Jeff Lange

Jeff Lange

Los Angeles, California

8,788

Total Points

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

Skills & Experience

  • Job Title

    Rails Developer

105 Achievements

  • Achievement

    Stateful Components and Lifecycle Methods

    React Components

    Achieved

    Dec 1, 2018

    Stateful Components and Lifecycle Methods
  • Achievement

    Managing State and Data Flow

    React Components

    Achieved

    Nov 29, 2018

    Managing State and Data Flow
  • Achievement

    Build Modular Interfaces with Components

    React Components

    Achieved

    Nov 20, 2018

    Build Modular Interfaces with Components
  • Achievement

    Practicing Object Basics

    Practice Object Basics in JavaScript

    Achieved

    Oct 29, 2018

    Practicing Object Basics
  • Achievement

    Stateful Components

    React Basics

    Achieved

    Oct 26, 2018

    Stateful Components
  • Achievement

    Practicing Classes

    Practice Classes in JavaScript

    Achieved

    Oct 24, 2018

    Practicing Classes
  • Achievement

    Practicing Getters and Setters

    Practice Getters and Setters in JavaScript

    Achieved

    Oct 24, 2018

    Practicing Getters and Setters
  • Achievement

    Introducing Props

    React Basics

    Achieved

    Oct 22, 2018

    Introducing Props
  • Achievement

    Thinking in Components

    React Basics

    Achieved

    Oct 17, 2018

    Thinking in Components
  • Achievement

    First Steps in React

    React Basics

    Achieved

    Oct 16, 2018

    First Steps in React
  • Achievement

    Logic in Python

    Python Basics (2015)

    Achieved

    Dec 30, 2017

    Logic in Python
  • Achievement

    Python Data Types

    Python Basics (2015)

    Achieved

    Dec 30, 2017

    Python Data Types
  • Achievement

    Python For Beginners

    Python Basics (2015)

    Achieved

    Dec 30, 2017

    Python For Beginners
  • Achievement

    Programming AJAX

    AJAX Basics (retiring)

    Achieved

    Dec 5, 2015

    Programming AJAX
  • Achievement

    JavaScript Loops

    JavaScript Loops, Arrays and Objects

    Achieved

    Dec 4, 2015

    JavaScript Loops
  • Achievement

    AJAX Concepts

    AJAX Basics (retiring)

    Achieved

    Dec 2, 2015

    AJAX Concepts
  • Achievement

    JavaScript Functions

    JavaScript Basics (Retired)

    Achieved

    Dec 2, 2015

    JavaScript Functions
  • Achievement

    JavaScript Conditional Statements

    JavaScript Basics (Retired)

    Achieved

    Nov 24, 2015

    JavaScript Conditional Statements
  • Achievement

    Route Connections

    Build a Rails API

    Achieved

    Jul 7, 2015

    Route Connections
  • Achievement

    Introduction to REST

    Build a Rails API

    Achieved

    Jul 7, 2015

    Introduction to REST
  • Achievement

    JavaScript Numbers

    JavaScript Basics (Retired)

    Achieved

    Jun 19, 2015

    JavaScript Numbers
  • Achievement

    JavaScript Variables

    JavaScript Basics (Retired)

    Achieved

    Jun 17, 2015

    JavaScript Variables
  • Achievement

    Introducing JavaScript

    JavaScript Basics (Retired)

    Achieved

    Jun 13, 2015

    Introducing JavaScript
  • Achievement

    Fundamental Concepts

    CSS Basics (2014)

    Achieved

    Jun 13, 2015

    Fundamental Concepts
  • Achievement

    Designing with the Latest Features

    CSS Basics (2014)

    Achieved

    Jun 12, 2015

    Designing with the Latest Features
  • Achievement

    Basic Layout

    CSS Basics (2014)

    Achieved

    Jun 9, 2015

    Basic Layout
  • Achievement

    The Box Model

    CSS Basics (2014)

    Achieved

    Jun 5, 2015

    The Box Model
  • Achievement

    Understanding Values and Units

    CSS Basics (2014)

    Achieved

    Jun 5, 2015

    Understanding Values and Units
  • Achievement

    Basic Selectors

    CSS Basics (2014)

    Achieved

    Jun 5, 2015

    Basic Selectors
  • Achievement

    Getting Started with CSS

    CSS Basics (2014)

