IT Professional
Here is a quick example of PHP variable substitution:
<?php echo 2 + 2;
$myname = 'Perry';
?>
<h1>This page is all about <?php echo $myname ?></h1>
<?php echo 5 * 5 ?>
<h2>All About <?php echo $myname ?></h2>
The above code snippet assigns ‘Perry’ to the variable $myname, and then uses that variable in the h1 and h2 heading lines.
To set up a server using express.js, add the following code to src/index.js:
// index.js
// This is the main entry point of our application
const express = require('express');
const app = express();
const port = process.env.PORT || 4000;
app.get('/', (req, res) => res.send('Hello World!!!'));
app.listen(port, () =>
console.log(`Server running at http://localhost:${port}`)
);Start the server, and listen on port 4000, with this command:
node src/index.jsYou can now browse to http://localhost:4000, to see Hello World!!!
Any change to the code, will require a restart to the server, and a browser refresh.
To automate this, add the following to your package.json:
"dev": "nodemon src/index.js",You can now use node to monitor for any changes, with this command:
npm run devNode Package Manager (npm) always seems to have an update available. Fortunately, it’s quick and easy to update.
Display the current npm version, update npm, and check the version again:
npm --version
npm install -g npm
npm --versionHere’s the link to the official npm docs for the update.
You can also download the latest node.js if needed here. It’s recommended to use the LTS version, which has been tested with npm.
Thanks to my local library, and my kindle, I recently borrowed the O’Reilly e-book “JavaScript Everywhere“, by Adam D. Scott. “Building Cross-Platform Applications with GraphQL, React, React Native, and Electron”… should be interesting, only 344 pages. Seems like quite a bit to cover, we’ll see.
One of the first requirements early in the book, getting MongoDB up and running. MongoDB is used because it stores your data in JSON format.
Installing the MongoDB community edition on your Window’s laptop is fairly straightforward using these steps, although it does take a few minutes.
After several minutes, you are good to go. MongoDB is now running, and a MongoDB Compass window should be open.
For a simple way to add a search button to your WordPress menu, use the Ivory Search plugin. It provides all sorts of controls, including the “Sliding” option which I selected.
Here’s a great article on adding search, and the options to do so either through a plugin or custom PHP code.
Can’t remember when AIX 3.1 was released? It was 1990. A great website to find this AIX history is on Wikipedia at IBM AIX.
Although this was published a few years back, here’s a link to a very useful list of AIX commands:
The site favicon can be easily changed in WordPress. The favicon is the site icon shown in the browser tab, bookmarks, etc.
The favicon should be a PNG file, which is a 512 x 512 size for WordPress. You can create this using software such as Photoshop, or if you are looking for something simple, use a Favicon Generator. With favicon.io, which I used, it is very easy.
On my version of WordPress this procedure worked.
A helpful blog article on this can be found from wordpress.com here, however I did find that the menu location for the upload was different with my site’s theme and version.
I ran into an issue when attempting to migrate a WordPress site from local to a new AWS Lightsail instance using the popular All-in-One WP Migration plugin.
Normally this plugin works great… use it to perform the usual Export and then Upload / Import it onto the new site. This time, not so much.
Continue reading “WordPress Site Migration Issue with Max Upload Size”Need to work with a really big number in JavaScript? Larger than a normal int? BigInt is your answer!
Say, for example, you were trying to solve the “A Very Big Sum” problem on HackerRank. The code is simple with BigInt():
function aVeryBigSum(ar) {
// Write your code here
let sum = 0n;
for (let i = 0; i < ar.length; i++) {
sum = sum + BigInt(ar[i]);
}
return sum;
}