Transforming items

Transforming items

Run from the repository or distribution root. Put xen on PATH, or substitute ./bin/xen.

Run

xen check examples/iterators.xen
xen run examples/iterators.xen

Expected output

4
6

Complete source

iterators.xen

// SPDX-License-Identifier: MIT OR Apache-2.0
use std.iter;

fn doubled(value: Int) -> Int {
    return value * 2;
}

#![explc]
fn over_two(value: &Int) -> Bool {
    return *value > 2;
}

fn main() {
    let values = [1, 2, 3];
    for value in values.iter().map(doubled).filter(over_two) {
        println(value);
    }
}

Download file

Build an executable

xen build examples/iterators.xen -o app

Run the generated executable on a compatible Linux machine.