Programming Languages

Five assignments spanning four languages and as many paradigms — functional (OCaml), lazy/metaprogramming (Racket), object-oriented + functional (Ruby), and array-oriented (APL) — the throughline of a "programming languages" course: the same ideas (sets, streams, interpreters) implemented in languages that make you think about them differently.

#	Language(s)	What it builds
assignment-1-ocaml/	OCaml	A leap-year checker, and a parser that reads a file of country/currency-rate data into typed records, tolerating malformed rows via option types.
assignment-2-ocaml/	OCaml	A functional set ADT (FSET module signature — insert/remove/union/intersect, no mutation) and OToml, a small TOML-like config format with its own type (ovalue), parser, and serializer.
assignment-3-racket/	Racket	Lazy infinite streams built from thunks (stream-for-n-steps, fibo-stream, filter-stream, a create-stream macro), plus an interpreter for a tiny functional language (variables, arithmetic, conditionals, closures, recursive functions) — problem 2 is a from-scratch eval.
assignment-4-ocaml-ruby/	OCaml + Ruby	The same interpreter — a 2D geometry expression language (points, lines, line segments, intersection, let/variable binding, coordinate shifts) — implemented twice: once as an OCaml variant type + pattern matching, once as a Ruby class hierarchy with polymorphic dispatch. Same semantics, opposite paradigm.
assignment-5-ruby-apl/	Ruby + APL	MySet — a polymorphic functional set in Ruby backed by a sorted array, built via Enumerable + a mixin for set algebra (|, &). Then Deoxyribonucleic Arrays: DNA-sequence analysis in APL — nucleotide counting, GC-content, and magic-square detection, written both as APL functions and their tacit ("point-free") equivalents.

Running

• OCaml: ocaml prob1.ml (or load in utop) — each file is self-contained.
• Racket: open in DrRacket, or racket prob1.rkt; problem 3's tests live in prob2_test.rkt.
• Ruby: ruby prob1.rb; tests run with ruby test_prob1.rb.
• APL: load prob2.apl in GNU APL or Dyalog APL; test_prob2.apl exercises it.

🎓 Project Context

Built as part of CSC 330: Programming Languages at the University of Victoria (Spring 2026).

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This repository is maintained for portfolio and educational purposes only. If you are currently enrolled in CSC 330 at the University of Victoria or a similar programming languages course, please note that using this code in your own assignments may constitute a violation of Academic Integrity policies.