Jin He

Jin He

New York, NY

Hello, everybody~

8,123

Total Points

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

Skills & Experience

  • Company

    Columbia University

107 Achievements

  • Achievement

    Form Builders and Rails

    Ruby on Rails Forms

    Achieved

    Sep 7, 2014

    Form Builders and Rails
  • Achievement

    Creating an App Tutorial

    Blank Slates in Ruby on Rails

    Achieved

    Sep 2, 2014

    Creating an App Tutorial
  • Achievement

    Blank Slates and Rails

    Blank Slates in Ruby on Rails

    Achieved

    Sep 2, 2014

    Blank Slates and Rails
  • Achievement

    Email with Rails

    Blank Slates in Ruby on Rails

    Achieved

    Sep 2, 2014

    Email with Rails
  • Achievement

    Values and Units

    CSS Foundations

    Achieved

    Aug 20, 2014

    Values and Units
  • Achievement

    Rails Deployment

    Build a Simple Ruby on Rails Application

    Achieved

    Aug 20, 2014

    Rails Deployment
  • Achievement

    Advanced Selectors

    CSS Foundations

    Achieved

    Aug 15, 2014

    Advanced Selectors
  • Achievement

    Selectors

    CSS Foundations

    Achieved

    Aug 14, 2014

    Selectors
  • Achievement

    Styling Rails Forms

    Ruby on Rails Forms

    Achieved

    Aug 13, 2014

    Styling Rails Forms
  • Achievement

    Advanced Sass Concepts

    Sass Basics (retired)

    Achieved

    Aug 11, 2014

    Advanced Sass Concepts
  • Achievement

    Styling Rails Models

    Rails Partials and Helpers

    Achieved

    Aug 9, 2014

    Styling Rails Models
  • Achievement

    Ruby on Rails Helpers

    Rails Partials and Helpers

    Achieved

    Aug 9, 2014

    Ruby on Rails Helpers
  • Achievement

    Rails Partials

    Rails Partials and Helpers

    Achieved

    Aug 9, 2014

    Rails Partials
  • Achievement

    AR Extensions

    ActiveRecord Basics

    Achieved

    Aug 8, 2014

    AR Extensions
  • Achievement

    Callbacks

    ActiveRecord Basics

    Achieved

    Aug 8, 2014

    Callbacks
  • Achievement

    Query Interface

    ActiveRecord Basics

    Achieved

    Aug 7, 2014

    Query Interface
  • Achievement

    Validation

    ActiveRecord Basics

    Achieved

    Aug 7, 2014

    Validation
  • Achievement

    Migrations and Relationships

    ActiveRecord Basics

    Achieved

    Aug 6, 2014

    Migrations and Relationships
  • Achievement

    Speeding up Workflow With Sass

    Sass Basics (retired)

    Achieved

    Aug 5, 2014

    Speeding up Workflow With Sass
  • Achievement

    Styling a Header

    The Rails Asset Pipeline and Styling

    Achieved

    Aug 5, 2014

    Styling a Header
  • Achievement

    Variables, Mixins, and Extending Selectors

    Sass Basics (retired)

    Achieved

    Aug 5, 2014

    Variables, Mixins, and Extending Selectors
  • Achievement

    Getting Started with Sass

    Sass Basics (retired)

