Easter Shop

function easterShop(input) {
    let availableEggs = Number(input[0]);
    let soldEggs = 0;
    let index = 1;

    let command = input[index++];
    while (command !== "Close") {
        let eggs = Number(input[index++]);
        if (command === "Buy") {
            if (availableEggs - eggs < 0) {
                break;
            }
            availableEggs -= eggs;
            soldEggs += eggs;
        } else if (command === "Fill") {
            availableEggs += eggs;
        }
        command = input[index++];
    }
    if (command === "Close") {
        console.log("Store is closed!");
        console.log(`${soldEggs} eggs sold.`);
    } else {
        console.log("Not enough eggs in store!");
        console.log(`You can buy only ${availableEggs}.`);
    }
}


Решение със shift:

function easterShop(input) {
    let availableEggs = Number(input.shift());
    let soldEggs = 0;

    let command = input.shift();
    while (command !== "Close") {
        let eggs = Number(input.shift());
        if (command === "Buy") {
            if (availableEggs - eggs < 0) {
                break;
            }
            availableEggs -= eggs;
            soldEggs += eggs;
        } else if (command === "Fill") {
            availableEggs += eggs;
        }
        command = input.shift();
    }
    if (command === "Close") {
        console.log("Store is closed!");
        console.log(`${soldEggs} eggs sold.`);
    } else {
        console.log("Not enough eggs in store!");
        console.log(`You can buy only ${availableEggs}.`);
    }
}