sistems register1 - fundamentals

function solve2(params) {
    let systems = new Map();
    for (const row of params) {
        let [name, component, subComponent] = row.split(' | ');
        if (!systems.get(name)) {
            systems.set(name, new Map());
        }
        let setOfSybcomponents = systems.get(name).get(component);
        if (!setOfSybcomponents) {
            systems.get(name).set(component, []);
            setOfSybcomponents = systems.get(name).get(component);
        }
        setOfSybcomponents.push(subComponent);
    }
    let ident = '|||';
    let sortSystems = (a, b) => (b[1].size - a[1].size !== 0) ? b[1].size - a[1].size // By components count -> x[1].size
        : a[0] < b[0] ? -1 // By Name -> x[0]
            : a[0] > b[0] ? 1
                : 0;
    let result = [...systems]
        .sort((a, b) => sortSystems(a, b))
        .map(sys => sys[0]
            + '\n' + [...sys[1]]
                .sort((a, b) => b[1].length - a[1].length) // By subcomponents count -> x[1].length
                .map(c => ident + c[0] + '\n' + ident + ident + c[1].join('\n' + ident + ident))
                .join('\n')
        )
        .join('\n');
    console.log(result.trim());
}