    Achieved

    Aug 5, 2014

    Getting Started with Sass
  • Achievement

    Sass and Rails

    The Rails Asset Pipeline and Styling

    Achieved

    Aug 5, 2014

    Sass and Rails
  • Achievement

    Prototyping With Bootstrap

    Framework Basics

    Achieved

    Aug 4, 2014

    Prototyping With Bootstrap
  • Achievement

    Introduction to Front-End Frameworks

    Framework Basics

    Achieved

    Aug 2, 2014

    Introduction to Front-End Frameworks
  • Achievement

    Getting Started with CSS

    CSS Foundations

    Achieved

    Aug 2, 2014

    Getting Started with CSS
  • Achievement

    Ruby Testing

    Ruby Foundations

    Achieved

    Aug 1, 2014

    Ruby Testing
  • Achievement

    Standard Library

    Ruby Foundations

    Achieved

    Aug 1, 2014

    Standard Library
  • Achievement

    Ruby Core

    Ruby Foundations

    Achieved

    Aug 1, 2014

    Ruby Core
  • Achievement

    Choosing Options

    HTML Forms

    Achieved

    Aug 1, 2014

    Choosing Options
  • Achievement

    Organizing Forms

    HTML Forms

    Achieved

    Aug 1, 2014

    Organizing Forms
  • Achievement

    Form Basics

    HTML Forms

    Achieved

    Aug 1, 2014

    Form Basics
  • Achievement

    Ruby Modules

    Ruby Foundations

    Achieved

    Aug 1, 2014

    Ruby Modules
  • Achievement

    Ruby Procs & Lambdas

    Ruby Foundations

    Achieved

    Aug 1, 2014

    Ruby Procs & Lambdas
  • Achievement

    Ruby Blocks

    Ruby Foundations

    Achieved

    Aug 1, 2014

    Ruby Blocks
  • 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

    Securing and Maintaining a MySQL Database

    Database Foundations

    Achieved

    Jul 31, 2014

    Securing and Maintaining a MySQL Database
  • Achievement

    SQL Calculating, Aggregating and Other Functions

    Database Foundations

    Achieved

    Jul 31, 2014

    SQL Calculating, Aggregating and Other Functions
  • Achievement

    Joining Relational Data Between Tables in SQL

    Database Foundations

    Achieved

    Jul 31, 2014

    Joining Relational Data Between Tables in SQL
  • Achievement

    Ruby Loops

    Ruby Foundations

    Achieved

    Jul 30, 2014

    Ruby Loops
  • Achievement

    Manipulating Schema with SQL

    Database Foundations

    Achieved

    Jul 30, 2014

    Manipulating Schema with SQL
  • Achievement

    Creating Tables and Manipulating Data with SQL

    Database Foundations

    Achieved

    Jul 30, 2014

    Creating Tables and Manipulating Data with SQL
  • Achievement

    Reading Data from Databases with SQL

    Database Foundations

    Achieved

    Jul 29, 2014

    Reading Data from Databases with SQL
  • Achievement

    Installing MySQL Server and MySQL Workbench

    Database Foundations

    Achieved

    Jul 29, 2014

    Installing MySQL Server and MySQL Workbench
  • Achievement

    Introduction to Data, Databases and SQL

    Database Foundations

    Achieved

    Jul 29, 2014

    Introduction to Data, Databases and SQL
  • Achievement

    Web Apps

    Accessibility

    Achieved

    Jul 28, 2014

    Web Apps
  • Achievement

    Websites

    Accessibility

    Achieved

    Jul 28, 2014

    Websites
  • Achievement

    Introduction

    Accessibility

    Achieved

    Jul 28, 2014

    Introduction
  • Achievement

    Forms

    HTML

    Achieved

    Jul 27, 2014

    Forms
  • Achievement

    Objects

    HTML

    Achieved

    Jul 27, 2014

    Objects
  • Achievement

    Tables

    HTML

    Achieved

    Jul 27, 2014

    Tables
  • Achievement

    Links

    HTML

    Achieved

    Jul 27, 2014

    Links
  • Achievement

    Lists

    HTML

    Achieved

    Jul 26, 2014

    Lists
  • Achievement

    Text

    HTML

    Achieved

    Jul 26, 2014

    Text
  • Achievement

    JavaScript Objects

    JavaScript Foundations

    Achieved

    Jul 26, 2014

    JavaScript Objects
  • Achievement

    JavaScript Functions

    JavaScript Foundations

    Achieved

    Jul 26, 2014

    JavaScript Functions
  • Achievement

    JavaScript Arrays

    JavaScript Foundations

    Achieved

    Jul 26, 2014

    JavaScript Arrays
  • Achievement

    JavaScript Numbers

    JavaScript Foundations

    Achieved

    Jul 26, 2014

    JavaScript Numbers
  • Achievement

    JavaScript Strings

    JavaScript Foundations

    Achieved

    Jul 26, 2014

    JavaScript Strings
  • Achievement

    Introduction to jQuery

    jQuery Basics (2014)

