Woongshik Choi

Woongshik Choi

Member Since September 15, 2013

42,387

Total Points

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

Skills & Experience

  • Spoken Languages

    • English
    • Korean
  • Publications

    • Keynote Like A Pro
    • iStart iBooks Author(Multi-touch)
    • iStart Keynote for iPad
    • PRESENTED
    • Udemy - iStart iBooks Author::Publish your book on iBookstore
  • Looking for work

    Yes

510 Achievements

  • Getting the REST You Need
  • GET and POST Requests in a Browser
  • Introduction to HTTP
  • Error Handling in Swift 2.0
  • Making Strong Users
  • Character Builder
  • Flask Templates
  • Welcome to Flask
  • What a View
  • Say Hello to Django
  • Covering Your Bases
  • Be Assertive!
  • What Is Testing?
  • Gettin' CRUD-y With It
  • Our Diary App
  • Meet Peewee
  • Finding the Data You Want
  • Getting Data from a Database
  • Data, Databases and SQL
  • Python Regular Expressions
  • Quiz Practice Project
  • Prototypal Inheritance
  • Constructor Functions & Prototypes
  • Introduction to Methods
  • Timezones
  • Math Quiz App
  • Dates and Times
  • Buggy Logs
  • Cleaner Code
  • Local Python
  • Hack-n-Slash
  • Python Inheritance
  • Python Objects
  • Dungeon Game
  • Tuples
  • Dictionaries
  • Slices
  • Lists Redux
  • Creating Flexible Objects Using Protocols
  • Swift 2.0 Protocols
  • Python Data Types
  • Letter Game App
  • Number Game App
  • Shopping List App
  • Logic in Python
  • Python For Beginners
  • Objects and Optionals
  • Introduction to Optionals
  • Introduction to Enumerations
  • Building a Layout with Flexbox
  • Flexbox Properties
  • Understanding Flexbox
  • Running Apps on a Device
  • Improving Our User Interface
  • Structs as Data Models
  • View Controllers and Views
  • Getting Started with iOS Development
  • Differentiating Between Objects
  • Class Inheritance
  • Classes
  • Complex Data Structures
  • Function Parameters
  • Functions in Swift 2.0
  • Control Flow with Conditional Statements
  • Control Flow With Loops
  • Swift Dictionaries
  • Introduction to Collections
  • Swift Operators
  • Swift Types
  • Positioning Page Content
  • CSS Layout Project
  • Page Layout with the Float Property
  • Controlling Layout with CSS Display Modes
  • Getting Started with CSS Layout
  • An Introduction to Swift Programming
  • Implementing the Detail View
  • Custom Table View Cells
  • Next Week's Weather
  • Upgrading Stormy
  • Delegation in iOS
  • Introduction to Delegates
  • Creating Flexible Objects with Protocols
  • Protocols
  • Introduction to Table Views
  • Managing Complexity
  • Refreshing the Data
  • Adding Weather Icons
  • Interacting With Data From the Web
  • Simple Data Structures
  • Closures in iOS
  • Closures and Closure Expressions
  • Functions as First Class Citizens
  • Understanding Core Data
  • JavaScript Objects
  • JavaScript Arrays
  • JavaScript Loops
  • Responsive Patterns
  • Media Queries
  • Responsive Theory
  • Final Project: Create a Typographic Site
  • Laying Out Type for the Web
  • Basic Web Typography
  • How to Choose and Use Webfonts
  • Introduction to Typography
  • Simple Mobile Interface
  • Exporting Designs
  • Sketch Features
  • Introducing Sketch
  • Archive Templates in WordPress
  • A Template Hierarchy Review
  • Media Templates in WordPress
  • Custom Post Type Templates
  • Page and Post Templates in WordPress
  • Homepage Templates in WordPress
  • Core WordPress Theme Files
  • Creating an SVG
  • Introduction to SVG
