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David Diehr

Member Since January 12, 2015

Open to Work

16,457

Total Points

•
3,842

JavaScript

3826 pts
Achievements

16 pts
Forum
•
3,186

Ruby

3186 pts
Achievements

0 pts
Forum
•
2,520

Python

2504 pts
Achievements

16 pts
Forum
•
1,889

HTML

1889 pts
Achievements

0 pts
Forum
•
1,597

Development Tools

1597 pts
Achievements

0 pts
Forum
•
1,568

CSS

1567 pts
Achievements

1 pts
Forum
•
900

Design

900 pts
Achievements

0 pts
Forum
•
402

C#

402 pts
Achievements

0 pts
Forum
•
30

Databases

30 pts
Achievements

0 pts
Forum

Points are earned whenever you take an important action on Treehouse.
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Skills & Experience

Company

Fleet Logistics
Job Title

Technical Product Manager

189 Achievements

Achievement
Gems In Depth

Ruby Gems

Achieved
May 16, 2018
Achievement
Ruby Gems

Ruby Gems

Achieved
May 16, 2018
Achievement
Ruby Standard Library: Part 2

Ruby Core and Standard Library

Achieved
May 15, 2018
Achievement
Ruby Standard Library: Part 1

Ruby Core and Standard Library

Achieved
May 15, 2018
Achievement
Ruby Core

Ruby Core and Standard Library

Achieved
May 14, 2018
Achievement
Store Inventory Using Modules

Ruby Modules

Achieved
May 7, 2018
Achievement
Include and Extend

Ruby Modules

Achieved
May 6, 2018
Achievement
Ruby Core Modules

Ruby Modules

Achieved
May 2, 2018
Achievement
Ruby Module Basics

Ruby Modules

Achieved
Apr 14, 2018
Achievement
Input and Output

Build an Address Book in Ruby

Achieved
Apr 14, 2018
Achievement
Search

Build an Address Book in Ruby

Achieved
Apr 14, 2018
Achievement
Ruby Class Design

Build an Address Book in Ruby

Achieved
Apr 14, 2018
Achievement
Blocks Practice

Ruby Blocks

Achieved
Apr 10, 2018
Achievement
Working With Blocks

Ruby Blocks

Achieved
Apr 2, 2018
Achievement
Ruby Blocks

Ruby Blocks

Achieved
Mar 30, 2018
Achievement
Build a Bank Account Class

Ruby Objects and Classes

Achieved
Mar 30, 2018
Achievement
Ruby Variables and Methods

Ruby Objects and Classes

Achieved
Mar 29, 2018
Achievement
Ruby Objects and Classes

Ruby Objects and Classes

Achieved
Mar 29, 2018
Achievement
Build a Simple Contact List

Ruby Loops

Achieved
Mar 29, 2018
Achievement
Ruby Iteration

Ruby Loops

Achieved
Mar 27, 2018
Achievement
Ruby Loops

Ruby Loops

Achieved
Mar 25, 2018
Achievement
Build a Grocery List Program

Ruby Collections

Achieved
Mar 25, 2018
Achievement
Ruby Hashes

Ruby Collections

Achieved
Mar 25, 2018
Achievement
Ruby Arrays

Ruby Collections

Achieved
Mar 25, 2018
Achievement
Ruby Conditionals

Ruby Basics

Achieved
Mar 25, 2018
Achievement
Ruby Numeric Types

Ruby Basics

Achieved
Mar 25, 2018
Achievement
Ruby Objects

Ruby Basics

Achieved
Mar 25, 2018
Achievement
Ruby Strings and Escape Sequences

Ruby Basics

Achieved
Mar 25, 2018
Achievement
Ruby Syntax

Ruby Basics

Achieved
Mar 24, 2018
Achievement
Creating a Simple Server in Node.js

Build a Simple Dynamic Site with Node.js

Achieved
Feb 4, 2016
Achievement
Building a Command Line Application

Node.js Basics (2014)

