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Alexander Costa

Portland, OR

Open to Work

I fell in love with programming for the "Aha!" moments

11,464

Total Points

•
3,272

JavaScript

3260 pts
Achievements

12 pts
Forum
•
2,008

PHP

1975 pts
Achievements

33 pts
Forum
•
1,917

CSS

1896 pts
Achievements

21 pts
Forum
•
1,742

HTML

1729 pts
Achievements

13 pts
Forum
•
1,032

C#

1032 pts
Achievements

0 pts
Forum
•
934

Development Tools

934 pts
Achievements

0 pts
Forum
•
78

Ruby

78 pts
Achievements

0 pts
Forum
•
29

Design

29 pts
Achievements

0 pts
Forum
•
1

Java

1 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.

Skills & Experience

134 Achievements

Achievement
PHP Conditionals

PHP Arrays and Control Structures

Achieved
Jun 28, 2018
Achievement
PHP on the Web

PHP Basics

Achieved
Jun 28, 2018
Achievement
Daily Exercise Program

PHP Basics

Achieved
Jun 28, 2018
Achievement
Unit Converter

PHP Basics

Achieved
Jun 12, 2018
Achievement
Getting to Know PHP

PHP Basics

Achieved
Jun 12, 2018
Achievement
Loops and Final Touches

C# Objects

Achieved
Mar 5, 2018
Achievement
Encapsulation with Properties

C# Objects

Achieved
Mar 4, 2018
Achievement
Encapsulation and Arrays

C# Objects

Achieved
Mar 2, 2018
Achievement
Inheritance

C# Objects

Achieved
Mar 1, 2018
Achievement
Methods

C# Objects

Achieved
Feb 28, 2018
Achievement
Object-Oriented Programming

C# Objects

Achieved
Feb 27, 2018
Achievement
Perfect

C# Basics (Retired)

Achieved
Feb 25, 2018
Achievement
Perform

C# Basics (Retired)

Achieved
Feb 25, 2018
Achievement
Console I/O

C# Basics (Retired)

Achieved
Feb 24, 2018
Achievement
Prepare and Plan

C# Basics (Retired)

Achieved
Feb 24, 2018
Achievement
Fundamentals of C

Objective-C Basics (Retired)

Achieved
Dec 18, 2015
Achievement
Contact Forms & Mailers

Building Websites with PHP

Achieved
Oct 23, 2015
Achievement
Slim and Templates

Building Websites with PHP

Achieved
Oct 23, 2015
Achievement
PHP Inheritance & Interfaces

Object-Oriented PHP Basics (Retired)

Achieved
Oct 22, 2015
Achievement
Customizing Drupal

Drupal Basics

Achieved
Oct 21, 2015
Achievement
Modules and Themes

Drupal Basics

Achieved
Oct 15, 2015
Achievement
Site Building with the Drupal Interface

Drupal Basics

Achieved
Oct 15, 2015
Achievement
Learn About Drupal

Drupal Basics

Achieved
Oct 11, 2015
Achievement
PHP Internal Functions

PHP Functions

Achieved
Aug 31, 2015
Achievement
Dependency Management

Building Websites with PHP

Achieved
Aug 6, 2015
Achievement
PHP Properties & Methods

Object-Oriented PHP Basics (Retired)

Achieved
Aug 4, 2015
Achievement
PHP Objects and Classes

Object-Oriented PHP Basics (Retired)

Achieved
Jun 30, 2015
Achievement
AngularJS MVC Frameworks

AngularJS

Achieved
Apr 30, 2015
Achievement
How Ruby Works

Ruby Basics (Retired)

Achieved
Apr 9, 2015
Achievement
Introduction to Node.js

Node.js Basics (2014)

Achieved
Mar 2, 2015
Achievement
JavaScript Objects

JavaScript Loops, Arrays and Objects

Achieved
Feb 28, 2015
Achievement
JavaScript Arrays

JavaScript Loops, Arrays and Objects

Achieved
Feb 28, 2015
Achievement
JavaScript Loops

JavaScript Loops, Arrays and Objects

Achieved
Feb 27, 2015
Achievement
PHP Returns & Closures

PHP Functions

Achieved
Feb 22, 2015
Achievement
PHP Functions Basics

PHP Functions

Achieved
Feb 22, 2015
Achievement
PHP Loops

PHP Basics (Retired)

Achieved
Feb 22, 2015
Achievement
PHP Conditionals

PHP Basics (Retired)

Achieved
Feb 22, 2015
Achievement
PHP Datatypes

PHP Basics (Retired)

Achieved
Feb 22, 2015
Achievement
PHP Data & Structure

PHP Basics (Retired)

