Adding virtual hosts on Bitnami Apache

Adding virtual hosts on Bitnami Apache

Over the weekend, I’ve spent a substantial chunk of time figuring out how to add a virtual host onto a client’s subdomain. In laymen’s terms, this means that:

  1. My client has a website hosted on a domain (which we shall call example.com, for confidentiality reasons)
  2. We want to build a web application on app.example.com, which will be entirely separate from example.com.
  3. To save on cost, we want to host app.example.com on the same server that example.com is using (i.e. create a virtual host on the web server).

This means that we have to configure our web server so that it will serve a different webroot depending on the domain it is being accessed from.

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Shallow vs. deep copying in Python

Shallow vs. deep copying in Python

If you’ve worked with Lists in Python before, you’ll quickly realise that they work differently from primitives like integers and strings. Consider the following:

a = "hello"
b = a
a = "world"
print(a) # Outputs world
print(b) # Outputs hello

Notice that changing the value of a does not change the value of b. This is called passing by value. In Python, Lists do not behave this way:

a = [2, 3, 4, 5]
b = a
a.append(6)
print(a) # Outputs [2, 3, 4, 5, 6]
print(b) # Outputs [2, 3, 4, 5, 6]

In the above example, notice that changing the value of List a also changes the value of List b. This is because both a and b are referring to the same List, and this is called passing by reference.

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PayPal Conversion
Original photo by Lukas from Pexels: https://www.pexels.com/photo/analytics-blur-business-close-up-590045/

Save money by being smart with PayPal conversion

In today’s digital era, where everything is becoming smarter and faster, and everyone is about doing things that make them look smart, PayPal is absolutely invaluable. It’s a payment platform that stores all of our payment information across different cards and banks, so we don’t have to remember and re-enter pesky things like credit card numbers everytime we purchase something. Just click on PayPal’s big yellow checkout button! It’s the smart thing to do, right?

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Troubleshooting PHP gettext

Debugging PHP gettext

Over the last couple of weeks, I’ve been tinkering with PHP’s gettext to set up internationalisation for one of my web apps (i.e. getting it ready for translation into different languages). Even though there were many step-by-step guides and Stack Overflow topics on the web, all detailing a similar set of instructions, following them did not work things out for me.

After some frustration and a lot of time tinkering, it turns out that these guides were missing some pieces of information. If you are tearing your hair out troubleshooting PHP gettext, this article might be just what you’re looking for.

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Unity Rigidbody Interpolation Hero

Unity Rigidbody’s Interpolate property

If you looked at the properties available for configuration on a Unity Rigidbody and poured through the documentation for it, you’ll likely find that most of its properties are pretty easily to understand, with the exception of Interpolate and Collision Detection. We’ve explored what the Collision Detection properties do in another article on this blog, and we’re going to explore the Interpolate property in this article.

Unity Rigidbody's Interpolate
The Interpolate property has 3 possible values.
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Swords and Shields
Awesome starters artwork by Ry Spirit: https://instagram.com/ryspiritart/

Calculating EVs needed to raise a stat in Pokémon

As a result of working on upgrades for this Pokémon Effort Value Calculator, math has been a pretty big part of my life for the past few months, as I’ve been rearranging the games’ formulas for stat and damage calculation to make my own that fit my needs.

One such formula was the EVs needed one, which gives you the amount of EVs you need to invest to raise a stat by n points. Everyone knows that at Level 100, you get 1 stat point for every 4 EV points you invest; but what happens when you’re not at Level 100, or when you factor in stat modifiers like Nature, or item and ability boosts?

Don’t know what effort values are? Start with this article from Bulbapedia. Don’t play the mainline Pokémon games? Then you should start with these.

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reCAPTCHA Meerkats
Image by Mike Birdy, from https://stocksnap.io/photo/animals-mammals-VJ91Z8LULN

Verifying Google reCAPTCHA v2 checkbox on PHP

17 July 2020: Updated the class provided in this article to make it easier to use.

For those of you using Google reCAPTCHA to weed out spam on your websites, here’s a code snippet for verifying the reCAPTCHA v2 tickbox response on the server-side using PHP.

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RAM in Black
Image by Tim Sullivan, from https://stocksnap.io/photo/computer-ram-IN0CFPMXAQ

RAM, explained in English

RAM stands for Random-Access Memory, but that is something that you can find out just by doing a quick Google search. If you read the results of said Google search to understand what it is, you’ll start running into jargon that can be difficult to understand for a layperson. Here are some examples:

…a form of computer memory that can be read and changed in any order, typically used to store working data and machine code

Wikipedia: https://en.wikipedia.org/wiki/Random-access_memory

…temporary storage that goes away when the power turns off

Avast: https://www.avast.com/c-what-is-ram-memory

…is used to load and run applications, such as your spreadsheet program, respond to commands, such as any edits you made in the spreadsheet, or toggle between multiple programs, such as when you left the spreadsheet to check email

Crucial.com: https://www.crucial.com/articles/about-memory/support-what-does-computer-memory-do

These are not bad examples, per se, but if you don’t work with computers a lot, these explanations will seem very abstract. What does working data mean, for example; or why is RAM temporary storage (why not just make it permanent)?

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Unity Remote Splash Screen
Unity Remote 5 Android app splash screen

More tricks to get Unity Remote for Android working on Windows

This article is a continuation of Getting Unity Remote for Android to work on Windows. If you haven’t read that, I suggest you take a look at the article and make sure that Android Build Support (and its accompanying Unity-native SDK, NDK and JDKs) is installed, and that you have tried installing the Google USB Driver.

There are also some simple troubleshooting tips listed in that article that you should try first, before you attempt the ones here.

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