ruchy 5.0.0-beta.2

A systems scripting language that transpiles to idiomatic Rust with extreme quality engineering
Documentation 
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// 36_dataframe_basics.ruchy - Deterministic DataFrame golden example [PMAT-101]
//
// Builds a small typed DataFrame, selects a column, and prints a fixed set of
// scalar facts. Every printed line is deterministic so tests/dataframe_golden.rs
// can assert the exact stdout.

fn main() {
    let df = df![
        "name" => ["alice", "bob", "carol"],
        "age" => [30, 25, 35],
        "score" => [90, 82, 77]
    ]

    let rows = df.rows()
    let cols = df.columns()
    println(f"rows={rows}")
    println(f"cols={cols}")

    let names = df.column_names()
    let first_col = names[0]
    let last_col = names[2]
    println(f"first_col={first_col}")
    println(f"last_col={last_col}")

    let ages = df.select("age")
    let age_cols = ages.columns()
    let age_rows = ages.rows()
    println(f"selected_cols={age_cols}")
    println(f"selected_rows={age_rows}")

    let name0 = df.get("name", 0)
    let age2 = df.get("age", 2)
    let score1 = df.get("score", 1)
    println(f"name0={name0}")
    println(f"age2={age2}")
    println(f"score1={score1}")

    let age_sum = ages.sum()
    println(f"age_sum={age_sum}")
}