Achieved
Feb 20, 2015
Achievement
PHP Getting Started

PHP Basics (Retired)

Achieved
Feb 20, 2015
Achievement
Integrating With Paypal

Build a Simple PHP Application

Achieved
Feb 8, 2015
Achievement
Listing Inventory Items

Build a Simple PHP Application

Achieved
Feb 5, 2015
Achievement
Adding a Contact Form

Build a Simple PHP Application

Achieved
Feb 3, 2015
Achievement
Creating the Menu and Footer

Build a Simple PHP Application

Achieved
Feb 2, 2015
Achievement
Getting Started with PHP

Build a Simple PHP Application

Achieved
Feb 1, 2015
Achievement
Forms

HTML

Achieved
Jan 29, 2015
Achievement
JavaScript Functions

JavaScript Basics (Retired)

Achieved
Jan 17, 2015
Achievement
Tables

HTML

Achieved
Jan 17, 2015
Achievement
JavaScript Conditional Statements

JavaScript Basics (Retired)

Achieved
Jan 17, 2015
Achievement
Objects

HTML

Achieved
Jan 16, 2015
Achievement
Links

HTML

Achieved
Jan 16, 2015
Achievement
Lists

HTML

Achieved
Jan 16, 2015
Achievement
Text

HTML

Achieved
Jan 16, 2015
Achievement
JavaScript Numbers

JavaScript Basics (Retired)

Achieved
Jan 16, 2015
Achievement
Introduction

HTML

Achieved
Jan 16, 2015
Achievement
Workflows

Git Basics

Achieved
Jan 15, 2015
Achievement
Working With Remote Repositories

Git Basics

Achieved
Jan 15, 2015
Achievement
Merging

Git Basics

Achieved
Jan 15, 2015
Achievement
Branches

Git Basics

Achieved
Jan 15, 2015
Achievement
Getting Started With Git

Git Basics

Achieved
Jan 15, 2015
Achievement
Why Version Control Matters

Git Basics

Achieved
Jan 15, 2015
Achievement
Installing Programs

Console Foundations

Achieved
Jan 15, 2015
Achievement
Environment and Redirection

Console Foundations

Achieved
Jan 15, 2015
Achievement
Console Processes

Console Foundations

Achieved
Jan 13, 2015
Achievement
Console Users and Permission

Console Foundations

Achieved
Jan 12, 2015
Achievement
Moving Around in the Console

Console Foundations

Achieved
Jan 11, 2015
Achievement
Chrome DevTools Basics

Website Optimization

Achieved
Jan 10, 2015
Achievement
Web Apps

Accessibility

Achieved
Jan 9, 2015
Achievement
Websites

Accessibility

Achieved
Jan 9, 2015
Achievement
Introduction

Accessibility

Achieved
Jan 9, 2015
Achievement
AJAX and APIs

AJAX Basics (retiring)

Achieved
Jan 9, 2015
Achievement
jQuery and AJAX

AJAX Basics (retiring)

Achieved
Jan 8, 2015
Achievement
Programming AJAX

AJAX Basics (retiring)

Achieved
Jan 8, 2015
Achievement
AJAX Concepts

AJAX Basics (retiring)

Achieved
Jan 8, 2015
Achievement
Custom Media Players

HTML Video and Audio (Retired)

Achieved
Jan 8, 2015
Achievement
Captioning Video

HTML Video and Audio (Retired)

Achieved
Jan 7, 2015
Achievement
Media Basics

HTML Video and Audio (Retired)

Achieved
Jan 7, 2015
Achievement
Structuring Tables

HTML Tables

Achieved
Jan 5, 2015
Achievement
Table Basics

HTML Tables

Achieved
Jan 5, 2015
Achievement
Creating a Simple Drawing Application

jQuery Basics (2014)

Achieved
Jan 3, 2015
Achievement
Creating a Password Confirmation Form

jQuery Basics (2014)

Achieved
Jan 3, 2015
Achievement
Creating a Mobile Drop Down Menu

jQuery Basics (2014)

Achieved
Jan 3, 2015
Achievement
Creating a Simple Lightbox

jQuery Basics (2014)

Achieved
Jan 2, 2015
Achievement
Creating a Spoiler Revealer

jQuery Basics (2014)

Achieved
Jan 2, 2015
Achievement
Introduction to jQuery

jQuery Basics (2014)

Achieved
Jan 2, 2015
Achievement
Traversing and Manipulating the DOM with JavaScript

Interactive Web Pages with JavaScript

Achieved
Dec 30, 2014
Achievement
Selecting Elements and Adding Events with JavaScript