Achieved
Feb 3, 2016
Achievement
Introduction to Node.js

Node.js Basics (2014)

Achieved
Feb 3, 2016
Achievement
Quiz Practice Project

Object-Oriented JavaScript (2015)

Achieved
Feb 2, 2016
Achievement
Prototypal Inheritance

Object-Oriented JavaScript (2015)

Achieved
Feb 2, 2016
Achievement
Constructor Functions & Prototypes

Object-Oriented JavaScript (2015)

Achieved
Feb 2, 2016
Achievement
Perfect

C# Basics (Retired)

Achieved
Feb 1, 2016
Achievement
Perform

C# Basics (Retired)

Achieved
Jan 31, 2016
Achievement
Console I/O

C# Basics (Retired)

Achieved
Jan 23, 2016
Achievement
Prepare and Plan

C# Basics (Retired)

Achieved
Jan 13, 2016
Achievement
Introduction to Methods

Object-Oriented JavaScript (2015)

Achieved
Nov 9, 2015
Achievement
Using a jQuery Carousel

Using jQuery Plugins

Achieved
Nov 7, 2015
Achievement
Add a Sticky Navigation Bar

Using jQuery Plugins

Achieved
Nov 7, 2015
Achievement
Introducing jQuery Plugins

Using jQuery Plugins

Achieved
Oct 10, 2015
Achievement
Joining Relational Data Between Tables in SQL

Database Foundations

Achieved
Aug 2, 2015
Achievement
Manipulating Schema with SQL

Database Foundations

Achieved
Jul 17, 2015
Achievement
Creating Tables and Manipulating Data with SQL

Database Foundations

Achieved
Jul 15, 2015
Achievement
Reading Data from Databases with SQL

Database Foundations

Achieved
Jul 13, 2015
Achievement
Getting Started with Data Science

Data Science Basics

Achieved
Jul 9, 2015
Achievement
Installing MySQL Server and MySQL Workbench

Database Foundations

Achieved
Jul 7, 2015
Achievement
Covering Your Bases

Python Testing

Achieved
Jul 6, 2015
Achievement
Be Assertive!

Python Testing

Achieved
Jul 6, 2015
Achievement
What Is Testing?

Python Testing

Achieved
Jul 6, 2015
Achievement
Gettin' CRUD-y With It

Using Databases in Python

Achieved
Jul 6, 2015
Achievement
Our Diary App

Using Databases in Python

Achieved
Jul 6, 2015
Achievement
Meet Peewee

Using Databases in Python

Achieved
Jul 6, 2015
Achievement
Introduction to Data, Databases and SQL

Database Foundations

Achieved
Jul 5, 2015
Achievement
Python Regular Expressions

Regular Expressions in Python

Achieved
Jul 5, 2015
Achievement
Timezones

Dates and Times in Python (2014)

Achieved
Jul 4, 2015
Achievement
Math Quiz App

Dates and Times in Python (2014)

Achieved
Jul 4, 2015
Achievement
Dates and Times

Dates and Times in Python (2014)

Achieved
Jul 4, 2015
Achievement
Buggy Logs

Write Better Python

Achieved
Jul 3, 2015
Achievement
Cleaner Code

Write Better Python

Achieved
Jul 3, 2015
Achievement
Local Python

Setting Up a Local Python Environment

Achieved
Jul 3, 2015
Achievement
Hack-n-Slash

Object-Oriented Python (retired)

Achieved
Jul 3, 2015
Achievement
Python Inheritance

Object-Oriented Python (retired)

Achieved
Jul 2, 2015
Achievement
Python Objects

Object-Oriented Python (retired)

Achieved
Jun 29, 2015
Achievement
Dungeon Game

Python Collections (Retired)

Achieved
Jun 29, 2015
Achievement
Tuples

Python Collections (Retired)

Achieved
Jun 28, 2015
Achievement
Dictionaries

Python Collections (Retired)

Achieved
Jun 28, 2015
Achievement
Slices

Python Collections (Retired)

Achieved
Jun 28, 2015
Achievement
Lists Redux

Python Collections (Retired)

Achieved
Jun 27, 2015
Achievement
Pick a Number! Any Number!

