Cristian Gerardo Hernandez Barrios

Cristian Gerardo Hernandez Barrios

Guatemala City, Guatemala

Student of Systems Engineering I like programming

Skills & Experience

  • Spoken Languages

    • Spanish
    • English
  • Looking for work

    Yes

324 Achievements

  • Web Apps
  • Websites
  • Introduction
  • Combine and Minify Assets
  • Optimize Assets
  • Measuring Performance
  • Planning for Performance
  • Building Forms With Bootstrap
  • Using Bootstrap Components
  • Responsive Layouts With the Bootstrap Grid
  • Getting to Know Bootstrap 4
  • Creating a Simple Drawing Application
  • Creating a Password Confirmation Form
  • Creating a Mobile Drop Down Menu
  • Creating a Simple Lightbox
  • Creating a Spoiler Revealer
  • Introduction to jQuery
  • Building Forms with Bootstrap
  • Using Bootstrap Components
  • Responsive Layouts with the Bootstrap Grid
  • Getting to Know Bootstrap 4
  • Captioning Video
  • Media Basics
  • Getting Started with Android
  • Chrome DevTools Basics
  • Parsing Specific Formats
  • Basic File Handling
  • Updating and Deleting Records
  • Reading and Writing Reports
  • Creating Records
  • Project Setup
  • Browser Persistent Data with PHP
  • Finishing the Game
  • Introducing JavaScript
  • Bokeh Visualizations
  • Bokeh Data
  • Exploration
  • Discovery
  • The Rest of the Story
  • Finishing the User Interface
  • The Model-View-Presenter Pattern
  • Intents and Multiple Activities
  • Tuning the User Interface
  • User Input in Android
  • Testing and Debugging
  • Improving Our Code
  • Basic Android Programming
  • Creating the Screen Layout
  • Add Reusable Logic to Your Sass
  • Write Smart and Efficient CSS with Sass
  • Improve Your Workflow with Sass
  • Getting Started with Sass
  • Finalizing the Project
  • Case Studies and Examples
  • The Brand Identity Design Process
  • Introduction to Brand Identity
  • The Logo Sprint
  • Logo Design 101
  • Keyframe and Line Drawing Animations
  • Transitions and Transforms
  • Creating an SVG
  • Introduction to SVG
  • Adding 3D Effects with CSS
  • Getting Started with CSS Transforms
  • Practicing Data Visualization in Excel
  • Chart Formatting and Layout
  • When To Use What Type of Chart
  • Introduction To Data Visualization
  • Transition Timing Functions and Delays
  • Getting Started with CSS Transitions
  • Save for the Web
  • Adding Images and a Mockup
  • Logo Design
  • Creating a Wireframe
  • Introducing Adobe Illustrator
  • Workflow Basics
  • Slices & Save for Web
  • Vector Shapes
  • Type Tools
  • Masks Basics
  • Layer Basics
  • Workspace Basics
  • Efficiency!
  • Exploring the Java Collections Framework
  • Organizing Data
  • Getting There
  • Creating a Command Line Weather Application
  • Handling Errors in Node
  • Getting Data From an API With Node
  • Introduction to Node.js
  • Classes
  • Objects and New Collection Types
  • The Cooler Parts of ES2015
  • Day 3: Getting Creative
  • Day 2: Advanced Selecting
  • Day 1: Joining Tables
  • Orientation: Selecting Data
  • Big Data at Netflix
  • Where and How Big Data Is Used
  • Callbacks and the DOM
  • What is Big Data
  • Callbacks with Timers
  • Introduction to Callback Functions
  • ES2015 Basics
  • Quiz Practice Project
  • Prototypal Inheritance
  • Constructor Functions & Prototypes
  • Introduction to Methods
  • AJAX and APIs
  • jQuery and AJAX
  • Programming AJAX
  • AJAX Concepts
  • Using a jQuery Carousel
  • Add a Sticky Navigation Bar
  • Introducing jQuery Plugins
  • DOM Traversal
  • DOM Manipulation
  • Events
  • Hello, jQuery!
  • Improving the Application Code
  • Editing and Filtering Names
  • Adding and Removing Names
  • Traversing the DOM
  • Responding to User Interaction
  • Making Changes to the DOM
  • Getting a Handle on the DOM
  • Physics Setup
  • The Browser Environment
  • Going Further with HTML
  • Images, Text and Links
  • Structuring Your Content
  • Getting Started With HTML
  • JavaScript Objects
  • JavaScript Arrays
  • JavaScript Loops
  • Building a Layout with Flexbox
  • Flexbox Properties
  • Understanding Flexbox
  • Responsive Patterns
  • Media Queries
  • Responsive Theory
  • Positioning Page Content
  • CSS Layout Project
  • Page Layout with the Float Property
  • Controlling Layout with CSS Display Modes
  • Getting Started with CSS Layout
  • Structuring Tables
  • Table Basics
  • Choosing Options
  • Organizing Forms
  • Form Basics
  • Design Foundations Final
