Idris (Lightning Talk)
summary
Side‑by‑side Rust and Idris examples show actual code: length‑indexed vectors let types carry a numeric size so you can declare a list of three ints and get a compile error if you try four; a safe last element function uses a type like no Option for last so the empty case is impossible; demonstrated zip requires equal lengths and a zip‑with‑plus example produces the summed list; the compiler fills boilerplate and types compute values at compile time.
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