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2024-04-06To The ProgrammerA combinator is a kind of function. Specifically, it’s a function that applies its arguments—and only its arguments—to each other in a particular shape and order. The number of possible shapes is of course infinite; but in practice a few fairly simple shapes crop up more often than others,...

It has been said that the most popular programming language in the world is the spreadsheet (and in particular these days, Excel). There is a valid argument that the spreadsheet embodies an array programming model, making Excel the most popular array programming language in the world. As the author of an array progr...

This document was created for a conference of 22 June 2006, organized by AFAPL, Association Francophone pour la promotion du langage APL: a special conference dedicated to our friend Henri Sinturel, now no longer with us. This conference was not designed for those proficient in the language: their needs have been me...