build nested array of objects from a flat array

nest.cfc

// https://trycf.com/gist/5276cc942cc493a1e6f42b74b9f93eb0/lucee5?theme=monokai
data = [
    {"id": 1, "message": "one", "parent": 0},
    {"id": 2, "message": "two", "parent": 1},
    {"id": 3, "message": "three", "parent": 2},
    {"id": 4, "message": "four", "parent": 3},
    {"id": 5, "message": "five", "parent": 4},
    {"id": 6, "message": "six", "parent": 5},
    {"id": 7, "message": "seven", "parent": 0},
    {"id": 8, "message": "eight", "parent": 7},
    {"id": 9, "message": "nine", "parent": 8},
    {"id": 10, "message": "ten", "parent": 9}
];

out = [];

root = data.filter((msgs) => {
    return msgs.parent == 0;
});

root.each((msg) => {
    out.append(build(msg))
});

dump(out);

function build(required struct el){
    var msg = {
        "id": el.id,
        "message": el.message,
        "children": []
    }
    var children = data.filter((child) => {
        return child.parent == el.id
    });

    children.each((child) => {
        msg.children.append(build(child));
    });

    return msg;
}