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Solve: A fast Windows PC feels sluggish when moving through code or a list
There are times when a Windows 10 PC feels very sluggish when you’re going through a list (e.g. emails in Outlook or Thunderbird) or even code in a text editor. Often, it has nothing to do with the computer per se, but just the keyboard settings.…
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We're having trouble with your reqest - Netflix fails on Windows
Windows 10 has a nifty feature that allows you to use a second Windows 10 computer as a wireless display by casting your screen to it. However, you will likely have problems casting winodws that are running streaming video, such as Netflix or Amazon Prime.…
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Why we like to use JRuby
We use JRuby quite a bit both for Rails applications and also for general Ruby scripts. I do get asked why one would use JRuby instead of Ruby (meaning C Ruby). This short post is an attempt to list out the main reasons we like to use JRuby. As background, I should mention that we are more a Ruby house and do quite a lot of work in Ruby.…
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Redirect all output to /dev/null on Windows Command
A lot of Linux code redirects output to
/dev/nullas a way of not sending any output to the console. I work in Windows and often use Command Prompt (cmd.exe) as the command shell. This is just a small note to remember how to do the same in Windows.…
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Solve: VisualVM does not start up on Windows with OpenJDK
I just downloaded and tried to run VisualVM on Windows 10 with OpenJDK 8 but it failed. The fix is simple but took a few minutes to find the solution.…
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JRuby on Windows: Using the G1 Garbage Collector Helps
When running with JRuby, you have a few options for selecting the Garbage Collector. This post shows one observation on the memory consumption depending on the garbage collector and JAVA version.…
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JRuby on Windows: Day 3 - Using Apache POI (Java) to create XLSX files
One of the great advantages of using JRuby is the ability to connect with Java libraries (JARs) and call Java code from your Ruby scripts. This post shows how to use Apache POI (the Java API for Microsoft Documents) to generate a simple XLSX file.…
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A more verbose prompt in Windows CMD Shell
I work in Windows and often use Command Prompt (
cmd.exe) as the command shell. This post touches on the new command prompt I use.…
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Rails 7.0 with Ruby 3.0 on Windows: It just works!
Rails 7.0.0 was released just yesterday and as a Ruby user primarily on Windows, I was keen to see if it works and runs on Windows.…
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Ruby 2.7 on Windows: Install and Hello World
Ruby is a dynamic, open source programming language with a focus on simplicity and productivity. It has an elegant syntax that is natural to read and easy to write (from the Ruby web site). On Christmas Day 2020, the core team released version 3.0 with major improvements and new features. However, Ruby 3.0 was a major release with lots of changes and some people are still more familiar with Ruby 2.x first. Last week, it was announced that Ruby on Rails 7.0 would require Ruby 2.7 as the minimum supported version. So, I’m updating my system from Ruby 2.6.8 to Ruby 2.7.4 as my main working version. If you’re new to Ruby 2.7 on Windows, this post will help you get started with Ruby 3 on Windows, and covers the basics of installation. This post is along the same lines as the JRuby Day 0 post from earlier and also the Ruby 3.0 Day 0 post…
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Oracle from Ruby on Windows - OCI, Sequel and NLS_LANG
Accessing the Oracle database from Ruby on Windows requires a few different things but generally works fine. This post covers some of the things that you would encounter and also shows how to access Oracle using Sequel so that you can get started. The information is collected from different places on the Internet but I’ve compiled it all here for ease of access.…
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Tips for Categorising and Storing E-mails
I have evolved a habit and guidelines on how I handle e-mail categorisation and storing. This aids my productivity, so I am sharing it here in case it helps someone else. E-mail gets a bad rap and depending on who you ask, it’s terrible or wonderful. To me, it complements numerous other tools and works well for certain things.…
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7 + 1 Tips for E-mail Subject Lines
E-mail gets a bad rap and depending on who you ask, it’s terrible or wonderful. To me, it complements numerous other tools and I realised that I actually over-think the subject lines for my e-mails. So, I’m sharing that here!…
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JRuby: Using locally built JRuby JARs with Warbler
If you decide to rebuild JRuby locally and want to use Warbler to create an executable JAR with the newly built JRuby, it’s not obvious what you should do. This post provides one way to manage this.…
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JRuby on Windows: Day 3 - Building from Source
There are times when you will need to try out if your code works with a new version of JRuby or maybe, even make a change to the JRuby code and see if this is a change you want to contribute. This post touches on how to set up and build JRuby on your Windows PC.…
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Ruby Tricks 9 - Solving SassC Installation Errors
On Windows, you might face an error installing SassC for use with Rails or with Jekyll, especially if you are using JRuby. Resolving this issue requires having a C/C++ compiler installed on your Windows system and on your path.…
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Cairo with Ruby - Converting code from Cairo to RCairo
Cairo Graphics is a powerful 2D graphics library. Although Cairo is a C library, there are bindings available for many languages. The RCairo gem allows Ruby programs to use Cairo.…
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Cairo with Ruby - Samples using RCairo
Cairo Graphics is a powerful 2D graphics library. Although Cairo is a C library, there are bindings available for many languages. The RCairo gem allows Ruby programs to use Cairo. This page has the simple samples from the Cairographics website, ported to run under Ruby using the RCairo gem.…
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Cairo with Ruby - Installation on Windows
Getting Cairo Graphics to work with Ruby on Windows is straightforward although it scares you a bit in the installation.…
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Java on Windows: switching to a specific Java version/ runtime
This post show how to have multiple Java runtime environments on your PC and switch between them on Windows so that a particular program uses the version that you want it to.…