example

Achieved
Mar 25, 2023
Achievement
Subqueries

Querying Relational Databases

Achieved
Mar 22, 2023
Achievement
Set Operations

Querying Relational Databases

Achieved
Mar 20, 2023
Achievement
Joining Table Data with SQL

Querying Relational Databases

Achieved
Mar 19, 2023
Achievement
Table Relationships

Querying Relational Databases

Achieved
Mar 16, 2023
Achievement
Database Keys

Querying Relational Databases

Achieved
Mar 16, 2023
Achievement
Database Normalization

Querying Relational Databases

Achieved
Mar 15, 2023
Achievement
Date and Time Functions

Reporting with SQL

Achieved
Mar 15, 2023
Achievement
Aggregate and Numeric Functions

Reporting with SQL

Achieved
Mar 14, 2023
Achievement
Working with Text

Reporting with SQL

Achieved
Mar 14, 2023
Achievement
Creating and Modifying Database Tables

Creating and Modifying Database Tables

Achieved
Mar 14, 2023
Achievement
Ordering, Limiting and Paging Results

Reporting with SQL

Achieved
Mar 13, 2023
Achievement
Handling Errors When Manipulating Data

Modifying Data with SQL

Achieved
Mar 13, 2023
Achievement
Deleting Data from a Database

Modifying Data with SQL

Achieved
Mar 13, 2023
Achievement
Updating Data in a Database

Modifying Data with SQL

Achieved
Mar 13, 2023
Achievement
Adding Data to a Database

Modifying Data with SQL

Achieved
Mar 13, 2023
Achievement
Finding the Data You Want

SQL Basics

Achieved
Mar 13, 2023
Achievement
Getting Data from a Database

SQL Basics

Achieved
Feb 19, 2023
Achievement
Data, Databases and SQL

SQL Basics

Achieved
Feb 19, 2023
Achievement
PHP Inventory

Build a Basic PHP Website

Achieved
Feb 19, 2023
Achievement
PHP Includes

Build a Basic PHP Website

Achieved
Feb 19, 2023
Achievement
PHP Internal Functions

PHP Functions

Achieved
Feb 13, 2023
Achievement
PHP Returns & Closures

PHP Functions

Achieved
Feb 13, 2023
Achievement
PHP Functions Basics

PHP Functions

Achieved
Feb 13, 2023
Achievement
PHP Loops

PHP Arrays and Control Structures

Achieved
Feb 13, 2023
Achievement
PHP Arrays

PHP Arrays and Control Structures

Achieved
Feb 13, 2023
Achievement
PHP Conditionals

PHP Arrays and Control Structures

Achieved
Feb 13, 2023
Achievement
Going Further with HTML

HTML Basics

Achieved
Feb 12, 2023
Achievement
Images, Text and Links

HTML Basics

Achieved
Feb 12, 2023
Achievement
PHP on the Web

PHP Basics

Achieved
Feb 12, 2023
Achievement
Daily Exercise Program

PHP Basics

Achieved
Feb 11, 2023
Achievement
Unit Converter

PHP Basics

Achieved
Feb 11, 2023
Achievement
Getting to Know PHP

PHP Basics

Achieved
Feb 11, 2023
Achievement
CSS Media Queries

CSS Layout

Achieved
Feb 11, 2023
Achievement
CSS Layout Techniques

CSS Layout

Achieved
Feb 11, 2023
Achievement
Box Model Concepts

CSS Layout

Achieved
Feb 10, 2023
Achievement
The CSS Box Model

CSS Layout

Achieved
Feb 10, 2023
Achievement
Fundamental Concepts

CSS Basics

Achieved
Feb 10, 2023
Achievement
Understanding Values and Units

CSS Basics

Achieved
Feb 10, 2023
Achievement
Basic Selectors

CSS Basics

Achieved
Feb 10, 2023
Achievement
Getting Started with CSS

CSS Basics

Achieved
Feb 9, 2023
Achievement
Welcome to OOP

Basic Object-Oriented Python

Achieved
May 26, 2021
Achievement
Working With Strings

JavaScript Basics

Achieved
Oct 2, 2020
Achievement
Storing and Tracking Information with Variables

JavaScript Basics

Achieved
Oct 2, 2020
Achievement
Hello, JavaScript!

