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This article reviews a Scheme interpreter implemented in J, explaining the tokenizer and recursive descent parser code.
This article demonstrates how to model the COVID-19 outbreak using the SEIRS model implemented in the J programming language, explaining the states and variables involved.
This article introduces how to build a simple sprite editor in the J language, covering window management, grid drawing, keyboard shortcuts, mouse drawing, and palette customization, demonstrating the core techniques of interactive graphics programs.