  • Working with Media Queries
  • CSS Animation Basics
  • Understanding CSS Transitions and Transforms
  • Understanding Flexbox and Multi-Column Layout
  • Next Steps
  • Financing Our Company
  • Selling Your Product
  • Marketing Your Product
  • Product Market Fit
  • Discovery
  • PHP Inheritance & Interfaces
  • PHP Properties & Methods
  • PHP Objects and Classes
  • PHP Internal Functions
  • PHP Returns & Closures
  • PHP Functions Basics
  • PHP Loops
  • PHP Conditionals
  • PHP Datatypes
  • Spriting with Compass
  • Compass Helper Functions
  • Compass Layout and Typography
  • PHP Data & Structure
  • How WordPress Templates Work
  • Moving from WordPress.com to Self-Hosted WordPress.org
  • Build a Website With Bootstrap
  • Prototyping With Bootstrap
  • WordPress User Roles
  • The WordPress Codex
  • Local WordPress Development
  • Getting Started with Compass
  • Advanced Selectors
  • Going Further with Attribute Selectors and Pseudo-Classes
  • Selectors - Beyond the Basics
  • Advanced Directives
  • Concepts on Advanced Functions
  • Advanced Variables, Mixins, Functions, and Placeholders
  • Getting Started with Advanced Sass
  • Treehouse Club - CSS
  • Modular Media Queries
  • Sass Grid System
  • Fundamental Concepts
  • Designing with the Latest Features
  • Basic Layout
  • The Box Model
  • Understanding Values and Units
  • Basic Selectors
  • Refactoring Our Code (Swift)
  • Building the Master and Detail Views (Swift)
  • Building a Music Library and Playlists (Swift)
  • Using a Navigation Controller With Segues (Swift)
  • Working With Multiple View Controllers (Swift)
  • Getting Started with CSS
  • SMACSS and Sass
  • Sass and BEM
  • Getting Modular with Mixins and Functions
  • Displaying Our Weather Data
  • Data Modeling With Structures
  • Concurrency
  • Pulling Data From the Web
  • Deploying to a Device
  • Debugging Our App
  • Improving Our User Interface
  • Using a Data Model
  • Views and View Controllers
  • Getting Started with Xcode
  • Swift Value vs Reference Types
  • Swift Properties
  • Swift Inheritance
  • Swift Classes and Objects
  • Swift Structs and their Methods
  • Swift Structs
  • Swift Enums and their Methods
  • Swift Enums
  • Swift Optionals
  • Swift Parameters and Tuples
  • Swift Functions
  • Control Flow
  • Collections
  • Operators
  • Types
  • Variables and Constants
  • Ins & Outs
  • Say Hello to Python
  • PHP Getting Started
  • Running an Ecommerce Site Long Term
  • Extending WooCommerce
  • Managing Orders in WooCommerce
  • Managing Products in WooCommerce
  • Setting Up WooCommerce
  • WordPress Plugin Best Practices
  • Widgets and Custom Menus
  • Custom Post Types and Fields
  • Customizing WordPress Themes
  • Content Strategy with WordPress
  • Finding Good WordPress Plugins and Themes
  • Managing Comments on a WordPress Blog
  • Working with Media in WordPress Blogs
  • Posts and Pages in WordPress
  • Blogging with WordPress Overview
  • Getting Started with WordPress
  • MASH JavaScript
  • MASH CSS
  • MASH HTML
  • Treehouse Club - JavaScript
  • Customizing Google Maps
  • Google Maps Integration
  • jQuery Plugins
  • Form Validation and Manipulation
  • JavaScript Functions
  • JavaScript Conditional Statements
  • JavaScript Numbers
  • Custom Media Players
  • Captioning Video
  • Media Basics
  • Introduction to Ecommerce with WordPress
  • JavaScript Variables
  • Introducing JavaScript
  • Objects, Classes, and Variables
  • Ruby Basics
  • Ruby Methods
  • Ruby Numbers (Ruby Basics)
  • Ruby Strings (Ruby Basics)
