Learn how to create an HTTP server with the Express library using the JavaScript programming language on the serverside, also known as Nodejs.

The lecture gives a brief overview of what Nodejs is. Then you get introduced to the Express library. After that, you learn how to generate an NPM project with the creation of a package dot json file. The lecture shows you how to install the express package from the Node Package Manager (NPM) registry. You learn that third-party packages are installed in a directory called node_modules

Go over solving a Data Structures and Algorithms (DSA) problem for practice.

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Learn how to build an HTTP web server in the Nodejs (Serverside Javascript) programming language with the ExpressJS library. The lesson goes over generating an NPM project and installing express. Then, you learn how to code a basic server running at a specific port on localhost. You learn how to define endpoint routes and their handler functions. You get exposed to the browser developer tools (DevTools) to monitor network requests so you can understand the request-response from the HTTP GET request made to the web server. You also learn how to send back HTML to the client. You learn how to change the status code of the response. The lesson also shows how to use the static files middleware so you don't have to manually define a route for every asset file that you might have. The lecture also briefly shows how to send back a JSON response to the client.

Learn how to use the remainder operator (percent sign, aka modulo) to go from the last image to the first image. Every time you click the next button, the current image index increments

Web development lessons to help people become developers

Learn how to keep track of the current image index using a JavaScript variable. In order to allow for multiple images to be browsed through as you click the next button, you have to know which image URL to use to display the image

Learn how to define a JavaScript array to keep a list of image URLs for an image gallery widget. The lesson refactors previous code to access the next image URL by its position index on a variable that holds a reference to an array.

Learn how to listen to click events in JavaScript to execute a set of instructions. In particular, you learn to click a button to change an image to another one

A brief introduction to the concept of Arrays in the JavaScript programming language. The lecture uses the browser Developer Tools to type JavaScript statements and walk through building and accessing elements of a sequence of elements grouped together into a variable that holds a reference to an Array data structure.

Learn to create a const variable in the JavaScript programming language to hold a reference to an object that represents a paragraph element.

Learn how to handle click events on an HTML element using a JavaScript function

Learn how to use the JavaScript programming language to change the Cascading Style Sheets (CSS) properties of an HTML element. In particular, you learn how to change the text color and the background color of an element, after having found it on the document by its id attribute.

A brief introduction to the JavaScript programming language in the context of web development and the manipulation of an HTML document. The lecture uses JSFiddle to demonstrate the examples. Learn how to select an element by its id. Learn how to modify CSS properties of an HTML element using JavaScript. The lecture also teaches how to perform an action upon the clicking of an element

Learn how to use Structured Query Language (SQL) to group rows by a certain column. In particular, you learn how to use the GROUP BY statement to consolidate rows grouped by a certain column value

Learn how to use Structured Query Language (SQL) to count the number of rows in a database table. In particular, you learn how to use the COUNT function to find out the number of rows found with your query

Learn how to use Structured Query Language (SQL) to combine matching data from two separate tables. In particular, you learn how to match rows in one table with rows in another, going by the foreign key in one table pointing to the primary key of another table

Learn how to use Structured Query Language (SQL) to update database records. In particular, you learn how to use the UPDATE statement to set a particular column value for the rows in the database. For most cases, you usually specify a WHERE clause to narrow down to a specific row

Learn how to use Structured Query Language (SQL) to delete records from a database. In particular, the lesson teaches you the DELETE FROM statement with a WHERE clause to delete a row by the primary key identifier column. It is important to be very careful going about deleting records, so for most cases, make sure to always add a WHERE clause matching the value of a unique column, since you know only one row will be deleted versus potentially deleted unwanted records by mistake.

Students ask some questions related to Structured Query Language (SQL) and get a response. Is id always the primary key without specifying it? What is VARCHAR(100)? How to sort data in a specific order, ascending or descending?

Learn how to use Structured Query Language (SQL) to insert new rows into a table with a set of given column values. You can also use SQL to add new data to a table

Learn how to use Structured Query Language (SQL) to select rows from a table using a filter that matches a certain condition. You are introduced to the WHERE clause to narrow down the result rows in a query