May 2020 Meeting

The May 2020 meeting of LRUG will be on Monday the 11th of May, from 6:20pm to 8:00pm (meeting starts at 6:30pm). Like last month the venue this time is wherever you happen to be because it's COMPLETELY VIRTUAL!

We'll run the meeting on our own zoom account, so make sure you have the zoom client for your preferred device, or know how to attend via the web.

Full registration details are given below, note that we will only be sending out the zoom meeting url to people who have registered, so please do make sure you do it.


We've got two talks for you in May so far. There's room for at least one more mid-length talk, or a couple of short ones. We constantly need more talks for the rest of year, so please get in touch on if there's something you'd like to say to LRUG

Comparing the speed and elegance of different computer languages using a Hamiltonian curve algorithm as the comparator

Peter Bell:

My company (Trapeze) specialises in public transport including schedule optimisation. Finding Hamiltonian curves is a sub-problem to the travelling salesman problem and of the general problem of optimising pickup and drop-offs in demand responsive public transport. This talk will compare implementing a Hamiltonian curve finder in a number of different languages. The talk looks both at the speed of the language and the elegance. For Ruby, I compare a couple of different implementations. Other languages that are compared are Elixir, Go, Javascript, Java, C++, C# and Python.

The source code is in a public Github repository details of which I will provide as part of my talk

  1. LRUG May 2020 - Peter Bell - Comparing the speed and elegance of different computer languages

Debugging Ruby HTTP Library Surprises

Sam Joseph:

Some folks prefer 'puts' to debugging with something like pry-byebug, but I'm a huge fan of debuggers, particularly stepping through my own code and the code of the many libraries we all rely on. In combination with bundle open to insert breakpoints into the code of gems being used in your stack, debugging can expose really tricky dependency bugs, as I aim to demonstrate with one that I found in the way different ruby HTTP libraries can interact.

  1. LRUG May 2020 - Sam Joseph - Debugging Ruby HTTP Library Surprises


Last time there was no afterwards, we just stopped the zoom meeting. That felt a bit abrupt, if you've got a good idea of how to replicate the post-talk chats get in touch at and we'll see what we can do.


Prior to attending you should familiarise yourself with our README paying close attention to the code of conduct which applies to all attendees, even though there's no pub or venue. Basically they are good rules to generally live your life by.

Secure your place

Even in a virtual world there are limited places for attending the meeting so you need to register via eventbrite. The link to the zoom meeting will only be sent to registered attendees on the day of the meeting, around about 6pm. Keep an eye out for the email and check your spam just incase.

Do prepare yourself in advance by downloading the zoom client.

Posted by Murray Steele on Apr 25, 2020