    Achieved

    May 29, 2015

    Getting Started with CSS
  • Achievement

    Password Resets and Testing

    User Authentication with Rails

    Achieved

    Nov 26, 2014

    Password Resets and Testing
  • Achievement

    Adding User Support to Our Application

    User Authentication with Rails

    Achieved

    Nov 25, 2014

    Adding User Support to Our Application
  • Achievement

    Password Hashing and Sign-In

    User Authentication with Rails

    Achieved

    Nov 24, 2014

    Password Hashing and Sign-In
  • Achievement

    AR Extensions

    ActiveRecord Basics

    Achieved

    Nov 19, 2014

    AR Extensions
  • Achievement

    Callbacks

    ActiveRecord Basics

    Achieved

    Nov 19, 2014

    Callbacks
  • Achievement

    Query Interface

    ActiveRecord Basics

    Achieved

    Nov 19, 2014

    Query Interface
  • Achievement

    Getting Started with CSS

    CSS Foundations

    Achieved

    Nov 18, 2014

    Getting Started with CSS
  • Achievement

    Choosing Options

    HTML Forms

    Achieved

    Nov 18, 2014

    Choosing Options
  • Achievement

    Organizing Forms

    HTML Forms

    Achieved

    Nov 17, 2014

    Organizing Forms
  • Achievement

    Validation

    ActiveRecord Basics

    Achieved

    Nov 17, 2014

    Validation
  • Achievement

    Form Basics

    HTML Forms

    Achieved

    Nov 12, 2014

    Form Basics
  • Achievement

    Using your New Tools

    Java Basics

    Achieved

    Nov 12, 2014

    Using your New Tools
  • Achievement

    Getting Started with Java

    Java Basics

    Achieved

    Nov 12, 2014

    Getting Started with Java
  • Achievement

    Migrations and Relationships

    ActiveRecord Basics

    Achieved

    Nov 6, 2014

    Migrations and Relationships
  • Achievement

    Introduction to ActiveRecord

    ActiveRecord Basics

    Achieved

    Nov 3, 2014

    Introduction to ActiveRecord
  • Achievement

    Securing and Maintaining a MySQL Database

    Database Foundations

    Achieved

    Nov 3, 2014

    Securing and Maintaining a MySQL Database
  • Achievement

    SQL Calculating, Aggregating and Other Functions

    Database Foundations

    Achieved

    Nov 3, 2014

    SQL Calculating, Aggregating and Other Functions
  • Achievement

    Joining Relational Data Between Tables in SQL

    Database Foundations

    Achieved

    Nov 3, 2014

    Joining Relational Data Between Tables in SQL
  • Achievement

    Manipulating Schema with SQL

    Database Foundations

    Achieved

    Nov 3, 2014

    Manipulating Schema with SQL
  • Achievement

    Creating Tables and Manipulating Data with SQL

    Database Foundations

    Achieved

    Oct 31, 2014

    Creating Tables and Manipulating Data with SQL
  • Achievement

    Reading Data from Databases with SQL

    Database Foundations

    Achieved

    Oct 29, 2014

    Reading Data from Databases with SQL
  • Achievement

    Installing MySQL Server and MySQL Workbench

    Database Foundations

    Achieved

    Oct 29, 2014

    Installing MySQL Server and MySQL Workbench
  • Achievement

    Introduction to Data, Databases and SQL

    Database Foundations

    Achieved

    Oct 28, 2014

    Introduction to Data, Databases and SQL
  • Achievement

    Build a Todo List Application with Rails 4

    Build a Todo List Application with Rails 4

    Achieved

    Oct 28, 2014

    Build a Todo List Application with Rails 4
  • Achievement

    Ruby Testing

    Ruby Foundations

    Achieved

    Oct 15, 2014

    Ruby Testing
  • Achievement

    Standard Library

    Ruby Foundations

    Achieved

    Oct 8, 2014

    Standard Library
  • Achievement

    Ruby Core

    Ruby Foundations

    Achieved

    Sep 24, 2014

    Ruby Core
  • Achievement

    Ruby Modules

    Ruby Foundations

    Achieved

    Sep 22, 2014

    Ruby Modules
  • Achievement

    Ruby Procs & Lambdas

    Ruby Foundations

    Achieved

    Sep 17, 2014

    Ruby Procs & Lambdas
  • Achievement

    Ruby Blocks

    Ruby Foundations

    Achieved

    Sep 10, 2014

    Ruby Blocks
  • Achievement

    Ruby Loops

    Ruby Foundations

    Achieved

    Sep 9, 2014

    Ruby Loops
  • Achievement

    Ruby Methods

    Ruby Foundations

    Achieved

    Sep 9, 2014

    Ruby Methods
  • Achievement

    Ruby Hashes

    Ruby Foundations

    Achieved

    Aug 25, 2014

    Ruby Hashes
  • Achievement

    Ruby Arrays

    Ruby Foundations

    Achieved

    Aug 1, 2014

    Ruby Arrays
  • Achievement

    Ruby Methods

    Ruby Basics (Retired)

    Achieved

    Aug 1, 2014

    Ruby Methods
  • Achievement

    Ruby Numbers (Ruby Basics)

    Ruby Basics (Retired)

    Achieved

    Aug 1, 2014

    Ruby Numbers (Ruby Basics)
  • Achievement

    Ruby Strings (Ruby Basics)

    Ruby Basics (Retired)

    Achieved

    Aug 1, 2014

    Ruby Strings (Ruby Basics)
  • Achievement

    How Ruby Works

    Ruby Basics (Retired)