Python Basics (Retired)

Achieved
Jun 26, 2015
Achievement
Putting the "Fun" Back in "Functions"

Python Basics (Retired)

Achieved
Jun 26, 2015
Achievement
Shopping List

Python Basics (Retired)

Achieved
Jun 24, 2015
Achievement
Things That Count

Python Basics (Retired)

Achieved
Jun 24, 2015
Achievement
Ins & Outs

Python Basics (Retired)

Achieved
Jun 23, 2015
Achievement
Say Hello to Python

Python Basics (Retired)

Achieved
Jun 23, 2015
Achievement
Ruby Methods

Ruby Basics (Retired)

Achieved
Jun 3, 2015
Achievement
Ruby Numbers (Ruby Basics)

Ruby Basics (Retired)

Achieved
Jun 3, 2015
Achievement
Ruby Strings (Ruby Basics)

Ruby Basics (Retired)

Achieved
Jun 3, 2015
Achievement
How Ruby Works

Ruby Basics (Retired)

Achieved
Jun 3, 2015
Achievement
Creating an Icon

Illustrator Foundations

Achieved
Jun 3, 2015
Achievement
Introduction to Illustrator

Illustrator Foundations

Achieved
May 30, 2015
Achievement
Workflow Basics

Photoshop Foundations

Achieved
May 27, 2015
Achievement
Slices & Save for Web

Photoshop Foundations

Achieved
May 27, 2015
Achievement
Vector Shapes

Photoshop Foundations

Achieved
May 18, 2015
Achievement
Type Tools

Photoshop Foundations

Achieved
May 16, 2015
Achievement
Masks Basics

Photoshop Foundations

Achieved
May 13, 2015
Achievement
Layer Basics

Photoshop Foundations

Achieved
May 10, 2015
Achievement
Workspace Basics

Photoshop Foundations

Achieved
Apr 28, 2015
Achievement
Design Foundations Final

Design Foundations

Achieved
Apr 28, 2015
Achievement
Becoming a Problem Solver

Design Foundations

Achieved
Apr 28, 2015
Achievement
Understanding Aesthetics

Design Foundations

Achieved
Apr 26, 2015
Achievement
Introduction to Design

Design Foundations

Achieved
Apr 25, 2015
Achievement
Grid Layout

CSS Layout Techniques

Achieved
Apr 24, 2015
Achievement
Flexbox Layout

CSS Layout Techniques

Achieved
Apr 23, 2015
Achievement
Positioning Schemes

CSS Layout Techniques

Achieved
Apr 23, 2015
Achievement
Float Layout

CSS Layout Techniques

Achieved
Apr 23, 2015
Achievement
Display Modes

CSS Layout Techniques

Achieved
Apr 21, 2015
Achievement
Advanced Selectors

CSS Selectors

Achieved
Apr 21, 2015
Achievement
Going Further with Attribute Selectors and Pseudo-Classes

