Self-tutoring about programming: the tutor mentions undesirable photo rotations. What if, when you place an image in a document, it ends up on its side? It might even appear right-side-up when you view it in the folder, but not in …
Self-tutoring about web experimentation: the tutor shares an observation. In Developer Tools, I get the ‘cache-control header is missing or empty’ when I load a local file, but not one from a server. I’m under the impression that, when that …
Web programming: ‘cache-control header is missing or empty’ Read more »
Self-tutoring about web programming: the tutor mentions the difference between static and dynamic web pages. A static web page means every visitor sees the same content; a dynamic web page delivers content aimed at the particular user, usually because they …
Self-tutoring about .net Webforms: the tutor makes an observation. An important idea to know about, in my opinion, is that, with .net Webform applications, commented-out elements on the webform can still cause errors. In other words, you might have elements …
Self-tutoring about web programming: the tutor brings up IIFE. It’s been my experience that a function need be called to run, but perhaps not always. Apparently, in JavaScript, the construction (function(){ // function code lines // })(); will run spontaneously. …
Web programming: the immediately invoked function expression (IIFE) Read more »
Tutoring programming, you might still use Notepad (I do). The tutor shares an observation. Some text editors have the option to display line numbers, so you can see the exact line you’re on. Since compilers often mention problems in code …
Tutoring web programming, you might encounter a question about Perl. The tutor mentions an observation. Because inline styles use quotes, and then of course printing a string often uses quotes around it, a situation can easily develop in which nested …
Tutoring, definitions are important. The tutor shares the difference between CSS properties and html attributes. A CSS property is something you change to affect the appearance of an element. For instance, the color property can be set to the color …
Tutoring web design, this fact is known. The tutor shares some documentation. I’ve known for some time that the self-closing script tag <script src=”the_script.js” /> seems not to work. Rather, I use <script src=”the_script.js”></script> I’ve wondered why the self-closing script …
Web programming: JavaScript: avoiding the self-closing script tag Read more »
The tutor shows an example of AngularJS in action, with JavaScript’s Math.pow(x,y) function. JavaScript’s function Math.pow(3,4) evaluates 34, giving the answer 81. In that expression, 3 is the base, while 4 is the exponent. Below, you can input a base …