P!rates [JavaScript]

function piratesProgram(params) {
    let listObj = {}
    let command = params.shift();

    while (command != 'Sail') {
        let commandTowns = command.split('||')
        let town = commandTowns[0];
        let population = Number(commandTowns[1]);
        let gold = Number(commandTowns[2]);

        if (listObj.hasOwnProperty(town)) {
            listObj[town].population += population;
            listObj[town].gold += gold;
        }
        else {
            listObj[town] = {
                population: population,
                gold: gold
            }
        }

        command = params.shift();
    }

    command = params.shift();

    while (command !== 'End') {
        let commandNext = command.split('=>');

        if (commandNext[0] == 'Plunder') {
            let town = commandNext[1];
            let people = Number(commandNext[2]);
            let gold = Number(commandNext[3]);

            console.log(`${town} plundered! ${gold} gold stolen, ${people} citizens killed.`);

            listObj[town].population -= people;
            listObj[town].gold -= gold;

            if ((listObj[town].population <= 0) || (listObj[town].gold <= 0)) {
                console.log(`${town} has been wiped off the map!`);

                delete listObj[town];
            }
        }

        if (commandNext[0] == 'Prosper') {
            let town = commandNext[1];
            let gold = Number(commandNext[2]);

            if (gold < 0) {
                console.log(`Gold added cannot be a negative number!`);
            }
            else {
                listObj[town].gold += gold;
                console.log(`${gold} gold added to the city treasury. ${town} now has ${listObj[town].gold} gold.`);
            }
        }

        command = params.shift();
    }

    let workArr = Object.entries(listObj)

    let sorted = workArr.sort((a, b) => {
        if (a[1].gold == b[1].gold) {
            return a[0].localeCompare(b[0]);
        }
        else {
            return b[1].gold - a[1].gold;
        }
    })

    console.log(`Ahoy, Captain! There are ${sorted.length} wealthy settlements to go to:`)

    for (const kvp of sorted) {
        console.log(`${kvp[0]} -> Population: ${kvp[1].population} citizens, Gold: ${kvp[1].gold} kg`);
    }
}

piratesProgram([
    'Tortuga||345000||1250',
    'Santo Domingo||240000||630',
    'Havana||410000||1100',
    'Sail',
    'Plunder=>Tortuga=>75000=>380',
    'Prosper=>Santo Domingo=>180',
    'End'
])

piratesProgram([
    'Nassau||95000||1000',
    'San Juan||930000||1250',
    'Campeche||270000||690',
    'Port Royal||320000||1000',
    'Port Royal||100000||2000',
    'Sail',
    'Prosper=>Port Royal=>-200',
    'Plunder=>Nassau=>94000=>750',
    'Plunder=>Nassau=>1000=>150',
    'Plunder=>Campeche=>150000=>690',
    'End'
])