  • Becoming a Problem Solver
  • Understanding Aesthetics
  • JavaScript Functions
  • JavaScript Conditional Statements
  • Model Administration
  • What a View
  • Say Hello to Django
  • Gettin' CRUD-y With It
  • Our Diary App
  • Meet Peewee
  • Python Slices
  • Advanced Selectors
  • Going Further with Attribute Selectors and Pseudo-Classes
  • Selectors - Beyond the Basics
  • JavaScript Numbers
  • JavaScript Variables
  • Fundamental Concepts
  • Designing with the Latest Features
  • Basic Layout
  • Introducing JavaScript
  • Build a Spreadsheet
  • Spreadsheet Best Practices
  • Spreadsheet Functions & Formulas
  • Getting Started With Spreadsheets
  • Security: Solutions
  • Testing and Publishing an Alexa Skill
  • Building an Alexa Skill
  • The Box Model
  • Introduction to Design
  • Python Lists
  • Understanding Values and Units
  • Basic Selectors
  • Go Syntax Overview
  • Letter Game App
  • Number Game App
  • Shopping List App
  • Getting Started with CSS
  • Lists, Code, Links and Images
  • Understanding Markdown
  • S3 Storage Service
  • AWS and "The Cloud"
  • Logic in Python
  • Introduction to Video Games
  • Debugging HTML and CSS Problems
  • Sharing a Website
  • Responsive Web Design and Testing
  • VR Setup
  • Adding Pages to a Website
  • Getting Started with Android
  • Python Data Types
  • Python For Beginners
  • Styling Web Pages and Navigation
  • Customizing Colors and Fonts
  • Discovery
  • CSS: Cascading Style Sheets
  • Creating HTML Content
  • HTML First
  • Methods
  • Object-Oriented Programming
  • Beginning HTML and CSS
  • Perfect
  • Perform
  • Console I/O
  • Prepare and Plan
  • Introducing Spreadsheets
  • Security: Concerns
  • Alexa Skills Kit Overview
  • Delivering the MVP
  • PHPDB Stage 5: Search
  • PHPDB Stage 4: Pagination with LIMITs
  • PHPDB Stage 3: Using Relational Data
  • PHPDB Stage 2: Querying the Database with PHP
  • PHPDB Stage 1: Databases and PHP
  • MASH JavaScript
  • MASH CSS
  • MASH HTML
  • Treehouse Club - JavaScript
  • Treehouse Club - CSS
  • Welcome to the Treehouse Club
  • Sinatra Finishing Touches
  • Updating Data in Sinatra
  • Adding New Data in Sinatra
  • Sinatra ERB Templates
  • Creating New Sinatra Apps
  • Gems In Depth
  • Ruby Gems
  • Ruby Standard Library: Part 2
  • Ruby Standard Library: Part 1
  • Ruby Core
  • Store Inventory Using Modules
  • Include and Extend
  • Ruby Core Modules
  • Ruby Module Basics
  • Input and Output
  • Search
  • Ruby Class Design
  • Blocks Practice
  • Working With Blocks
  • Ruby Blocks
  • Build a Simple Todo List Program
  • Ruby Booleans
  • Build a Bank Account Class
  • Ruby Variables and Methods
  • Ruby Objects and Classes
  • Why Web Performance Matters
  • Build a Simple Contact List
  • Ruby Iteration
  • Ruby Loops
  • Build a Grocery List Program
  • Ruby Hashes
  • Ruby Arrays
  • Computer Languages
  • Computer Basics
  • Ruby Logical Operators
  • Ruby Control Structures
  • Ruby Operators
  • WWW
  • The Internet
  • Ruby Methods
  • Ruby Numbers (Ruby Basics)
  • Ruby Strings (Ruby Basics)
  • How Ruby Works
  • WordPress User Roles
  • WordPress Plugins
  • WordPress Themes
  • The WordPress Customizer
  • Managing Media in WordPress
  • Managing Content in WordPress
  • How to Install WordPress on Your Computer
  • What Is WordPress?
  • Subqueries
  • Set Operations
  • Joining Table Data with SQL
  • Table Relationships
  • Database Keys
  • Database Normalization
  • Date and Time Functions
  • Aggregate and Numeric Functions
  • Working with Text
  • Ordering, Limiting and Paging Results
  • Handling Errors When Manipulating Data
  • Deleting Data from a Database
  • Updating Data in a Database
  • Adding Data to a Database
  • Finding the Data You Want
  • Getting Data from a Database
  • Data, Databases and SQL
  • Creating the MVP
  • Harnessing the Power of Objects
  • Meet Objects
  • Perfecting the Prototype
  • Using your New Tools
  • Getting Started with Java
  • PHP Email Form Errors
  • PHP Email Forms
  • PHP Inventory
  • PHP Includes
  • PHP Internal Functions
  • PHP Returns & Closures
  • PHP Functions Basics
  • PHP Loops
  • PHP Arrays
  • PHP Conditionals
  • PHP on the Web
  • Daily Exercise Program
  • Unit Converter
  • Getting to Know PHP
  • Adding a New Web Page
  • Make It Beautiful with CSS
  • HTML: The Structural Foundation of Web Pages and Applications
  • Getting Familiar with HTML and CSS
  • Newbie