  • How Ruby Works
  • Why Version Control Matters
  • Chrome DevTools Basics
  • AJAX and APIs
  • jQuery and AJAX
  • Programming AJAX
  • AJAX Concepts
  • Traversing and Manipulating the DOM with JavaScript
  • Selecting Elements and Adding Events with JavaScript
  • JavaScript and the DOM
  • Introduction to jQuery
  • Writing Online
  • Soft Skills - Psychology
  • Structuring Tables
  • Table Basics
  • Build a Website With Foundation
  • What's New in Foundation 5
  • Prototyping With Foundation
  • Creating a Simple Drawing Application
  • Creating a Password Confirmation Form
  • Creating a Mobile Drop Down Menu
  • Creating a Simple Lightbox
  • Web Apps
  • Choosing Options
  • Organizing Forms
  • Finalizing the Project
  • Case Studies and Examples
  • The Brand Identity Design Process
  • Introduction to Brand Identity
  • Websites
  • Introduction
  • Form Basics
  • Introduction to Front-End Frameworks
  • Creating a Spoiler Revealer
  • Introduction to jQuery
  • Productivity
  • WordPress Themes
  • Installing Wordpress
  • Cocoapods
  • Animate This (iOS7)
  • Debugging HTML and CSS Problems
  • Responsive Web Design and Testing
  • Adding Pages to a Website
  • Styling Web Pages and Navigation
  • Sharing a Website
  • Customizing Colors and Fonts
  • CSS: Cascading Style Sheets
  • Creating HTML Content
  • HTML First
  • Beginning HTML and CSS
  • Advanced Sass Concepts
  • Speeding up Workflow With Sass
  • Variables, Mixins, and Extending Selectors
  • Getting Started with Sass
  • Moving Forward with UX
  • Tools UXers Use
  • How UXers Think
  • What Do User Experience Designers Do?
  • What is User Experience (UX)?
  • Owning a WordPress Site Long Term
  • Working with Media in WordPress
  • Adding and Editing Content
  • WordPress Community Management
  • Getting a WordPress Site
  • WordPress Admin Settings
  • Better SEO Through Tools
  • Better SEO Through Code
  • Better SEO Through Content
  • Introduction to SEO
  • Grid Layout
  • Flexbox Layout
  • Positioning Schemes
  • Float Layout
  • Display Modes
  • Business Plan for Freelance Business
  • Customizing WordPress
  • Adding and Editing Content in WordPress
  • JavaScript Objects
  • JavaScript Functions
  • Beyond the Basics
  • Installing Programs
  • Environment and Redirection
  • Improving Usability
  • Mobile Usability
  • Website Usability
  • Presentation Skills
  • Important Skills For Professional Success
  • What is Usability?
  • Business Plan Basics
  • The Logo Sprint
  • Logo Design 101
  • Console Processes
  • Console Users and Permission
  • Moving Around in the Console
  • Working with a Developer
  • Designing our App
  • Wireframing, Interaction Design and Planning
  • ADS Writing and Preparation
  • Introduction to UI Design
  • JavaScript Arrays
  • JavaScript Numbers
  • Simple PHP Application: Wrapping Up The Project
  • Working with PHP Functions
  • Integrating With Paypal
  • Listing Inventory Items
  • Adding a Contact Form
  • Creating the Menu and Footer
  • Getting Started with PHP
  • JavaScript Strings
  • Introduction Variables
  • Functions
  • Objects and Arrays
  • Control Structures
  • Basics
  • Advanced Techniques
  • Responsive Design
  • Adaptive Design
  • Fluid Foundation
  • Introduction to Responsive Web Design
  • Media Queries
  • CSS Animations
  • Transitions and Transforms
  • Flexbox and Multi-Column Layout
  • Managing Comments
  • Configuring WordPress
  • Securing and Maintaining a MySQL Database
  • Gradients
  • Web Typography
  • Going Mobile