    Achieved

    Aug 1, 2014

    How Ruby Works
  • Achievement

    Ruby Numbers

    Ruby Foundations

    Achieved

    Jul 31, 2014

    Ruby Numbers
  • Achievement

    Ruby Strings

    Ruby Foundations

    Achieved

    Jul 31, 2014

    Ruby Strings
  • Achievement

    Objects, Classes, and Variables

    Ruby Foundations

    Achieved

    Jul 29, 2014

    Objects, Classes, and Variables
  • Achievement

    Ruby Basics

    Ruby Foundations

    Achieved

    Jul 29, 2014

    Ruby Basics
  • Achievement

    Installing a Ruby Development Environment

    Installing a Ruby Development Environment

    Achieved

    Jul 24, 2014

    Installing a Ruby Development Environment
  • Achievement

    Workflows

    Git Basics

    Achieved

    Jul 24, 2014

    Workflows
  • Achievement

    Working With Remote Repositories

    Git Basics

    Achieved

    Jul 24, 2014

    Working With Remote Repositories
  • Achievement

    Merging

    Git Basics

    Achieved

    Jul 23, 2014

    Merging
  • Achievement

    Branches

    Git Basics

    Achieved

    Jul 23, 2014

    Branches
  • Achievement

    Getting Started With Git

    Git Basics

    Achieved

    Jul 23, 2014

    Getting Started With Git
  • Achievement

    Why Version Control Matters

    Git Basics

    Achieved

    Jul 22, 2014

    Why Version Control Matters
  • Achievement

    Installing Programs

    Console Foundations

    Achieved

    Jul 22, 2014

    Installing Programs
  • Achievement

    Environment and Redirection

    Console Foundations

    Achieved

    Jul 22, 2014

    Environment and Redirection
  • Achievement

    Console Processes

    Console Foundations

    Achieved

    Jul 22, 2014

    Console Processes
  • Achievement

    Console Users and Permission

    Console Foundations

    Achieved

    Jul 22, 2014

    Console Users and Permission
  • Achievement

    Moving Around in the Console

    Console Foundations

    Achieved

    Jul 22, 2014

    Moving Around in the Console
  • Achievement

    JavaScript Objects

    JavaScript Foundations

    Achieved

    Jul 21, 2014

    JavaScript Objects
  • Achievement

    JavaScript Functions

    JavaScript Foundations

    Achieved

    Jul 18, 2014

    JavaScript Functions
  • Achievement

    JavaScript Arrays

    JavaScript Foundations

    Achieved

    Jul 17, 2014

    JavaScript Arrays
  • Achievement

    JavaScript Numbers

    JavaScript Foundations

    Achieved

    Jul 17, 2014

    JavaScript Numbers
  • Achievement

    JavaScript Strings

    JavaScript Foundations

    Achieved

    Jul 16, 2014

    JavaScript Strings
  • Achievement

    Introduction Variables

    JavaScript Foundations

    Achieved

    Jul 16, 2014

    Introduction Variables
  • Achievement

    Functions

    Introduction to Programming

    Achieved

    Jul 15, 2014

    Functions
  • Achievement

    Objects and Arrays

    Introduction to Programming

    Achieved

    Jul 14, 2014

    Objects and Arrays
  • Achievement

    Control Structures

    Introduction to Programming

    Achieved

    Jul 14, 2014

    Control Structures
  • Achievement

    Basics

    Introduction to Programming

    Achieved

    Jul 12, 2014

    Basics
  • Achievement

    Debugging HTML and CSS Problems

    How to Make a Website

    Achieved

    Jul 12, 2014

    Debugging HTML and CSS Problems
  • Achievement

    Sharing a Website

    How to Make a Website

    Achieved

    Jul 11, 2014

    Sharing a Website
  • Achievement

    Responsive Web Design and Testing

    How to Make a Website

    Achieved

    Jul 11, 2014

    Responsive Web Design and Testing
  • Achievement

    Adding Pages to a Website

    How to Make a Website

    Achieved

    Jul 10, 2014

    Adding Pages to a Website
  • Achievement

    Styling Web Pages and Navigation

    How to Make a Website

    Achieved

    Jul 8, 2014

    Styling Web Pages and Navigation
  • Achievement

    Customizing Colors and Fonts

    How to Make a Website

    Achieved

    Jun 14, 2014

    Customizing Colors and Fonts
  • Achievement

    CSS: Cascading Style Sheets

    How to Make a Website

    Achieved

    Jun 6, 2014

    CSS: Cascading Style Sheets
  • Achievement

    Creating HTML Content

    How to Make a Website

    Achieved

    Jun 4, 2014

    Creating HTML Content
  • Achievement

    HTML First

    How to Make a Website

    Achieved

    Jun 1, 2014

    HTML First
  • Achievement

    Beginning HTML and CSS

    How to Make a Website

    Achieved

    May 30, 2014

    Beginning HTML and CSS
  • Achievement

    Newbie

    Achieved

    May 30, 2014

    Newbie