Tour of Lux · chapter 5 of 8

Working with data

List, string, and record builtins.

The core toolkit: map / filter / sort / reverse / take / sum / min / max compose over lists, by pipe or by method.

fn main():
    let readings = [231, 187, 204, 156, 248, 199]
    println("min={readings.min()} max={readings.max()}")
    println("top 3: {readings.sort() |> reverse() |> take(3)}")

Strings split, join, trim, and case-fold; records expose keys, values, has, and get for working with them as data.

fn main():
    let csv = "lux, joule , watt"
    let parts = csv.split(",") |> map(s -> s.trim())
    println(parts.join(" | ").upper())

    let config = {host: "localhost", port: 8080}
    let has_tls = config.has("tls")
    let port = config.get("port")
    println("keys: {config.keys()}")
    println("port: {port} has tls? {has_tls}")

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