C++ Classes Explained

C++ likely would not exist without classes. As the original C programming language grew more decipherable, C++ was born. Because C++ was built entirely with objects in mind, C++ uses classes to make it easy to work with objects. Classes and objects became the building blocks C++ uses for creating streamlined and easy-to-read code.

What exactly is a C++ class, and how does it tie into making it easy to use, follow and compile code? We’re glad you asked.

Continue Reading

SQL Coalesce — Weeding Through The NULLs

Relational databases store information in tables — with columns that are analogous to elements in a data structure and rows that are one instance of that data structure. In SQL, a table cell without a value contains a special marker, NULL, which is not the same as zero, an empty string, or any other kind of value that works with equality tests; i.e. NULL != 0, NULL != "“, etc. The SQL Coalesce statement is one way of processing these NULL values for common uses like text processing.

Continue Reading

What are Javascript Objects? Containers for Reusable Properties and Behaviors

Javascript is a versatile programming language; you can create short scripts of only a few lines or complex modules that contain many. Developers handling many web pages often need to reuse their Javascript code; copying and pasting scripts between pages is a tedious and error-prone process.

The Javascript standard provides the ability to create reusable code in the form of Javascript objects. Javascript objects provide complex functionality with minimal code, making new scripts easy to maintain and fast to load.

Continue Reading

The CSS Box Model: Explained for Beginners

Working within the world of HTML using CSS, site design is the ultimate goal. To reach that goal, you need to have an understanding of the way elements on a page are laid out. Quite simply, the CSS Box Model provides a guide to layout those elements. 

The CSS Box Model is used to create a definition for the way the HTML elements are organized on the screen. This approach accounts for options such as margins, padding, borders, and all the properties that manipulate them. 

Each element can be thought of as having its own box. As all the elements on a page have to work together with each other, it is quite important to know just how each of those boxes works. This brief tutorial will help explain the box model for beginners.

Continue Reading

SQL — Structured Query Language — Hub

SQL (Structured Query Language) — pronounced “sequel” or “ess queue ell” — is a computer programming language tailored to interacting with data stored in relational databases. SQL provides all the necessary tools to create, read, update, and delete (CRUD) that data.

This SQL hub lists all the Udacity blog posts which cover SQL. Armed with this information you can craft “SQL queries” — tailored requests for information — from virtually any database (including MySQL, SQLite, Apache Presto, Firebird SQL, Google BigQuery, Oracle, Microsoft SQL Server, Sybase, SAP HANA, IBM DB2, and many others).

Continue Reading

Javascript Hub: Strategies to Create Dynamic Web Pages

Javascript is a vital part of dynamic content on the modern web. From simple scripts to complex interactions that require frameworks, Javascript enhances user experiences on the web.

There are two major types of Javascript, and this Udacity Javascript hub covers both. The first type is “vanilla” Javascript, scripts you can write using the basic rules in the Javascript standard. The second type is framework-driven Javascript that creates complex content building upon others’ frameworks, like Angular and React or libraries like FusionCharts.

This Javascript hub contains easy-to-follow guides on a wide range of Javascript topics. Most articles provide sample code to demonstrate how Javascript works in the real world.

This hub is meant to be a comprehensive resource, so we will add new content as it’s published. Check back here for more Javascript content.

Continue Reading