    Achieved

    Jul 25, 2014

    Introduction to jQuery
  • Achievement

    Chrome DevTools Basics

    Website Optimization

    Achieved

    Jul 25, 2014

    Chrome DevTools Basics
  • Achievement

    Installing Programs

    Console Foundations

    Achieved

    Jul 25, 2014

    Installing Programs
  • Achievement

    Environment and Redirection

    Console Foundations

    Achieved

    Jul 25, 2014

    Environment and Redirection
  • Achievement

    DNS Basics

    Technology Foundations

    Achieved

    Jul 24, 2014

    DNS Basics
  • Achievement

    Graphic Basics

    Technology Foundations

    Achieved

    Jul 24, 2014

    Graphic Basics
  • Achievement

    Console Processes

    Console Foundations

    Achieved

    Jul 23, 2014

    Console Processes
  • Achievement

    Console Users and Permission

    Console Foundations

    Achieved

    Jul 22, 2014

    Console Users and Permission
  • Achievement

    Workflows

    Git Basics

    Achieved

    Jul 21, 2014

    Workflows
  • Achievement

    Working With Remote Repositories

    Git Basics

    Achieved

    Jul 21, 2014

    Working With Remote Repositories
  • Achievement

    Introduction

    HTML

    Achieved

    Jul 20, 2014

    Introduction
  • Achievement

    Debugging HTML and CSS Problems

    How to Make a Website

    Achieved

    Jul 19, 2014

    Debugging HTML and CSS Problems
  • Achievement

    Sharing a Website

    How to Make a Website

    Achieved

    Jul 19, 2014

    Sharing a Website
  • Achievement

    Responsive Web Design and Testing

    How to Make a Website

    Achieved

    Jul 19, 2014

    Responsive Web Design and Testing
  • Achievement

    Adding Pages to a Website

    How to Make a Website

    Achieved

    Jul 19, 2014

    Adding Pages to a Website
  • Achievement

    Introduction Variables

    JavaScript Foundations

    Achieved

    Jul 18, 2014

    Introduction Variables
  • Achievement

    Merging

    Git Basics

    Achieved

    Jul 18, 2014

    Merging
  • Achievement

    Branches

    Git Basics

    Achieved

    Jul 18, 2014

    Branches
  • Achievement

    Getting Started With Git

    Git Basics

    Achieved

    Jul 17, 2014

    Getting Started With Git
  • Achievement

    Why Version Control Matters

    Git Basics

    Achieved

    Jul 17, 2014

    Why Version Control Matters
  • Achievement

    Moving Around in the Console

    Console Foundations

    Achieved

    Jul 17, 2014

    Moving Around in the Console
  • Achievement

    Ruby Hashes

    Ruby Foundations

    Achieved

    Jul 17, 2014

    Ruby Hashes
  • Achievement

    Styling Web Pages and Navigation

    How to Make a Website

    Achieved

    Jul 17, 2014

    Styling Web Pages and Navigation
  • Achievement

    Customizing Colors and Fonts

    How to Make a Website

    Achieved

    Jul 17, 2014

    Customizing Colors and Fonts
  • Achievement

    CSS: Cascading Style Sheets

    How to Make a Website

    Achieved

    Jul 16, 2014

    CSS: Cascading Style Sheets
  • Achievement

    Ruby Methods

    Ruby Foundations

    Achieved

    Jul 14, 2014

    Ruby Methods
  • Achievement

    Ruby Arrays

    Ruby Foundations

    Achieved

    Jul 14, 2014

    Ruby Arrays
  • Achievement

    Ruby Numbers

    Ruby Foundations

    Achieved

    Jul 14, 2014

    Ruby Numbers
  • Achievement

    Ruby Strings

    Ruby Foundations

    Achieved

    Jul 14, 2014

    Ruby Strings
  • Achievement

    Customizing Ruby on Rails Forms

    Build a Simple Ruby on Rails Application

    Achieved

    Jul 14, 2014

    Customizing Ruby on Rails Forms
  • Achievement

    Ruby on Rails Authentication

    Build a Simple Ruby on Rails Application

    Achieved

    Jul 13, 2014

    Ruby on Rails Authentication
  • Achievement

    Rails Frontend Development

    Build a Simple Ruby on Rails Application

    Achieved

    Jul 13, 2014

    Rails Frontend Development
  • Achievement

    Introduction to ActiveRecord

    ActiveRecord Basics

    Achieved

    Jul 13, 2014

    Introduction to ActiveRecord
  • Achievement

    Objects, Classes, and Variables

    Ruby Foundations

    Achieved

    Jul 13, 2014

    Objects, Classes, and Variables
  • Achievement

    Ruby Basics

    Ruby Foundations

    Achieved

    Jul 13, 2014

    Ruby Basics
  • Achievement

    Installing a Ruby Development Environment

    Installing a Ruby Development Environment

    Achieved

    Jul 12, 2014

    Installing a Ruby Development Environment
  • Achievement

    Getting Started With Rails

    Build a Simple Ruby on Rails Application

    Achieved

    Jul 12, 2014

    Getting Started With Rails
  • Achievement

    Functions

    Introduction to Programming

    Achieved

    Jul 10, 2014

    Functions
  • Achievement

    Objects and Arrays

    Introduction to Programming

    Achieved

    Jul 10, 2014

    Objects and Arrays
  • Achievement

    Control Structures

    Introduction to Programming

    Achieved

    Jul 10, 2014

    Control Structures
  • Achievement

    Basics

    Introduction to Programming

    Achieved

    Jul 10, 2014

    Basics
  • Achievement

    Creating HTML Content

    How to Make a Website

    Achieved

    Jul 9, 2014

    Creating HTML Content
  • Achievement

    HTML First

    How to Make a Website

    Achieved

    Jul 9, 2014

    HTML First
  • Achievement

    Beginning HTML and CSS

    How to Make a Website

    Achieved

    Jul 9, 2014

    Beginning HTML and CSS
  • Achievement

    Newbie

    Achieved

    Jul 9, 2014

    Newbie