  • Designing Email with CSS
  • Coding HTML Email
  • HTML Email Basics
  • Joining Relational Data Between Tables in SQL
  • Manipulating Schema with SQL
  • Backgrounds and Borders
  • Advanced Selectors
  • Reading Data from Databases with SQL
  • CSS Box Model
  • Introduction to Data, Databases and SQL
  • Installing MySQL Server and MySQL Workbench
  • Text, Fonts, and Lists
  • Advanced Objective-C
  • Foundation Framework
  • Introduction to Objective-C
  • Pointers and Memory
  • Functional Programming in C
  • Finishing the User Interface
  • Customizing Table View Controllers
  • Fundamentals of C
  • Using Auto Layout and Managing the Keyboard
  • Testing and Debugging
  • Designing your App
  • Refactoring into a Model
  • Values and Units
  • Selectors
  • Getting Started with CSS
  • Forms
  • Tables
  • Objects
  • Links
  • Creating a Long Term Business
  • Protecting Yourself With Contracts
  • Establishing a Proper Workflow
  • Pricing and Project Proposals
  • Finding Your First Project
  • Starting a Freelance Career
  • Creating Home Page Assets
  • Applying Effects
  • Lists
  • Text
  • How to Draw in Illustrator
  •  Adding Color and Type
  • Creating an Icon
  • Workflow Basics
  • Slices & Save for Web
  • Vector Shapes
  • Type Tools
  • Masks Basics
  • Layer Basics
  • Implementing Custom Login and Sign Up Screens
  • Metrics
  • Sales
  • Pricing
  • Financing Your Company
  • From Idea to Execution
  • Workspace Basics
  • Creating a Data Collection
  • Professional Development
  • Applying & Interviewing
  • The Job Search
  • Networking
  • Understanding Views and View Controllers
  • Getting Started (iOS7)
  • Introduction
  • Personal Branding
  • Setting Your Course
  • Careers in the Tech Industry
  • Self-Assessment
  • Website Basics
  • Getting Started with WordPress
  • Design Foundations Final
  • Becoming a Problem Solver
  • Understanding Aesthetics
  • Introduction to Design
  • Launching the Website
  • Styling Content
  • Introduction to Accounting
  • Marketing Strategy
  • Forming Your Company
  • Protecting and Sharing Your Work
  • Marketing Basics
  • Creating a Website Structure
  • Making Money
  • Text Editors and HTML
  • Website Basics
  • Licensing
  • Fair Use and Public Domain
  • Getting Started with Copyright
  • Getting Work Done
  • A Lifestyle Choice
  • Growing Your Business
  • Client Services
  • Sales and Pitching
  • Marketing and Promotion
  • Video Marketing
  • Email Marketing
  • Search Engine Optimization
  • Usability Testing
  • Usability Basics
  • Social Media
  • Moving Beyond the Blog
  • Finding Business
  • Creating Content
  • Introduction to Blogging
  • Introduction to Illustrator
  • DNS Basics
  • Graphic Basics
  • Retrieving and Viewing Data from Parse.com
  • Capturing Photo and Video Using UIImagePickerController
  • Relating Users in Parse.com
  • Color Theory
  • Principles
  • Elements
  • Location
  • API Access
  • Blocks and Categories
  • App Settings
  • Appearance
  • Notifications
  • iOS 5 Core Data
  • Using Parse.com as a Backend and Adding Users
  • Corporate Structure
  • Designing and Starting the App
  • Web View
  • Why Start a Business?
  • Storyboards
  • Viewing a Web Page
  • Adapting Data for Display
  • Data Modeling
  • Getting Data from the Web
  • Rebuilding from Scratch
  • Exploring the Master-Detail Template
  • Automatic Reference Counting
  • Making It Pretty
  • Share Your Creation
  • Animate This
  • Shaking Things Up
  • Learning the Language
  • Getting Started with iPhone
  • Newbie