Thyrd is an experimental, reflective, visual programming language and environment. In Thyrd, both data and code are stored in cells situated in nested two-dimensional grids. The user interface animates the transition from a cell to its subordinate or superordinate grid to help keep the user oriented in the hierarchical grid structure. All operations the user can perform to edit the structure are i
The Joy of concatenative programming Ruby objects on the stack Performance issues A while ago, I sat down examining a few alternative programming languages I might decide to learn someday. Each of those languages has its own peculiarities, and I didn't choose them randomly, I chose them based on their popularity, power, paradigm and how actively they are developed. I included Factor as the only re
Operations like "dup" and "swap" in stack-based languages are special in that they return multiple results (unlike most other languages which simulate multiple results by returning tuples). I find expressing the concept in a type system challenging (if anyone else has done it successfully I would definitely like to hear about it). One of the core problems is that the type of a function like eval,
The Essence of Concatenative Languages
Andreas Rossberg defined a concise and elegant type system for the concatenative language Cat created by Christopher Diggins that makes clear, once and for all, that the nature of the paradigm is solidly functional, point-free and higher order in a way that, as John Nowak remarks, goes beyond the original conception of Backus' FP. Here I wish to contribute to fixing these important ideas by presen
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