JavaScript Basics

Achieved
Oct 1, 2020
Achievement
Iterating and Packing with Dictionaries

Introducing Dictionaries

Achieved
Sep 20, 2020
Achievement
Introducing Dictionaries

Introducing Dictionaries

Achieved
Sep 20, 2020
Achievement
Sequence Operations

Python Sequences

Achieved
Sep 20, 2020
Achievement
Sequence Iterations

Python Sequences

Achieved
Sep 20, 2020
Achievement
Packing and Unpacking

Functions, Packing, and Unpacking

Achieved
Sep 20, 2020
Achievement
Getting Info In and Out of Functions

Functions, Packing, and Unpacking

Achieved
Sep 20, 2020
Achievement
Introduction to Functions

Functions, Packing, and Unpacking

Achieved
Sep 20, 2020
Achievement
Getting to Know Tuples

Introducing Tuples

Achieved
Sep 20, 2020
Achievement
Timezones

Dates and Times in Python (2014)

Achieved
Sep 20, 2020
Achievement
Structuring Your Content

HTML Basics

Achieved
May 8, 2020
Achievement
Getting Started With HTML

HTML Basics

Achieved
May 6, 2020
Achievement
Adding a New Web Page

Introduction to HTML and CSS (2016)

Achieved
May 1, 2020
Achievement
Make It Beautiful with CSS

Introduction to HTML and CSS (2016)

Achieved
Apr 28, 2020
Achievement
HTML: The Structural Foundation of Web Pages and Applications

Introduction to HTML and CSS (2016)

Achieved
Apr 27, 2020
Achievement
Getting Familiar with HTML and CSS

Introduction to HTML and CSS (2016)

Achieved
Apr 23, 2020
Achievement
Structuring Tables

HTML Tables

Achieved
Apr 21, 2020
Achievement
Table Basics

HTML Tables

Achieved
Apr 20, 2020
Achievement
Choosing Options

HTML Forms

Achieved
Apr 17, 2020
Achievement
Organizing Forms

HTML Forms

Achieved
Apr 14, 2020
Achievement
Form Basics

HTML Forms

Achieved
Apr 13, 2020
Achievement
Treehouse Club - JavaScript

Treehouse Club: JavaScript

Achieved
Apr 9, 2020
Achievement
Treehouse Club - CSS

Treehouse Club: CSS

Achieved
Apr 8, 2020
Achievement
Welcome to the Treehouse Club

Treehouse Club: HTML

Achieved
Apr 6, 2020
Achievement
WWW

How the Web Works

Achieved
Apr 3, 2020
Achievement
Computer Languages

Computer Basics

Achieved
Apr 2, 2020
Achievement
Computer Basics

Computer Basics

Achieved
Mar 31, 2020
Achievement
Finishing the Game

Introducing JavaScript

Achieved
Mar 31, 2020
Achievement
Introducing JavaScript

Introducing JavaScript

Achieved
Mar 30, 2020
Achievement
Math Quiz App

Dates and Times in Python (2014)

Achieved
Oct 4, 2019
Achievement
Dates and Times

Dates and Times in Python (2014)

Achieved
Feb 24, 2019
Achievement
Python File Systems Project Starter

Python for File Systems

Achieved
Feb 24, 2019
Achievement
Python File Systems Manipulation

Python for File Systems

Achieved
Feb 23, 2019
Achievement
Python File Systems Navigation

Python for File Systems

Achieved
Feb 23, 2019
Achievement
Data Eruption

Introduction to Data Visualization with Matplotlib

Achieved
Feb 23, 2019
Achievement
Chart Toppers

Introduction to Data Visualization with Matplotlib

Achieved
Feb 23, 2019
Achievement
Getting Started with Data Visualization

Introduction to Data Visualization with Matplotlib

Achieved
Feb 23, 2019
Achievement
Practice Functions

Practice Creating and Using Functions in Python

Achieved
Feb 23, 2019
Achievement
Buggy Logs

Write Better Python

Achieved
Feb 22, 2019
Achievement
Cleaner Code

Write Better Python

Achieved
Feb 21, 2019
Achievement
Dice Roller

Object-Oriented Python

Achieved
Feb 21, 2019
Achievement
Python: Advanced Objects

Object-Oriented Python

Achieved
Feb 19, 2019
Achievement
Build an Application

Introducing Lists

Achieved
Feb 17, 2019
Achievement
Using Lists

Introducing Lists

Achieved
Feb 17, 2019
Achievement
Meet Lists

Introducing Lists

Achieved
Feb 17, 2019
Achievement
All Together Now

Python Basics

Achieved
Feb 17, 2019
Achievement
Functions and Looping

Python Basics

Achieved
Feb 17, 2019
Achievement
Types and Branching

Python Basics

Achieved
Feb 17, 2019
Achievement
Meet Python

Python Basics

Achieved
Feb 16, 2019
Achievement
The Internet

How the Internet Works

Achieved
Oct 20, 2018
Achievement
Python: Inheritance

Object-Oriented Python

Achieved
Apr 2, 2018
Achievement
Python: Instant Objects

Object-Oriented Python

Achieved
Apr 2, 2018
Achievement
Dungeon Game 2

Python Collections (2016, retired 2019)

