teaching machines

CS 268: Lecture 19 – Today Client

April 23, 2020 by

Dear students: We have arrived at the last big idea of the semester: managing global state. To deal with complex and shared data in our React apps, we will push the data into an object managed by Redux. With this new manage of managing the data, we’ll have to find new ways of changing state […]

CS 268: Lecture 18 – Today Service

April 21, 2020 by

Dear students: We look at the mechanics of web services last time. Today we build up a non-toy web service for a time capsule application. Behind our web service will be a MySQL database, and our service will endpoints for the four common CRUD operations for operating on our database’s records: creating, rreading, updating, and […]

CS 268: Lecture 17 – Hello, Express

April 16, 2020 by

Dear students: Many websites pull down data from web services, just as we did with the News API. But how are these web services made exactly? That’s what we explore in this lecture. We’ll use Express to create our own web service that responds to HTTP requests and serves back its data through JSON. We’ll […]

CS 268: Lecture 16 – Hello, React

April 14, 2020 by

Dear students: The first theme of this course has been learning the foundational technologies of the web: HTML, CSS, and JavaScript. Today we officially reach the second theme: designing modern web apps with React. Systems like React ease the burden of designing interactive sites with dynamic content. Here’s your TODO list: Install Node.js, an ecosystem […]

CS 268: Lecture 15 – Higher-order Functions

April 9, 2020 by

Dear students: Today we hit up higher-order functions, a feature of modern languages that will shorten up your code considerably. Once you know a few of these higher-order functions, you may never write loops again. Why? Because so much of our looping algorithms follow certain patterns, we can generalize those patterns into reusable functions. For […]

CS 268: Lecture 14 – Fetch

April 7, 2020 by

Dear students: Last time we examined objects and how to pass them around using JSON. This time, we apply these ideas by consuming a web service: News API. We’ll use JavaScript’s builtin fetch function to grab and send JSON data. We started looking at this before spring breeeaaak happened, but I’ve re-implemented the example we […]

CS 268: Lecture 13 – JavaScript Objects

April 2, 2020 by

Dear students: There’s a pandemic going on right now, and it has turned the world upside down. We are no longer able to meet in person. But we’ll try to finish out this semester through the web. How apt. Our format for the rest of this constrained is constrained by a few things. First, we […]

CS 268: Lecture 12 – Forms and Web Services

March 12, 2020 by

Dear students: Last time we started looking at how JavaScript brings actions into normally sedate HTML. We used it to dynamically generate an HTML structure. Today we look at using JavaScript to deal with form input. We’ll also use it to get content from external sources. In particular, we’ll generate a web application for consuming […]

CS 268: Lecture 11 – Media Queries and JavaScript

March 10, 2020 by

Dear students: Last week we started making our web pages sensitive to their presentation environment using media queries. We continue that discussion today and formally break into a discussion of Javascript. Media Queries We saw last time the mechanism for expressing conditional CSS via media queries. A primary use of media queries is to support […]

CS 268: Lecture 9 – Position Continued

March 3, 2020 by

Dear students: Last time we started exploring the position property of CSS. We examined relative positioning only, but we didn’t see a compelling use case for why we’d want anything but static positioning. I hope to address that today by looking at fixed and absolute positioning, which can be used to achieve useful layout effects. […]

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