CSS Selectors

Achieved
Apr 18, 2015
Achievement
Selectors - Beyond the Basics

CSS Selectors

Achieved
Apr 16, 2015
Achievement
Combine and Minify Assets

Introduction to Front End Performance Optimization

Achieved
Apr 15, 2015
Achievement
Optimize Assets

Introduction to Front End Performance Optimization

Achieved
Apr 15, 2015
Achievement
Measuring Performance

Introduction to Front End Performance Optimization

Achieved
Apr 15, 2015
Achievement
Planning for Performance

Introduction to Front End Performance Optimization

Achieved
Apr 15, 2015
Achievement
Workflows

Git Basics

Achieved
Apr 15, 2015
Achievement
Working With Remote Repositories

Git Basics

Achieved
Apr 15, 2015
Achievement
Merging

Git Basics

Achieved
Apr 14, 2015
Achievement
Branches

Git Basics

Achieved
Apr 14, 2015
Achievement
Getting Started With Git

Git Basics

Achieved
Apr 13, 2015
Achievement
Why Version Control Matters

Git Basics

Achieved
Apr 12, 2015
Achievement
Installing Programs

Console Foundations

Achieved
Apr 12, 2015
Achievement
Environment and Redirection

Console Foundations

Achieved
Apr 12, 2015
Achievement
Console Processes

Console Foundations

Achieved
Apr 11, 2015
Achievement
Console Users and Permission

Console Foundations

Achieved
Apr 11, 2015
Achievement
Moving Around in the Console

Console Foundations

Achieved
Apr 11, 2015
Achievement
Chrome DevTools Basics

Website Optimization

Achieved
Apr 10, 2015
Achievement
Web Apps

Accessibility

Achieved
Apr 5, 2015
Achievement
Websites

Accessibility

Achieved
Apr 5, 2015
Achievement
Introduction

Accessibility

Achieved
Apr 5, 2015
Achievement
Responsive Patterns

Responsive Layouts

Achieved
Apr 5, 2015
Achievement
Media Queries

Responsive Layouts

Achieved
Apr 5, 2015
Achievement
Responsive Theory

Responsive Layouts

Achieved
Apr 5, 2015
Achievement
AJAX and APIs

AJAX Basics (retiring)

Achieved
Apr 5, 2015
Achievement
jQuery and AJAX

AJAX Basics (retiring)

Achieved
Apr 5, 2015
Achievement
Programming AJAX

AJAX Basics (retiring)

Achieved
Mar 30, 2015
Achievement
AJAX Concepts

AJAX Basics (retiring)

Achieved
Mar 22, 2015
Achievement
JavaScript Objects

JavaScript Foundations

Achieved
Mar 16, 2015
Achievement
JavaScript Functions

JavaScript Foundations

Achieved
Mar 16, 2015
Achievement
JavaScript Numbers

JavaScript Foundations

Achieved
Mar 16, 2015
Achievement
JavaScript Arrays

JavaScript Foundations

Achieved
Mar 16, 2015
Achievement
JavaScript Strings

JavaScript Foundations

Achieved
Mar 16, 2015
Achievement
Introduction Variables

JavaScript Foundations

Achieved
Mar 16, 2015
Achievement
Functions

Introduction to Programming

Achieved
Mar 16, 2015
Achievement
Objects and Arrays

Introduction to Programming

Achieved
Mar 15, 2015
Achievement
Control Structures

Introduction to Programming

Achieved
Mar 15, 2015
Achievement
Basics

Introduction to Programming

Achieved
Mar 15, 2015
Achievement
Custom Media Players

HTML Video and Audio (Retired)

Achieved
Mar 15, 2015
Achievement
Captioning Video

HTML Video and Audio (Retired)

Achieved
Mar 15, 2015
Achievement
Media Basics

HTML Video and Audio (Retired)

Achieved
Mar 15, 2015
Achievement
Traversing and Manipulating the DOM with JavaScript

Interactive Web Pages with JavaScript

Achieved
Mar 15, 2015
Achievement
Selecting Elements and Adding Events with JavaScript

Interactive Web Pages with JavaScript

Achieved
Mar 14, 2015
Achievement
JavaScript and the DOM

Interactive Web Pages with JavaScript

Achieved
Mar 14, 2015
Achievement
Structuring Tables

HTML Tables

Achieved
Mar 13, 2015
Achievement
Table Basics

HTML Tables

Achieved
Mar 13, 2015
Achievement
Creating a Simple Drawing Application

jQuery Basics (2014)

Achieved
Mar 12, 2015
Achievement
Creating a Password Confirmation Form

jQuery Basics (2014)

Achieved
Mar 8, 2015
Achievement
Creating a Mobile Drop Down Menu

jQuery Basics (2014)