Achieved
Apr 1, 2018
Achievement
Python Sets

Python Collections (2016, retired 2019)

Achieved
Mar 31, 2018
Achievement
Python Tuples

Python Collections (2016, retired 2019)

Achieved
Mar 31, 2018
Achievement
Python Dictionaries

Python Collections (2016, retired 2019)

Achieved
Mar 31, 2018
Achievement
Python Slices

Python Collections (2016, retired 2019)

Achieved
Mar 30, 2018
Achievement
Python Lists

Python Collections (2016, retired 2019)

Achieved
Mar 30, 2018
Achievement
Letter Game App

Python Basics (2015)

Achieved
Mar 30, 2018
Achievement
Number Game App

Python Basics (2015)

Achieved
Mar 30, 2018
Achievement
Shopping List App

Python Basics (2015)

Achieved
Mar 30, 2018
Achievement
Logic in Python

Python Basics (2015)

Achieved
Jan 31, 2018
Achievement
Python Data Types

Python Basics (2015)

Achieved
Jan 13, 2018
Achievement
Python For Beginners

Python Basics (2015)

Achieved
Jan 12, 2018
Achievement
Score, Enemies, and Game State

How to Make a Video Game

Achieved
Dec 1, 2016
Achievement
Pickups

How to Make a Video Game

Achieved
Nov 28, 2016
Achievement
Player Input and Cameras

How to Make a Video Game

Achieved
Nov 26, 2016
Achievement
The Unity Editor and Scene Setup

How to Make a Video Game

Achieved
Nov 26, 2016
Achievement
Introduction to Video Games

How to Make a Video Game

Achieved
Nov 26, 2016
Achievement
Selectors - Beyond the Basics

CSS Selectors

Achieved
Feb 16, 2016
Achievement
Values and Units

CSS Foundations

Achieved
May 23, 2015
Achievement
Advanced Selectors

CSS Foundations

Achieved
May 22, 2015
Achievement
Selectors

CSS Foundations

Achieved
May 18, 2015
Achievement
Fundamental Concepts

CSS Basics (2014)

Achieved
May 18, 2015
Achievement
Designing with the Latest Features

CSS Basics (2014)

Achieved
May 18, 2015
Achievement
Basic Layout

CSS Basics (2014)

Achieved
May 18, 2015
Achievement
The Box Model

CSS Basics (2014)

Achieved
May 18, 2015
Achievement
Understanding Values and Units

CSS Basics (2014)

Achieved
May 17, 2015
Achievement
Basic Selectors

CSS Basics (2014)

Achieved
May 17, 2015
Achievement
Getting Started with CSS

CSS Basics (2014)

Achieved
May 17, 2015
Achievement
Getting Started with CSS

CSS Foundations

Achieved
May 17, 2015
Achievement
Forms

HTML

Achieved
May 17, 2015
Achievement
Tables

HTML

Achieved
May 16, 2015
Achievement
Objects

HTML

Achieved
May 16, 2015
Achievement
Links

HTML

Achieved
May 16, 2015
Achievement
Lists

HTML

Achieved
May 16, 2015
Achievement
Text

HTML

Achieved
Jan 13, 2015
Achievement
Introduction

HTML

Achieved
Jul 20, 2014
Achievement
Debugging HTML and CSS Problems

How to Make a Website

Achieved
Jul 9, 2014
Achievement
Sharing a Website

How to Make a Website

Achieved
Jul 9, 2014
Achievement
Responsive Web Design and Testing

How to Make a Website

Achieved
Jul 9, 2014
Achievement
Adding Pages to a Website

How to Make a Website

Achieved
Jul 6, 2014
Achievement
Styling Web Pages and Navigation

How to Make a Website

Achieved
Jul 6, 2014
Achievement
Customizing Colors and Fonts

How to Make a Website

Achieved
Jul 5, 2014
Achievement
CSS: Cascading Style Sheets

How to Make a Website

Achieved
Jul 5, 2014
Achievement
Creating HTML Content

How to Make a Website

Achieved
Jul 4, 2014
Achievement
HTML First

How to Make a Website

Achieved
Jul 4, 2014
Achievement
Beginning HTML and CSS

How to Make a Website

Achieved
Jul 4, 2014
Achievement
Newbie

Achieved
Jun 25, 2014