Interactive Web Pages with JavaScript

Achieved
Dec 29, 2014
Achievement
JavaScript and the DOM

Interactive Web Pages with JavaScript

Achieved
Dec 28, 2014
Achievement
Choosing Options

HTML Forms

Achieved
Dec 27, 2014
Achievement
Organizing Forms

HTML Forms

Achieved
Dec 27, 2014
Achievement
Form Basics

HTML Forms

Achieved
Dec 27, 2014
Achievement
JavaScript Objects

JavaScript Foundations

Achieved
Dec 26, 2014
Achievement
JavaScript Functions

JavaScript Foundations

Achieved
Dec 23, 2014
Achievement
JavaScript Arrays

JavaScript Foundations

Achieved
Dec 20, 2014
Achievement
JavaScript Numbers

JavaScript Foundations

Achieved
Dec 20, 2014
Achievement
JavaScript Strings

JavaScript Foundations

Achieved
Dec 19, 2014
Achievement
Fundamental Concepts

CSS Basics (2014)

Achieved
Dec 18, 2014
Achievement
Designing with the Latest Features

CSS Basics (2014)

Achieved
Dec 18, 2014
Achievement
Basic Layout

CSS Basics (2014)

Achieved
Dec 15, 2014
Achievement
The Box Model

CSS Basics (2014)

Achieved
Dec 14, 2014
Achievement
Understanding Values and Units

CSS Basics (2014)

Achieved
Dec 14, 2014
Achievement
Basic Selectors

CSS Basics (2014)

Achieved
Dec 14, 2014
Achievement
Getting Started with CSS

CSS Basics (2014)

Achieved
Dec 14, 2014
Achievement
Introduction Variables

JavaScript Foundations

Achieved
Nov 22, 2014
Achievement
Functions

Introduction to Programming

Achieved
Nov 17, 2014
Achievement
Objects and Arrays

Introduction to Programming

Achieved
Nov 17, 2014
Achievement
Control Structures

Introduction to Programming

Achieved
Nov 16, 2014
Achievement
Basics

Introduction to Programming

Achieved
Nov 15, 2014
Achievement
Media Queries

Unused CSS Stages

Achieved
Nov 15, 2014
Achievement
CSS Animations

Unused CSS Stages

Achieved
Nov 15, 2014
Achievement
Transitions and Transforms

Unused CSS Stages

Achieved
Nov 14, 2014
Achievement
Flexbox and Multi-Column Layout

Unused CSS Stages

Achieved
Nov 14, 2014
Achievement
Gradients

CSS Foundations

Achieved
Nov 13, 2014
Achievement
Web Typography

CSS Foundations

Achieved
Nov 9, 2014
Achievement
Backgrounds and Borders

CSS Foundations

Achieved
Nov 7, 2014
Achievement
CSS Box Model

CSS Foundations

Achieved
Nov 7, 2014
Achievement
Text, Fonts, and Lists

CSS Foundations

Achieved
Nov 7, 2014
Achievement
Values and Units

CSS Foundations

Achieved
Nov 6, 2014
Achievement
Advanced Selectors

CSS Foundations

Achieved
Nov 1, 2014
Achievement
Selectors

CSS Foundations

Achieved
Nov 1, 2014
Achievement
Getting Started with CSS

CSS Foundations

Achieved
Nov 1, 2014
Achievement
Debugging HTML and CSS Problems

How to Make a Website

Achieved
Nov 1, 2014
Achievement
Sharing a Website

How to Make a Website

Achieved
Nov 1, 2014
Achievement
Responsive Web Design and Testing

How to Make a Website

Achieved
Nov 1, 2014
Achievement
Adding Pages to a Website

How to Make a Website

Achieved
Nov 1, 2014
Achievement
Styling Web Pages and Navigation

How to Make a Website

Achieved
Oct 31, 2014
Achievement
Customizing Colors and Fonts

How to Make a Website

Achieved
Oct 30, 2014
Achievement
CSS: Cascading Style Sheets

How to Make a Website

Achieved
Oct 30, 2014
Achievement
Creating HTML Content

How to Make a Website

Achieved
Oct 30, 2014
Achievement
HTML First

How to Make a Website

Achieved
Oct 30, 2014
Achievement
Beginning HTML and CSS

How to Make a Website

Achieved
Oct 30, 2014
Achievement
JavaScript Variables

JavaScript Basics (Retired)

Achieved
Oct 30, 2014
Achievement
Introducing JavaScript

JavaScript Basics (Retired)

Achieved
Oct 30, 2014
Achievement
Newbie

Achieved
Oct 27, 2014