Polling / Voting System

090_poll_system.cell

// ============================================================================
// 090 — Polling / Voting System
// ============================================================================
// Create polls, cast votes, see results.
//
// Run:   soma run 090_poll_system.cell demo
// Expect:
//   Poll: Favorite Language
//   Vote: Rust
//   Vote: Soma
//   Vote: Rust
//   Vote: Python
//   Vote: Soma
//   Vote: Soma
//   === Results ===
//   Soma: 3 votes
//   Rust: 2 votes
//   Python: 1 votes
//   Total votes: 6

cell PollSystem {

    on demo() {
        let poll_name = "Favorite Language"
        print("Poll: {poll_name}")

        // Collect votes
        let votes = list()
        let raw_votes = list("Rust", "Soma", "Rust", "Python", "Soma", "Soma")

        for v in raw_votes {
            print("Vote: {v}")
            votes = list(votes, map("choice", v))
        }

        // Tally results
        let results = votes |> agg("choice", "choice:count") |> sort_by("count", "desc")

        print("=== Results ===")
        for r in results {
            print("{r.choice}: {r.count} votes")
        }

        let total = votes.length
        print("Total votes: {total}")

        return "done"
    }
}