Achieved
Mar 7, 2015
Achievement
Welcome to the Treehouse Club

Treehouse Club: HTML

Achieved
Mar 6, 2015
Achievement
Creating a Simple Lightbox

jQuery Basics (2014)

Achieved
Mar 6, 2015
Achievement
Creating a Spoiler Revealer

jQuery Basics (2014)

Achieved
Mar 4, 2015
Achievement
Introduction to jQuery

jQuery Basics (2014)

Achieved
Mar 4, 2015
Achievement
JavaScript Objects

JavaScript Loops, Arrays and Objects

Achieved
Feb 26, 2015
Achievement
JavaScript Arrays

JavaScript Loops, Arrays and Objects

Achieved
Feb 23, 2015
Achievement
JavaScript Loops

JavaScript Loops, Arrays and Objects

Achieved
Feb 22, 2015
Achievement
Choosing Options

HTML Forms

Achieved
Feb 21, 2015
Achievement
Organizing Forms

HTML Forms

Achieved
Feb 21, 2015
Achievement
Form Basics

HTML Forms

Achieved
Feb 21, 2015
Achievement
Forms

HTML

Achieved
Feb 21, 2015
Achievement
Tables

HTML

Achieved
Feb 21, 2015
Achievement
Objects

HTML

Achieved
Feb 21, 2015
Achievement
Links

HTML

Achieved
Feb 21, 2015
Achievement
Lists

HTML

Achieved
Feb 19, 2015
Achievement
Text

HTML

Achieved
Feb 19, 2015
Achievement
Introduction

HTML

Achieved
Feb 19, 2015
Achievement
JavaScript Functions

JavaScript Basics (Retired)

Achieved
Feb 17, 2015
Achievement
JavaScript Conditional Statements

JavaScript Basics (Retired)

Achieved
Feb 16, 2015
Achievement
JavaScript Numbers

JavaScript Basics (Retired)

Achieved
Feb 15, 2015
Achievement
JavaScript Variables

JavaScript Basics (Retired)

Achieved
Feb 14, 2015
Achievement
Introducing JavaScript

JavaScript Basics (Retired)

Achieved
Feb 13, 2015
Achievement
Fundamental Concepts

CSS Basics (2014)

Achieved
Feb 11, 2015
Achievement
Designing with the Latest Features

CSS Basics (2014)

Achieved
Feb 11, 2015
Achievement
Basic Layout

CSS Basics (2014)

Achieved
Feb 10, 2015
Achievement
The Box Model

CSS Basics (2014)

Achieved
Feb 9, 2015
Achievement
Understanding Values and Units

CSS Basics (2014)

Achieved
Feb 8, 2015
Achievement
Basic Selectors

CSS Basics (2014)

Achieved
Feb 7, 2015
Achievement
Getting Started with CSS

CSS Basics (2014)

Achieved
Feb 6, 2015
Achievement
Debugging HTML and CSS Problems

How to Make a Website

Achieved
Feb 5, 2015
Achievement
Sharing a Website

How to Make a Website

Achieved
Feb 4, 2015
Achievement
Responsive Web Design and Testing

How to Make a Website

Achieved
Feb 1, 2015
Achievement
Adding Pages to a Website

How to Make a Website

Achieved
Feb 1, 2015
Achievement
Styling Web Pages and Navigation

How to Make a Website

Achieved
Jan 30, 2015
Achievement
Customizing Colors and Fonts

How to Make a Website

Achieved
Jan 30, 2015
Achievement
CSS: Cascading Style Sheets

How to Make a Website

Achieved
Jan 29, 2015
Achievement
Creating HTML Content

How to Make a Website

Achieved
Jan 28, 2015
Achievement
HTML First

How to Make a Website

Achieved
Jan 27, 2015
Achievement
Beginning HTML and CSS

How to Make a Website

Achieved
Jan 27, 2015
Achievement
Newbie

Achieved
Jan 12, 2015