Maintaining Py'n'APL Part 2: APL Arrays, Python Objects, and JSON
As part of the bigger, overarching refactoring goal of making Py’n’APL great again, I refactored some of the code that deals with sending data from Python to APL and receiving data from APL into Python. In this blog post, I will describe – to the best of my abilities – how that part of the […]
Maintaining Py'n'APL Part 1: The Beginning
Py’n’APL is an interface between APL and Python that allows you to run Python code from within APL and APL code from within Python. This interface was originally developed by Dyalog Ltd intern Marinus Oosters, who presented it in a webinar and at Dyalog ’17. I subsequently talked about Py’n’APL at Dyalog ’21, where I […]
Enhanced Debugging with Function Keys – Evaluate selection
See also Enhanced Debugging with Function Keys. When tracing through a complex dfn and reaching a guard (condition:result), I am often wary of tracing into that line because if the condition evaluates to 1 then the current function I’m tracing through will terminate and return the result, leading to me losing situational awareness. Normally, I’d […]
Dyalog '18 Videos, Week 6
Happy New Year – and Welcome to the 6th week of Dyalog ’18 video releases! If you enjoy geometry, 2019 starts with a couple of real treats; one which builds up to the use of complex numbers just before the end, and another which starts with them and moves on to Quaternions. Alternatively, if you […]
Dyalog '18 Videos, Week 4
This week is mostly a deep dive into the new world of storing source code in text files rather than workspaces and other “binary” formats. However, in case that is not your cup of tea yet, we can offer you another talk by Marshall Lochbaum, who presents more amazing algorithms to make the very widely […]
Dyalog '18 Videos, Week 3
The four presentations from Dyalog’18 that we are releasing this week address both the visible (user interface) and invisible (performance) parts of application design. Starting with performance: This quote was at the heart of the talk by our invited keynote speaker Martin Thompson. In order to write software which performs well, you need to have […]
Displaying cross-references with SharpPlot
Requirements: Update SharpPlot to v3.37 from my.dyalog.com > Downloads > Tools & Interfaces > GUI Tools > SharpPlot SharpPlot v3.37 introduces Network Maps as a new chart type, and we’re going to use it to display the output of the ]XRef user command, which displays cross-references between all kinds of APL names : ]XRef ⎕SE.Parser […]
Over the Moon with Selenium
Over the years, I have become more and more reluctant to write code without good regression tests – 35 years of software development have taught me that it is just too dangerous! Regression testing of user interfaces has always been difficult, but for the last few weeks I have been working with technologies that put […]
News from Causeway – SharpLeaf (Alpha Preview Now Available)
For more than 20 years, Causeway has been developing APL tools to produce automated publication-quality graphics and typesetting. They differ from most modern technologies on mainly two points: The API philosophy is to keep it simple and clean rather than complex and dirty, so that neat output can be generated with the bare minimum of […]
Isolated Mandelbrot Set Explorer
It amazes me that an equation so simple can produce images so beautiful and complex. I was first introduced to the Mandelbrot set by the August 1985 issue of Scientific American. Wikipedia says “The Mandelbrot set is the set of complex numbers ‘c’ for which the sequence ( c , c² + c , (c²+c)² + c , […]
