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John Scholes

Developer

Worked at Dyalog Ltd from July 1981 to February 2019

Role Summary

John Morley Scholes (1948–2019) was the lead developer of Dyalog APL in 1981, and a prominent APL designer, teacher, and promoter throughout the rest of his life. He designed and implemented dfns, which have been adopted in numerous recent APL dialects, and maintained the dfns workspace demonstrating their use. He is also known for presentations and papers, in many cases of a whimsical or humorous nature, relating to APL. His 2009 video on implementing Conway’s Game of Life has been widely viewed and introduced many APLers to the language.

Biography

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Geoff Streeter – Celebrating 40 Years with Dyalog

A personal account by John Scholes As a relatively new arrival to Dyalog, I have been working with Geoff for only 35 of his 40 years in the company,... Read

April 2017

John Scholes

Loops, Folds and Tuples

For-loops Given an initial state defined by a number of variables, a for-loop iterates through its argument array modifying the state. A←... ⋄... Read

May 2016

John Scholes

Type Comments

I’ve taken to commenting the closing brace of my inner dfns with a home-grown type notation pinched from the Functional Programming community: dref←{... Read

July 2015

John Scholes

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